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CMS RVU26D · Effective 2026-10-01

42310 in Wyoming**

Office / nonfacility

$181.13

Base rate per service

Facility setting

$126.01

Base rate per service

Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.

ENT procedure

About 42310: Intraoral salivary gland drainage

Reports intraoral drainage of a salivary gland when the clinician treats a collection requiring drainage through an oral approach.

CPT 42310 describes drainage of a salivary gland through an intraoral approach. It is generally performed by an otolaryngologist or oral and maxillofacial surgeon when a salivary gland or duct collection needs operative drainage through the mouth. The operative note should identify the gland and side, the intraoral route, the condition treated, and the drainage performed. This is distinct from removing a salivary stone, which is reported with a stone-removal code when that is the service performed.

Report 42310 for the intraoral drainage service, not for stone extraction alone or for a drainage procedure performed through an external approach. Documentation should support the clinical indication, site, approach, and work performed. Medicare assigns a 10-day global period, so related postoperative visits during that period are included. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard multiple procedure reduction. Modifier 50 is inappropriate for this code. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.

CMS billing rules for 42310

Global period
Minor procedure with a 10-day global period: related postoperative visits for 10 days are included.
Multiple procedures
Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
Bilateral procedures
Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
Assistant at surgery
Assistant at surgery is paid only with documentation of medical necessity.
Co-surgeons
Co-surgeons not permitted.
Team surgery
Team surgery not permitted.

Where the value comes from

  • Work RVU1.57 · 29%
  • Practice expense (office) RVU3.69 · 67%
  • Malpractice RVU0.22 · 4%

14

Medicare services in 2024 · #6100 by national volume

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

42310 compared with similar codes

Office rates for Wyoming**, from the same CMS release.

42320

Abscess drainage

Submandibular, extraoral approach

$258.49

42310 describes drainage through an intraoral approach; 42320 is the corresponding external-approach drainage service. Use the approach documented in the operative report.

42300

Abscess drainage

Superficial salivary gland

$212.18

42300 is for simple drainage of a parotid abscess. Use 42310 for the intraoral salivary-gland drainage service when the documented procedure fits that description.

42305

Salivary drainage

Extraoral abscess

No office rate

42305 is for complicated drainage of a parotid abscess. The parotid abscess service is distinct from the intraoral salivary-gland drainage described by 42310.

42330

Salivary stone removal

Intraoral submandibular or sublingual

$234.95

42330 covers intraoral removal of a salivary duct stone. Choose it when stone extraction is performed, rather than drainage without stone removal.

The same code, a different location

How does Wyoming** compare?

42310 across payment areas

Same release and payment basis · bars start at $0

  1. Wyoming** · This locality

    $181.13

  2. Los Angeles-Long Beach-Anaheim (Los Angeles/Orange Cnty)

    $205.27

    $24.14 higher than Wyoming**

  3. Dc + Md/Va Suburbs

    $208.64

    $27.51 higher than Wyoming**

  4. Miami

    $199.33

    $18.20 higher than Wyoming**

  5. Chicago

    $193.54

    $12.41 higher than Wyoming**

  6. Manhattan

    $210.67

    $29.54 higher than Wyoming**

  7. Alaska*

    $213.97

    $32.84 higher than Wyoming**

Other payment areas listed in Wyoming appear first, followed by selected cross-country examples. The chart compares amounts, not distance.

Across 109 of 109 CMS payment localities with a supported office rate, 42310 ranges from $162.09 in Arkansas to $239.87 in San Jose-Sunnyvale-Santa Clara (San Benito Cnty). This is a geographic range, not an average.

The code’s RVUs stay the same in these comparisons. Geographic adjustments to work, practice expense and malpractice change the dollar amount. A city name alone may not identify the payment area for a service address.

Compare all 108 other payment areas

  • Alabama

    Alabama · 42310

    Office

    $164.44

    Facility

    $116.22

    $16.69 lower than Wyoming** for the office setting.

  • Arkansas

    Arkansas · 42310

    Office

    $162.09

    Facility

    $114.75

    $19.04 lower than Wyoming** for the office setting.

  • Arizona

    Arizona · 42310

    Office

    $178.16

    Facility

    $124.76

    $2.97 lower than Wyoming** for the office setting.

  • Bakersfield

    California · 42310

    Office

    $192.99

    Facility

    $132.59

    $11.86 higher than Wyoming** for the office setting.

  • Chico

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • El Centro

    California · 42310

    Office

    $192.39

    Facility

    $131.99

    $11.26 higher than Wyoming** for the office setting.

  • Fresno

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Hanford-Corcoran

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Madera

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Merced

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Modesto

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Napa

    California · 42310

    Office

    $221.92

    Facility

    $149.28

    $40.79 higher than Wyoming** for the office setting.

  • Oxnard-Thousand Oaks-Ventura

    California · 42310

    Office

    $204.17

    Facility

    $139.02

    $23.04 higher than Wyoming** for the office setting.

  • Redding

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Rest Of California

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Riverside-San Bernardino-Ontario

    California · 42310

    Office

    $194.73

    Facility

    $134.33

    $13.60 higher than Wyoming** for the office setting.

  • Sacramento-Roseville-Folsom

    California · 42310

    Office

    $201.60

    Facility

    $137.51

    $20.47 higher than Wyoming** for the office setting.

  • Salinas

    California · 42310

    Office

    $200.85

    Facility

    $136.98

    $19.72 higher than Wyoming** for the office setting.

  • San Diego-Chula Vista-Carlsbad

    California · 42310

    Office

    $205.40

    Facility

    $139.49

    $24.27 higher than Wyoming** for the office setting.

  • San Francisco-Oakland-Berkeley (Marin Cnty)

    California · 42310

    Office

    $234.58

    Facility

    $156.87

    $53.45 higher than Wyoming** for the office setting.

  • San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)

    California · 42310

    Office

    $234.33

    Facility

    $156.62

    $53.20 higher than Wyoming** for the office setting.

  • San Jose-Sunnyvale-Santa Clara (San Benito Cnty)

    California · 42310

    Office

    $239.87

    Facility

    $160.40

    $58.74 higher than Wyoming** for the office setting.

  • San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)

    California · 42310

    Office

    $238.85

    Facility

    $159.38

    $57.72 higher than Wyoming** for the office setting.

  • San Luis Obispo-Paso Robles

    California · 42310

    Office

    $197.65

    Facility

    $134.88

    $16.52 higher than Wyoming** for the office setting.

  • Santa Cruz-Watsonville

    California · 42310

    Office

    $207.23

    Facility

    $140.27

    $26.10 higher than Wyoming** for the office setting.

  • Santa Maria-Santa Barbara

    California · 42310

    Office

    $201.56

    Facility

    $137.30

    $20.43 higher than Wyoming** for the office setting.

  • Santa Rosa-Petaluma

    California · 42310

    Office

    $209.30

    Facility

    $141.62

    $28.17 higher than Wyoming** for the office setting.

  • Stockton

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Vallejo

    California · 42310

    Office

    $221.56

    Facility

    $148.92

    $40.43 higher than Wyoming** for the office setting.

  • Visalia

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Yuba City

    California · 42310

    Office

    $192.35

    Facility

    $131.95

    $11.22 higher than Wyoming** for the office setting.

  • Colorado

    Colorado · 42310

    Office

    $189.94

    Facility

    $131.31

    $8.81 higher than Wyoming** for the office setting.

  • Connecticut

    Connecticut · 42310

    Office

    $195.12

    Facility

    $135.76

    $13.99 higher than Wyoming** for the office setting.

  • Delaware

    Delaware · 42310

    Office

    $181.08

    Facility

    $126.63

    $0.05 lower than Wyoming** for the office setting.

  • Fort Lauderdale

    Florida · 42310

    Office

    $190.58

    Facility

    $134.75

    $9.45 higher than Wyoming** for the office setting.

  • Rest Of Florida

    Florida · 42310

    Office

    $181.31

    Facility

    $128.62

    $0.18 higher than Wyoming** for the office setting.

  • Atlanta

    Georgia · 42310

    Office

    $186.64

    Facility

    $130.65

    $5.51 higher than Wyoming** for the office setting.

  • Rest Of Georgia

    Georgia · 42310

    Office

    $171.14

    Facility

    $121.98

    $9.99 lower than Wyoming** for the office setting.

  • Hawaii, Guam

    Hawaii · 42310

    Office

    $196.83

    Facility

    $134.17

    $15.70 higher than Wyoming** for the office setting.

  • Iowa

    Iowa · 42310

    Office

    $168.13

    Facility

    $117.70

    $13.00 lower than Wyoming** for the office setting.

  • Idaho

    Idaho · 42310

    Office

    $169.30

    Facility

    $118.60

    $11.83 lower than Wyoming** for the office setting.

  • East St. Louis

    Illinois · 42310

    Office

    $180.63

    Facility

    $129.93

    $0.50 lower than Wyoming** for the office setting.

  • Rest Of Illinois

    Illinois · 42310

    Office

    $176.45

    Facility

    $126.13

    $4.68 lower than Wyoming** for the office setting.

  • Suburban Chicago

    Illinois · 42310

    Office

    $192.40

    Facility

    $135.81

    $11.27 higher than Wyoming** for the office setting.

  • Indiana

    Indiana · 42310

    Office

    $170.26

    Facility

    $119.17

    $10.87 lower than Wyoming** for the office setting.

  • Kansas

    Kansas · 42310

    Office

    $167.56

    Facility

    $117.74

    $13.57 lower than Wyoming** for the office setting.

  • Kentucky

    Kentucky · 42310

    Office

    $168.73

    Facility

    $119.74

    $12.40 lower than Wyoming** for the office setting.

  • New Orleans

    Louisiana · 42310

    Office

    $176.76

    Facility

    $124.90

    $4.37 lower than Wyoming** for the office setting.

  • Rest Of Louisiana

    Louisiana · 42310

    Office

    $168.55

    Facility

    $119.78

    $12.58 lower than Wyoming** for the office setting.

  • Metropolitan Boston

    Massachusetts · 42310

    Office

    $208.29

    Facility

    $142.49

    $27.16 higher than Wyoming** for the office setting.

  • Rest Of Massachusetts

    Massachusetts · 42310

    Office

    $188.92

    Facility

    $130.88

    $7.79 higher than Wyoming** for the office setting.

  • Baltimore/Surr. Cntys

    Maryland · 42310

    Office

    $194.61

    Facility

    $135.48

    $13.48 higher than Wyoming** for the office setting.

  • Rest Of Maryland

    Maryland · 42310

    Office

    $184.44

    Facility

    $128.66

    $3.31 higher than Wyoming** for the office setting.

  • Rest Of Maine

    Maine · 42310

    Office

    $170.40

    Facility

    $119.70

    $10.73 lower than Wyoming** for the office setting.

  • Southern Maine

    Maine · 42310

    Office

    $179.22

    Facility

    $124.60

    $1.91 lower than Wyoming** for the office setting.

  • Detroit

    Michigan · 42310

    Office

    $183.76

    Facility

    $130.58

    $2.63 higher than Wyoming** for the office setting.

  • Rest Of Michigan

    Michigan · 42310

    Office

    $173.26

    Facility

    $122.95

    $7.87 lower than Wyoming** for the office setting.

  • Minnesota

    Minnesota · 42310

    Office

    $181.44

    Facility

    $124.73

    $0.31 higher than Wyoming** for the office setting.

  • Metropolitan Kansas City

    Missouri · 42310

    Office

    $175.35

    Facility

    $123.60

    $5.78 lower than Wyoming** for the office setting.

  • Metropolitan St. Louis

    Missouri · 42310

    Office

    $177.14

    Facility

    $124.67

    $3.99 lower than Wyoming** for the office setting.

  • Rest Of Missouri

    Missouri · 42310

    Office

    $165.84

    Facility

    $118.33

    $15.29 lower than Wyoming** for the office setting.

  • Mississippi

    Mississippi · 42310

    Office

    $163.99

    Facility

    $116.54

    $17.14 lower than Wyoming** for the office setting.

  • Montana**

    Montana · 42310

    Office

    $183.02

    Facility

    $127.91

    $1.89 higher than Wyoming** for the office setting.

  • North Carolina

    North Carolina · 42310

    Office

    $172.13

    Facility

    $120.71

    $9.00 lower than Wyoming** for the office setting.

  • North Dakota**

    North Dakota · 42310

    Office

    $178.67

    Facility

    $123.56

    $2.46 lower than Wyoming** for the office setting.

  • Nebraska

    Nebraska · 42310

    Office

    $168.98

    Facility

    $118.11

    $12.15 lower than Wyoming** for the office setting.

  • New Hampshire

    New Hampshire · 42310

    Office

    $187.17

    Facility

    $129.80

    $6.04 higher than Wyoming** for the office setting.

  • Northern Nj

    New Jersey · 42310

    Office

    $206.56

    Facility

    $142.63

    $25.43 higher than Wyoming** for the office setting.

  • Rest Of New Jersey

    New Jersey · 42310

    Office

    $197.19

    Facility

    $137.00

    $16.06 higher than Wyoming** for the office setting.

  • New Mexico

    New Mexico · 42310

    Office

    $174.28

    Facility

    $123.75

    $6.85 lower than Wyoming** for the office setting.

  • Nevada**

    Nevada · 42310

    Office

    $181.93

    Facility

    $126.77

    $0.80 higher than Wyoming** for the office setting.

  • Nyc Suburbs/Long Island

    New York · 42310

    Office

    $215.98

    Facility

    $150.46

    $34.85 higher than Wyoming** for the office setting.

  • Poughkpsie/N Nyc Suburbs

    New York · 42310

    Office

    $198.65

    Facility

    $138.30

    $17.52 higher than Wyoming** for the office setting.

  • Queens

    New York · 42310

    Office

    $212.07

    Facility

    $146.93

    $30.94 higher than Wyoming** for the office setting.

  • Rest Of New York

    New York · 42310

    Office

    $174.69

    Facility

    $122.34

    $6.44 lower than Wyoming** for the office setting.

  • Ohio

    Ohio · 42310

    Office

    $172.37

    Facility

    $122.06

    $8.76 lower than Wyoming** for the office setting.

  • Oklahoma

    Oklahoma · 42310

    Office

    $168.21

    Facility

    $119.00

    $12.92 lower than Wyoming** for the office setting.

  • Portland

    Oregon · 42310

    Office

    $195.68

    Facility

    $134.45

    $14.55 higher than Wyoming** for the office setting.

  • Rest Of Oregon

    Oregon · 42310

    Office

    $180.36

    Facility

    $125.47

    $0.77 lower than Wyoming** for the office setting.

  • Metropolitan Philadelphia

    Pennsylvania · 42310

    Office

    $190.45

    Facility

    $133.08

    $9.32 higher than Wyoming** for the office setting.

  • Rest Of Pennsylvania

    Pennsylvania · 42310

    Office

    $172.53

    Facility

    $121.93

    $8.60 lower than Wyoming** for the office setting.

  • Puerto Rico

    Puerto Rico · 42310

    Office

    $184.28

    Facility

    $128.56

    $3.15 higher than Wyoming** for the office setting.

  • Rhode Island

    Rhode Island · 42310

    Office

    $187.31

    Facility

    $130.38

    $6.18 higher than Wyoming** for the office setting.

  • South Carolina

    South Carolina · 42310

    Office

    $172.57

    Facility

    $121.64

    $8.56 lower than Wyoming** for the office setting.

  • South Dakota**

    South Dakota · 42310

    Office

    $178.16

    Facility

    $123.05

    $2.97 lower than Wyoming** for the office setting.

  • Tennessee

    Tennessee · 42310

    Office

    $168.42

    Facility

    $118.32

    $12.71 lower than Wyoming** for the office setting.

  • Austin

    Texas · 42310

    Office

    $189.45

    Facility

    $131.14

    $8.32 higher than Wyoming** for the office setting.

  • Beaumont

    Texas · 42310

    Office

    $171.42

    Facility

    $121.27

    $9.71 lower than Wyoming** for the office setting.

  • Brazoria

    Texas · 42310

    Office

    $180.73

    Facility

    $126.12

    $0.40 lower than Wyoming** for the office setting.

  • Dallas

    Texas · 42310

    Office

    $181.97

    Facility

    $127.08

    $0.84 higher than Wyoming** for the office setting.

  • Fort Worth

    Texas · 42310

    Office

    $180.84

    Facility

    $126.50

    $0.29 lower than Wyoming** for the office setting.

  • Galveston

    Texas · 42310

    Office

    $181.33

    Facility

    $126.60

    $0.20 higher than Wyoming** for the office setting.

  • Houston

    Texas · 42310

    Office

    $185.36

    Facility

    $130.63

    $4.23 higher than Wyoming** for the office setting.

  • Rest Of Texas

    Texas · 42310

    Office

    $176.04

    Facility

    $123.74

    $5.09 lower than Wyoming** for the office setting.

  • Utah

    Utah · 42310

    Office

    $174.89

    Facility

    $123.09

    $6.24 lower than Wyoming** for the office setting.

  • Virginia

    Virginia · 42310

    Office

    $178.78

    Facility

    $124.61

    $2.35 lower than Wyoming** for the office setting.

  • Virgin Islands

    United States Virgin Islands · 42310

    Office

    $184.28

    Facility

    $128.56

    $3.15 higher than Wyoming** for the office setting.

  • Vermont

    Vermont · 42310

    Office

    $178.17

    Facility

    $123.61

    $2.96 lower than Wyoming** for the office setting.

  • Rest Of Washington

    Washington · 42310

    Office

    $188.49

    Facility

    $130.46

    $7.36 higher than Wyoming** for the office setting.

  • Seattle (King Cnty)

    Washington · 42310

    Office

    $212.29

    Facility

    $144.67

    $31.16 higher than Wyoming** for the office setting.

  • Wisconsin

    Wisconsin · 42310

    Office

    $172.78

    Facility

    $119.98

    $8.35 lower than Wyoming** for the office setting.

  • West Virginia

    West Virginia · 42310

    Office

    $170.06

    Facility

    $122.17

    $11.07 lower than Wyoming** for the office setting.

See how rates vary across the country

42310 · Office / nonfacility · Non-QP. Choose a state to explore its payment localities. A range means the amount varies within that state.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$162.09

$216.11

Color shows the midpoint of each state’s locality range.

View all state and territory rates as a table
State / territoryRate rangeLocalities
AK$213.971
AL$164.441
AR$162.091
AZ$178.161
CA$192.35–$239.8729
CO$189.941
CT$195.121
DC$208.641
DE$181.081
FL$181.31–$199.333
GA$171.14–$186.642
GU$196.831
HI$196.831
IA$168.131
ID$169.301
IL$176.45–$193.544
IN$170.261
KS$167.561
KY$168.731
LA$168.55–$176.762
MA$188.92–$208.292
MD$184.44–$208.643
ME$170.40–$179.222
MI$173.26–$183.762
MN$181.441
MO$165.84–$177.143
MS$163.991
MT$183.021
NC$172.131
ND$178.671
NE$168.981
NH$187.171
NJ$197.19–$206.562
NM$174.281
NV$181.931
NY$174.69–$215.985
OH$172.371
OK$168.211
OR$180.36–$195.682
PA$172.53–$190.452
PR$184.281
RI$187.311
SC$172.571
SD$178.161
TN$168.421
TX$171.42–$189.458
UT$174.891
VA$178.78–$208.642
VI$184.281
VT$178.171
WA$188.49–$212.292
WI$172.781
WV$170.061
WY$181.131

Explore 42310 on the national rate map →

Where does this rate apply?

Wyoming** is a Medicare payment area. Our Census mapping connects it to 205 cities and communities in Wyoming, including the examples shown here.

Some communities span more than one payment area. Follow a city link to compare all of its mapped areas, or check the service-location ZIP above for an address-level starting point.

Browse all communities in Wyoming →

Why are the office and facility amounts different?

For 42310 in Wyoming**, the physician’s office rate is $181.13 and the facility-setting rate is $126.01: a difference of $55.12.

The calculation uses a different practice-expense RVU for each setting. Both amounts here are physician fee-schedule amounts. The facility figure does not include a hospital’s separate charges, so this comparison does not tell you the total cost of receiving care in each setting.

See the inputs behind this difference →

Use this rate

What is a percentage of Medicare worth?

Turn a percentage into dollars for 42310 in Wyoming**. This uses the base rate on this page, so the locality and release stay consistent.

Reference amount per service

$199.24

$181.13 × 110% = $199.24

A contract may specify another Medicare year or additional adjustments. This is percentage arithmetic on the displayed base rate, not a claim adjudication.

Working with a whole code list?

Compare an offer across your annual code mix, including an older Medicare schedule or flat per-code rates.

Compare your contract offer →

How this local rate is calculated

Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 42310 in Wyoming**.

PPRRVU2026_Oct_nonQPP.csv

5,022

Code
42310
Physician work
1.57
Practice expense
3.69
Malpractice
0.22

GPCI2026.csv

112

Locality
Wyoming**
Physician work
1.000
Practice expense
1.000
Malpractice
0.740
Office / nonfacility calculation for 42310 in Wyoming**
ComponentRVULocality factorAdjusted
Physician work1.57× 1.0001.5700
Practice expense3.69× 1.0003.6900
Malpractice0.22× 0.7400.1628
Total RVUs5.4228
Conversion factor× 33.4009

Office / nonfacility rate, Wyoming**$181.13

Open 42310 in the RVU calculator →

Explore RVUs, geographic factors and the full formula

Office / nonfacility

Office / nonfacility calculation inputs
ComponentRVULocal GPCI
Work1.571
Practice expense3.691
Malpractice0.220.74

(1.57 × 1 + 3.69 × 1 + 0.22 × 0.74) × $33.4009 = $181.13

Facility

Facility calculation inputs
ComponentRVULocal GPCI
Work1.571
Practice expense2.041
Malpractice0.220.74

(1.57 × 1 + 2.04 × 1 + 0.22 × 0.74) × $33.4009 = $126.01

The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.

How this rate has changed

42310 · Office / nonfacility

$181.13

Effective 2026-10-01

The base rate is $16.22 higher than on 2025-10-01, moving from $164.91 to $181.13 (9.8%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release

  1. January 1, 2026

    RVU26A

    $164.91changed to$181.13

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 1.61 changed to 1.57
    • Practice expense RVU 3.37 changed to 3.69
    • Malpractice RVU 0.16 changed to 0.22
    • Malpractice GPCI 0.739 changed to 0.740

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    Earliest loaded release: $164.91

    Held through RVU25B, RVU25C, RVU25D.

Explore release dates and calculate this code in an earlier period →

Each row uses the accepted CMS release effective on that date and the same contractor and locality identifiers. Missing rates stay visible. Historical boundaries may differ; verify the service address for an older claim.

Inspect every release and its CMS source
Effective fromOffice / nonfacilityFacilityCMS release
2026-10-01$181.13$126.01RVU26D
2026-07-01$181.13$126.01RVU26C
2026-04-01$181.13$126.01RVU26B
2026-01-01$181.13$126.01RVU26A
2025-10-01$164.91$131.59RVU25D
2025-07-01$164.91$131.59RVU25C
2025-04-01$164.91$131.59RVU25B
2025-01-01$164.91$131.59RVU25A

42310 billing questions

How is 42310 distinguished from 42320?

42310 is for salivary gland drainage through an intraoral approach. The approach documented in the operative report distinguishes it from 42320, which is the external-approach service.

Can 42310 be reported for removing a salivary stone?

No. When the procedure removes a salivary calculus, use the applicable stone-removal code, such as 42330 for intraoral duct stone removal, rather than reporting drainage alone.

Is modifier 50 appropriate for bilateral drainage?

No. CMS does not apply a bilateral adjustment to 42310, and modifier 50 is inappropriate for this code.

What documentation supports 42310?

Document the treated gland and side, the condition prompting drainage, the intraoral approach, and the drainage work performed. The note should make clear that drainage, rather than stone removal alone, was the service.

How are related postoperative visits handled?

The code has a 10-day global period, so related postoperative visits during those 10 days are included in the procedure payment.

When is an assistant at surgery payable?

Assistant-at-surgery payment is allowed only when medical necessity is documented. Co-surgeons and team surgery are not permitted.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.

Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.

RVUs for 42310PPRRVU2026_Oct_nonQPP.csv, line 5,022 (RVU26D)
Geographic factors for Wyoming**GPCI2026.csv, line 112 (RVU26D)
Open CMS sourceHow this rate is calculatedBuild a fee sheet