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CMS RVU26D · Effective 2026-10-01

31233 in Modesto

Office / nonfacility

$287.48

Base rate per service

Facility setting

$117.26

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.

Nasal endoscopy

About 31233: Diagnostic maxillary sinus endoscopy

Reports diagnostic endoscopic inspection of the maxillary sinus through the nasal passage when the clinician evaluates disease within that sinus.

An otolaryngologist or rhinologist passes an endoscope through the nasal cavity and into the maxillary sinus through its natural opening to inspect the sinus. The examination may help evaluate suspected maxillary sinus disease, such as persistent symptoms or an abnormal finding that requires direct visualization. This is distinct from an examination confined to the nasal cavity and from operative enlargement of the sinus opening or removal of tissue.

Report the service when the maxillary sinus is entered and diagnostically examined; document the approach, side or sides examined, and relevant findings. The code has a 0-day global period, so same-day preoperative and postoperative care is included. When related endoscopies are performed together, endoscopy family pricing applies. For bilateral reporting, modifier 50 is paid at 150%. Assistant-at-surgery payment requires documentation of medical necessity; co-surgeons and team surgery are not permitted.

CMS billing rules for 31233

Global period
Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
Multiple procedures
Endoscopy family pricing applies when related endoscopies are performed together.
Bilateral procedures
Bilateral procedure with modifier 50 is paid at 150%.
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 RVU2.13 · 26%
  • Practice expense (office) RVU5.73 · 70%
  • Malpractice RVU0.30 · 4%

3.8K

Medicare services in 2024 · #2029 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.

31233 compared with similar codes

Office rates for Modesto, from the same CMS release.

31231

Nasal endoscopy

Diagnostic, without sinusoscopy

$206.14

Choose 31231 for diagnostic inspection confined to the nasal cavity. Choose 31233 when the endoscope enters the maxillary sinus for diagnostic visualization.

31235

Sinus endoscopy

Diagnostic sphenoid sinusoscopy

$326.38

Both are diagnostic sinus endoscopy services, but 31235 targets the sphenoid sinus; 31233 targets the maxillary sinus.

31256

Maxillary antrostomy

Without tissue removal

No office rate

31256 is an operative maxillary sinus procedure that opens the sinus; 31233 is a diagnostic examination through the natural opening.

31267

Sinus endoscopy

Maxillary tissue removal

No office rate

31267 describes operative maxillary sinus endoscopy with tissue removal. Use 31233 for diagnostic inspection without that operative tissue-removal service.

The same code, a different location

How does Modesto compare?

In Bakersfield, the office rate for 31233 is $288.36—$0.88 higher than the $287.48 rate in Modesto. Both use the same code, release and participation basis.

31233 across payment areas

Same release and payment basis · bars start at $0

  1. Modesto · This locality

    $287.48

  2. Bakersfield

    $288.36

    $0.88 higher than Modesto

  3. Chico

    $287.48

    The same base rate than Modesto

  4. El Centro

    $287.53

    $0.05 higher than Modesto

  5. Fresno

    $287.48

    The same base rate than Modesto

  6. Hanford-Corcoran

    $287.48

    The same base rate than Modesto

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

    $307.13

    $19.65 higher than Modesto

Other payment areas listed in California 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, 31233 ranges from $240.71 in Arkansas to $360.32 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

  • Madera

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Merced

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Napa

    California · 31233

    Office

    $332.96

    Facility

    $128.26

    $45.48 higher than Modesto for the office setting.

  • Oxnard-Thousand Oaks-Ventura

    California · 31233

    Office

    $305.60

    Facility

    $122.02

    $18.12 higher than Modesto for the office setting.

  • Redding

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Rest Of California

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Riverside-San Bernardino-Ontario

    California · 31233

    Office

    $290.73

    Facility

    $120.51

    $3.25 higher than Modesto for the office setting.

  • Sacramento-Roseville-Folsom

    California · 31233

    Office

    $301.66

    Facility

    $121.03

    $14.18 higher than Modesto for the office setting.

  • Salinas

    California · 31233

    Office

    $300.54

    Facility

    $120.53

    $13.06 higher than Modesto for the office setting.

  • San Diego-Chula Vista-Carlsbad

    California · 31233

    Office

    $307.61

    Facility

    $121.85

    $20.13 higher than Modesto for the office setting.

  • San Francisco-Oakland-Berkeley (Marin Cnty)

    California · 31233

    Office

    $352.36

    Facility

    $133.36

    $64.88 higher than Modesto for the office setting.

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

    California · 31233

    Office

    $352.02

    Facility

    $133.02

    $64.54 higher than Modesto for the office setting.

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

    California · 31233

    Office

    $360.32

    Facility

    $136.36

    $72.84 higher than Modesto for the office setting.

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

    California · 31233

    Office

    $358.93

    Facility

    $134.97

    $71.45 higher than Modesto for the office setting.

  • San Luis Obispo-Paso Robles

    California · 31233

    Office

    $295.71

    Facility

    $118.81

    $8.23 higher than Modesto for the office setting.

  • Santa Cruz-Watsonville

    California · 31233

    Office

    $310.54

    Facility

    $121.84

    $23.06 higher than Modesto for the office setting.

  • Santa Maria-Santa Barbara

    California · 31233

    Office

    $301.66

    Facility

    $120.57

    $14.18 higher than Modesto for the office setting.

  • Santa Rosa-Petaluma

    California · 31233

    Office

    $313.67

    Facility

    $122.95

    $26.19 higher than Modesto for the office setting.

  • Stockton

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Vallejo

    California · 31233

    Office

    $332.47

    Facility

    $127.77

    $44.99 higher than Modesto for the office setting.

  • Visalia

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Yuba City

    California · 31233

    Office

    $287.48

    Facility

    $117.26

    The same base rate than Modesto for the office setting.

  • Dc + Md/Va Suburbs

    District of Columbia · 31233

    Office

    $311.59

    Facility

    $128.63

    $24.11 higher than Modesto for the office setting.

  • Miami

    Florida · 31233

    Office

    $295.72

    Facility

    $134.04

    $8.24 higher than Modesto for the office setting.

  • Chicago

    Illinois · 31233

    Office

    $286.98

    Facility

    $130.89

    $0.50 lower than Modesto for the office setting.

  • Manhattan

    New York · 31233

    Office

    $313.98

    Facility

    $133.51

    $26.50 higher than Modesto for the office setting.

  • Alaska*

    Alaska · 31233

    Office

    $316.06

    Facility

    $150.65

    $28.58 higher than Modesto for the office setting.

  • Alabama

    Alabama · 31233

    Office

    $244.28

    Facility

    $108.38

    $43.20 lower than Modesto for the office setting.

  • Arkansas

    Arkansas · 31233

    Office

    $240.71

    Facility

    $107.29

    $46.77 lower than Modesto for the office setting.

  • Arizona

    Arizona · 31233

    Office

    $265.18

    Facility

    $114.68

    $22.30 lower than Modesto for the office setting.

  • Colorado

    Colorado · 31233

    Office

    $283.46

    Facility

    $118.21

    $4.02 lower than Modesto for the office setting.

  • Connecticut

    Connecticut · 31233

    Office

    $290.82

    Facility

    $123.54

    $3.34 higher than Modesto for the office setting.

  • Delaware

    Delaware · 31233

    Office

    $269.60

    Facility

    $116.15

    $17.88 lower than Modesto for the office setting.

  • Fort Lauderdale

    Florida · 31233

    Office

    $283.14

    Facility

    $125.80

    $4.34 lower than Modesto for the office setting.

  • Rest Of Florida

    Florida · 31233

    Office

    $269.17

    Facility

    $120.69

    $18.31 lower than Modesto for the office setting.

  • Atlanta

    Georgia · 31233

    Office

    $277.84

    Facility

    $120.04

    $9.64 lower than Modesto for the office setting.

  • Rest Of Georgia

    Georgia · 31233

    Office

    $253.81

    Facility

    $115.27

    $33.67 lower than Modesto for the office setting.

  • Hawaii, Guam

    Hawaii · 31233

    Office

    $294.55

    Facility

    $117.96

    $7.07 higher than Modesto for the office setting.

  • Iowa

    Iowa · 31233

    Office

    $250.24

    Facility

    $108.13

    $37.24 lower than Modesto for the office setting.

  • Idaho

    Idaho · 31233

    Office

    $251.96

    Facility

    $109.07

    $35.52 lower than Modesto for the office setting.

  • East St. Louis

    Illinois · 31233

    Office

    $267.40

    Facility

    $124.51

    $20.08 lower than Modesto for the office setting.

  • Rest Of Illinois

    Illinois · 31233

    Office

    $261.54

    Facility

    $119.74

    $25.94 lower than Modesto for the office setting.

  • Suburban Chicago

    Illinois · 31233

    Office

    $285.95

    Facility

    $126.44

    $1.53 lower than Modesto for the office setting.

  • Indiana

    Indiana · 31233

    Office

    $253.43

    Facility

    $109.45

    $34.05 lower than Modesto for the office setting.

  • Kansas

    Kansas · 31233

    Office

    $249.21

    Facility

    $108.80

    $38.27 lower than Modesto for the office setting.

  • Kentucky

    Kentucky · 31233

    Office

    $250.46

    Facility

    $112.38

    $37.02 lower than Modesto for the office setting.

  • New Orleans

    Louisiana · 31233

    Office

    $262.62

    Facility

    $116.47

    $24.86 lower than Modesto for the office setting.

  • Rest Of Louisiana

    Louisiana · 31233

    Office

    $250.12

    Facility

    $112.67

    $37.36 lower than Modesto for the office setting.

  • Metropolitan Boston

    Massachusetts · 31233

    Office

    $311.50

    Facility

    $126.05

    $24.02 higher than Modesto for the office setting.

  • Rest Of Massachusetts

    Massachusetts · 31233

    Office

    $281.80

    Facility

    $118.25

    $5.68 lower than Modesto for the office setting.

  • Baltimore/Surr. Cntys

    Maryland · 31233

    Office

    $290.04

    Facility

    $123.38

    $2.56 higher than Modesto for the office setting.

  • Rest Of Maryland

    Maryland · 31233

    Office

    $274.74

    Facility

    $117.56

    $12.74 lower than Modesto for the office setting.

  • Rest Of Maine

    Maine · 31233

    Office

    $253.45

    Facility

    $110.56

    $34.03 lower than Modesto for the office setting.

  • Southern Maine

    Maine · 31233

    Office

    $267.13

    Facility

    $113.22

    $20.35 lower than Modesto for the office setting.

  • Detroit

    Michigan · 31233

    Office

    $272.73

    Facility

    $122.85

    $14.75 lower than Modesto for the office setting.

  • Rest Of Michigan

    Michigan · 31233

    Office

    $257.19

    Facility

    $115.39

    $30.29 lower than Modesto for the office setting.

  • Minnesota

    Minnesota · 31233

    Office

    $271.05

    Facility

    $111.23

    $16.43 lower than Modesto for the office setting.

  • Metropolitan Kansas City

    Missouri · 31233

    Office

    $260.65

    Facility

    $114.81

    $26.83 lower than Modesto for the office setting.

  • Metropolitan St. Louis

    Missouri · 31233

    Office

    $263.38

    Facility

    $115.53

    $24.10 lower than Modesto for the office setting.

  • Rest Of Missouri

    Missouri · 31233

    Office

    $245.88

    Facility

    $112.00

    $41.60 lower than Modesto for the office setting.

  • Mississippi

    Mississippi · 31233

    Office

    $243.33

    Facility

    $109.61

    $44.15 lower than Modesto for the office setting.

  • Montana**

    Montana · 31233

    Office

    $272.53

    Facility

    $117.22

    $14.95 lower than Modesto for the office setting.

  • North Carolina

    North Carolina · 31233

    Office

    $256.11

    Facility

    $111.20

    $31.37 lower than Modesto for the office setting.

  • North Dakota**

    North Dakota · 31233

    Office

    $266.60

    Facility

    $111.29

    $20.88 lower than Modesto for the office setting.

  • Nebraska

    Nebraska · 31233

    Office

    $251.58

    Facility

    $108.23

    $35.90 lower than Modesto for the office setting.

  • New Hampshire

    New Hampshire · 31233

    Office

    $279.15

    Facility

    $117.46

    $8.33 lower than Modesto for the office setting.

  • Northern Nj

    New Jersey · 31233

    Office

    $308.34

    Facility

    $128.17

    $20.86 higher than Modesto for the office setting.

  • Rest Of New Jersey

    New Jersey · 31233

    Office

    $293.98

    Facility

    $124.37

    $6.50 higher than Modesto for the office setting.

  • New Mexico

    New Mexico · 31233

    Office

    $258.68

    Facility

    $116.26

    $28.80 lower than Modesto for the office setting.

  • Nevada**

    Nevada · 31233

    Office

    $271.07

    Facility

    $115.60

    $16.41 lower than Modesto for the office setting.

  • Nyc Suburbs/Long Island

    New York · 31233

    Office

    $321.86

    Facility

    $137.20

    $34.38 higher than Modesto for the office setting.

  • Poughkpsie/N Nyc Suburbs

    New York · 31233

    Office

    $296.04

    Facility

    $125.97

    $8.56 higher than Modesto for the office setting.

  • Queens

    New York · 31233

    Office

    $316.37

    Facility

    $132.78

    $28.89 higher than Modesto for the office setting.

  • Rest Of New York

    New York · 31233

    Office

    $260.01

    Facility

    $112.46

    $27.47 lower than Modesto for the office setting.

  • Ohio

    Ohio · 31233

    Office

    $255.98

    Facility

    $114.18

    $31.50 lower than Modesto for the office setting.

  • Oklahoma

    Oklahoma · 31233

    Office

    $249.84

    Facility

    $111.14

    $37.64 lower than Modesto for the office setting.

  • Portland

    Oregon · 31233

    Office

    $292.37

    Facility

    $119.81

    $4.89 higher than Modesto for the office setting.

  • Rest Of Oregon

    Oregon · 31233

    Office

    $268.81

    Facility

    $114.12

    $18.67 lower than Modesto for the office setting.

  • Metropolitan Philadelphia

    Pennsylvania · 31233

    Office

    $283.61

    Facility

    $121.93

    $3.87 lower than Modesto for the office setting.

  • Rest Of Pennsylvania

    Pennsylvania · 31233

    Office

    $256.31

    Facility

    $113.73

    $31.17 lower than Modesto for the office setting.

  • Puerto Rico

    Puerto Rico · 31233

    Office

    $274.51

    Facility

    $117.48

    $12.97 lower than Modesto for the office setting.

  • Rhode Island

    Rhode Island · 31233

    Office

    $279.14

    Facility

    $118.70

    $8.34 lower than Modesto for the office setting.

  • South Carolina

    South Carolina · 31233

    Office

    $256.50

    Facility

    $112.99

    $30.98 lower than Modesto for the office setting.

  • South Dakota**

    South Dakota · 31233

    Office

    $265.90

    Facility

    $110.58

    $21.58 lower than Modesto for the office setting.

  • Tennessee

    Tennessee · 31233

    Office

    $250.50

    Facility

    $109.32

    $36.98 lower than Modesto for the office setting.

  • Austin

    Texas · 31233

    Office

    $282.65

    Facility

    $118.33

    $4.83 lower than Modesto for the office setting.

  • Beaumont

    Texas · 31233

    Office

    $254.62

    Facility

    $113.28

    $32.86 lower than Modesto for the office setting.

  • Brazoria

    Texas · 31233

    Office

    $269.19

    Facility

    $115.28

    $18.29 lower than Modesto for the office setting.

  • Dallas

    Texas · 31233

    Office

    $271.00

    Facility

    $116.31

    $16.48 lower than Modesto for the office setting.

  • Fort Worth

    Texas · 31233

    Office

    $269.22

    Facility

    $116.08

    $18.26 lower than Modesto for the office setting.

  • Galveston

    Texas · 31233

    Office

    $270.06

    Facility

    $115.83

    $17.42 lower than Modesto for the office setting.

  • Houston

    Texas · 31233

    Office

    $275.55

    Facility

    $121.32

    $11.93 lower than Modesto for the office setting.

  • Rest Of Texas

    Texas · 31233

    Office

    $261.82

    Facility

    $114.43

    $25.66 lower than Modesto for the office setting.

  • Utah

    Utah · 31233

    Office

    $260.05

    Facility

    $114.05

    $27.43 lower than Modesto for the office setting.

  • Virginia

    Virginia · 31233

    Office

    $266.35

    Facility

    $113.68

    $21.13 lower than Modesto for the office setting.

  • Virgin Islands

    United States Virgin Islands · 31233

    Office

    $274.51

    Facility

    $117.48

    $12.97 lower than Modesto for the office setting.

  • Vermont

    Vermont · 31233

    Office

    $265.69

    Facility

    $111.93

    $21.79 lower than Modesto for the office setting.

  • Rest Of Washington

    Washington · 31233

    Office

    $281.22

    Facility

    $117.68

    $6.26 lower than Modesto for the office setting.

  • Seattle (King Cnty)

    Washington · 31233

    Office

    $317.72

    Facility

    $127.15

    $30.24 higher than Modesto for the office setting.

  • Wisconsin

    Wisconsin · 31233

    Office

    $257.58

    Facility

    $108.79

    $29.90 lower than Modesto for the office setting.

  • West Virginia

    West Virginia · 31233

    Office

    $251.80

    Facility

    $116.83

    $35.68 lower than Modesto for the office setting.

  • Wyoming**

    Wyoming · 31233

    Office

    $269.95

    Facility

    $114.63

    $17.53 lower than Modesto for the office setting.

See how rates vary across the country

31233 · 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.

$240.71

$323.90

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

View all state and territory rates as a table
State / territoryRate rangeLocalities
AK$316.061
AL$244.281
AR$240.711
AZ$265.181
CA$287.48–$360.3229
CO$283.461
CT$290.821
DC$311.591
DE$269.601
FL$269.17–$295.723
GA$253.81–$277.842
GU$294.551
HI$294.551
IA$250.241
ID$251.961
IL$261.54–$286.984
IN$253.431
KS$249.211
KY$250.461
LA$250.12–$262.622
MA$281.80–$311.502
MD$274.74–$311.593
ME$253.45–$267.132
MI$257.19–$272.732
MN$271.051
MO$245.88–$263.383
MS$243.331
MT$272.531
NC$256.111
ND$266.601
NE$251.581
NH$279.151
NJ$293.98–$308.342
NM$258.681
NV$271.071
NY$260.01–$321.865
OH$255.981
OK$249.841
OR$268.81–$292.372
PA$256.31–$283.612
PR$274.511
RI$279.141
SC$256.501
SD$265.901
TN$250.501
TX$254.62–$282.658
UT$260.051
VA$266.35–$311.592
VI$274.511
VT$265.691
WA$281.22–$317.722
WI$257.581
WV$251.801
WY$269.951

Explore 31233 on the national rate map →

Where does this rate apply?

Modesto is a Medicare payment area. Our Census mapping connects it to 33 cities and communities in California, 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 California →

Why are the office and facility amounts different?

For 31233 in Modesto, the physician’s office rate is $287.48 and the facility-setting rate is $117.26: a difference of $170.22.

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 31233 in Modesto. This uses the base rate on this page, so the locality and release stay consistent.

Reference amount per service

$316.23

$287.48 × 110% = $316.23

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 31233 in Modesto.

PPRRVU2026_Oct_nonQPP.csv

3,525

Code
31233
Physician work
2.13
Practice expense
5.73
Malpractice
0.30

GPCI2026.csv

16

Locality
Modesto
Physician work
1.017
Practice expense
1.096
Malpractice
0.536
Office / nonfacility calculation for 31233 in Modesto
ComponentRVULocality factorAdjusted
Physician work2.13× 1.0172.1662
Practice expense5.73× 1.0966.2801
Malpractice0.30× 0.5360.1608
Total RVUs8.6071
Conversion factor× 33.4009

Office / nonfacility rate, Modesto$287.48

Values as parsed from CMS release RVU26D, effective 2026-10-01. The amount is rounded to the nearest cent only at the end.

Open 31233 in the RVU calculator →

Explore RVUs, geographic factors and the full formula

Office / nonfacility

Office / nonfacility calculation inputs
ComponentRVULocal GPCI
Work2.131.017
Practice expense5.731.096
Malpractice0.30.536

(2.13 × 1.017 + 5.73 × 1.096 + 0.3 × 0.536) × $33.4009 = $287.48

Facility

Facility calculation inputs
ComponentRVULocal GPCI
Work2.131.017
Practice expense1.081.096
Malpractice0.30.536

(2.13 × 1.017 + 1.08 × 1.096 + 0.3 × 0.536) × $33.4009 = $117.26

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

31233 · Office / nonfacility

$287.48

Effective 2026-10-01

The base rate is $11.85 higher than on 2025-10-01, moving from $275.63 to $287.48 (4.3%).

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

    $275.63changed to$287.48

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 2.18 changed to 2.13
    • Practice expense RVU 5.62 changed to 5.73
    • Work GPCI 1.014 changed to 1.017
    • Practice expense GPCI 1.093 changed to 1.096
    • Malpractice GPCI 0.560 changed to 0.536

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    Earliest loaded release: $275.63

    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$287.48$117.26RVU26D
2026-07-01$287.48$117.26RVU26C
2026-04-01$287.48$117.26RVU26B
2026-01-01$287.48$117.26RVU26A
2025-10-01$275.63$132.80RVU25D
2025-07-01$275.63$132.80RVU25C
2025-04-01$275.63$132.80RVU25B
2025-01-01$275.63$132.80RVU25A

31233 billing questions

How does this differ from 31231?

31231 describes diagnostic nasal endoscopy limited to the nasal cavity. Use 31233 when the scope is advanced into and used to inspect the maxillary sinus.

How does this differ from 31235?

31235 is the diagnostic endoscopic examination of the sphenoid sinus. Code 31233 is for diagnostic examination of the maxillary sinus.

Can 31233 be reported with another endoscopy code?

Related endoscopies may be performed together, but CMS endoscopy family pricing applies. Document the distinct anatomic sites and services performed.

How is bilateral work reported?

For bilateral performance, report modifier 50; CMS pays 31233 at 150%. Document examination of both maxillary sinuses.

Can 31233 be reported for a maxillary antrostomy?

No. A diagnostic examination through the natural sinus opening is different from operative creation or enlargement of an opening, such as the service represented by 31256.

What documentation supports 31233?

Record that the endoscope entered the maxillary sinus, the side examined, and the diagnostic findings. A note describing nasal-cavity inspection alone supports a different service.

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 31233PPRRVU2026_Oct_nonQPP.csv, line 3,525 (RVU26D)
Geographic factors for ModestoGPCI2026.csv, line 16 (RVU26D)
Open CMS sourceHow this rate is calculatedBuild a fee sheet