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CMS RVU26D · Effective 2026-10-01

77338 in Chico

Office / nonfacility

$504.85

Base rate per service

Facility setting

Not available in this setting

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.

Radiation oncology

About 77338: IMRT multileaf collimator design

Reports design of multileaf collimator devices that shape radiation fields for intensity-modulated radiation therapy, counted per IMRT plan.

This service covers planning the multileaf collimator (MLC) leaf positions needed to shape and modulate radiation fields for an intensity-modulated radiation therapy (IMRT) plan. A medical physicist or dosimetrist typically performs the technical design work as part of radiation treatment planning, with the radiation oncologist directing the treatment approach. The work supports delivery of the planned dose to the target while shaping radiation around nearby normal tissues.

Report the service per IMRT plan, not per treatment fraction. Documentation should connect the MLC design to the specific IMRT plan and identify the design work performed. CMS recognizes professional and technical components: modifier 26 identifies the professional component, modifier TC identifies the technical component, and an unmodified claim represents the global service. The IMRT dose plan itself is reported separately when supported; MLC device design is distinct from dose calculation and from design of other treatment aids.

CMS billing rules for 77338

Professional and technical components
Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.

Where the value comes from

  • Work RVU4.18 · 29%
  • Practice expense (office) RVU9.79 · 69%
  • Malpractice RVU0.25 · 2%

211.7K

Medicare services in 2024 · #374 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.

77338 compared with similar codes

Office rates for Chico, from the same CMS release.

77301

IMRT planning

Dose optimization and volume analysis

$2,114.84

Choose 77301 for the IMRT treatment dose plan; 77338 represents the MLC device design associated with that plan.

77300

Dosimetry calculation

Basic, per calculation

$71.25

77300 represents a radiation dose calculation, not design of the MLC leaf pattern for an IMRT plan.

77332

Treatment aid

Simple device

$42.94

77332 concerns a simple radiation treatment aid. 77338 is specific to MLC design for IMRT, rather than a general treatment aid.

The same code, a different location

How does Chico compare?

In Bakersfield, the office rate for 77338 is $505.74—$0.89 higher than the $504.85 rate in Chico. Both use the same code, release and participation basis.

77338 across payment areas

Same release and payment basis · bars start at $0

  1. Chico · This locality

    $504.85

  2. Bakersfield

    $505.74

    $0.89 higher than Chico

  3. El Centro

    $504.89

    $0.04 higher than Chico

  4. Fresno

    $504.85

    The same base rate than Chico

  5. Hanford-Corcoran

    $504.85

    The same base rate than Chico

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

    $537.72

    $32.87 higher than Chico

  7. Madera

    $504.85

    The same base rate than Chico

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, 77338 ranges from $424.80 in Arkansas to $630.98 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

  • Merced

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Modesto

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Napa

    California · 77338

    Office

    $583.63

    Facility

    Unavailable

    $78.78 higher than Chico for the office setting.

  • Oxnard-Thousand Oaks-Ventura

    California · 77338

    Office

    $535.24

    Facility

    Unavailable

    $30.39 higher than Chico for the office setting.

  • Redding

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Rest Of California

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Riverside-San Bernardino-Ontario

    California · 77338

    Office

    $507.64

    Facility

    Unavailable

    $2.79 higher than Chico for the office setting.

  • Sacramento-Roseville-Folsom

    California · 77338

    Office

    $529.41

    Facility

    Unavailable

    $24.56 higher than Chico for the office setting.

  • Salinas

    California · 77338

    Office

    $527.41

    Facility

    Unavailable

    $22.56 higher than Chico for the office setting.

  • San Diego-Chula Vista-Carlsbad

    California · 77338

    Office

    $539.42

    Facility

    Unavailable

    $34.57 higher than Chico for the office setting.

  • San Francisco-Oakland-Berkeley (Marin Cnty)

    California · 77338

    Office

    $617.77

    Facility

    Unavailable

    $112.92 higher than Chico for the office setting.

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

    California · 77338

    Office

    $617.49

    Facility

    Unavailable

    $112.64 higher than Chico for the office setting.

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

    California · 77338

    Office

    $630.98

    Facility

    Unavailable

    $126.13 higher than Chico for the office setting.

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

    California · 77338

    Office

    $629.82

    Facility

    Unavailable

    $124.97 higher than Chico for the office setting.

  • San Luis Obispo-Paso Robles

    California · 77338

    Office

    $518.91

    Facility

    Unavailable

    $14.06 higher than Chico for the office setting.

  • Santa Cruz-Watsonville

    California · 77338

    Office

    $544.32

    Facility

    Unavailable

    $39.47 higher than Chico for the office setting.

  • Santa Maria-Santa Barbara

    California · 77338

    Office

    $529.28

    Facility

    Unavailable

    $24.43 higher than Chico for the office setting.

  • Santa Rosa-Petaluma

    California · 77338

    Office

    $549.83

    Facility

    Unavailable

    $44.98 higher than Chico for the office setting.

  • Stockton

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Vallejo

    California · 77338

    Office

    $583.22

    Facility

    Unavailable

    $78.37 higher than Chico for the office setting.

  • Visalia

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Yuba City

    California · 77338

    Office

    $504.85

    Facility

    Unavailable

    The same base rate than Chico for the office setting.

  • Dc + Md/Va Suburbs

    District of Columbia · 77338

    Office

    $541.65

    Facility

    Unavailable

    $36.80 higher than Chico for the office setting.

  • Miami

    Florida · 77338

    Office

    $501.14

    Facility

    Unavailable

    $3.71 lower than Chico for the office setting.

  • Chicago

    Illinois · 77338

    Office

    $488.39

    Facility

    Unavailable

    $16.46 lower than Chico for the office setting.

  • Manhattan

    New York · 77338

    Office

    $541.76

    Facility

    Unavailable

    $36.91 higher than Chico for the office setting.

  • Alaska*

    Alaska · 77338

    Office

    $562.27

    Facility

    Unavailable

    $57.42 higher than Chico for the office setting.

  • Alabama

    Alabama · 77338

    Office

    $430.46

    Facility

    Unavailable

    $74.39 lower than Chico for the office setting.

  • Arkansas

    Arkansas · 77338

    Office

    $424.80

    Facility

    Unavailable

    $80.05 lower than Chico for the office setting.

  • Arizona

    Arizona · 77338

    Office

    $463.62

    Facility

    Unavailable

    $41.23 lower than Chico for the office setting.

  • Colorado

    Colorado · 77338

    Office

    $495.74

    Facility

    Unavailable

    $9.11 lower than Chico for the office setting.

  • Connecticut

    Connecticut · 77338

    Office

    $504.69

    Facility

    Unavailable

    $0.16 lower than Chico for the office setting.

  • Delaware

    Delaware · 77338

    Office

    $470.89

    Facility

    Unavailable

    $33.96 lower than Chico for the office setting.

  • Fort Lauderdale

    Florida · 77338

    Office

    $485.96

    Facility

    Unavailable

    $18.89 lower than Chico for the office setting.

  • Rest Of Florida

    Florida · 77338

    Office

    $464.77

    Facility

    Unavailable

    $40.08 lower than Chico for the office setting.

  • Atlanta

    Georgia · 77338

    Office

    $482.29

    Facility

    Unavailable

    $22.56 lower than Chico for the office setting.

  • Rest Of Georgia

    Georgia · 77338

    Office

    $441.25

    Facility

    Unavailable

    $63.60 lower than Chico for the office setting.

  • Hawaii, Guam

    Hawaii · 77338

    Office

    $516.24

    Facility

    Unavailable

    $11.39 higher than Chico for the office setting.

  • Iowa

    Iowa · 77338

    Office

    $442.13

    Facility

    Unavailable

    $62.72 lower than Chico for the office setting.

  • Idaho

    Idaho · 77338

    Office

    $444.40

    Facility

    Unavailable

    $60.45 lower than Chico for the office setting.

  • East St. Louis

    Illinois · 77338

    Office

    $457.27

    Facility

    Unavailable

    $47.58 lower than Chico for the office setting.

  • Rest Of Illinois

    Illinois · 77338

    Office

    $451.21

    Facility

    Unavailable

    $53.64 lower than Chico for the office setting.

  • Suburban Chicago

    Illinois · 77338

    Office

    $491.21

    Facility

    Unavailable

    $13.64 lower than Chico for the office setting.

  • Indiana

    Indiana · 77338

    Office

    $446.80

    Facility

    Unavailable

    $58.05 lower than Chico for the office setting.

  • Kansas

    Kansas · 77338

    Office

    $439.43

    Facility

    Unavailable

    $65.42 lower than Chico for the office setting.

  • Kentucky

    Kentucky · 77338

    Office

    $437.95

    Facility

    Unavailable

    $66.90 lower than Chico for the office setting.

  • New Orleans

    Louisiana · 77338

    Office

    $456.80

    Facility

    Unavailable

    $48.05 lower than Chico for the office setting.

  • Rest Of Louisiana

    Louisiana · 77338

    Office

    $437.01

    Facility

    Unavailable

    $67.84 lower than Chico for the office setting.

  • Metropolitan Boston

    Massachusetts · 77338

    Office

    $543.20

    Facility

    Unavailable

    $38.35 higher than Chico for the office setting.

  • Rest Of Massachusetts

    Massachusetts · 77338

    Office

    $492.83

    Facility

    Unavailable

    $12.02 lower than Chico for the office setting.

  • Baltimore/Surr. Cntys

    Maryland · 77338

    Office

    $503.04

    Facility

    Unavailable

    $1.81 lower than Chico for the office setting.

  • Rest Of Maryland

    Maryland · 77338

    Office

    $479.60

    Facility

    Unavailable

    $25.25 lower than Chico for the office setting.

  • Rest Of Maine

    Maine · 77338

    Office

    $445.64

    Facility

    Unavailable

    $59.21 lower than Chico for the office setting.

  • Southern Maine

    Maine · 77338

    Office

    $468.94

    Facility

    Unavailable

    $35.91 lower than Chico for the office setting.

  • Detroit

    Michigan · 77338

    Office

    $469.24

    Facility

    Unavailable

    $35.61 lower than Chico for the office setting.

  • Rest Of Michigan

    Michigan · 77338

    Office

    $447.59

    Facility

    Unavailable

    $57.26 lower than Chico for the office setting.

  • Minnesota

    Minnesota · 77338

    Office

    $478.57

    Facility

    Unavailable

    $26.28 lower than Chico for the office setting.

  • Metropolitan Kansas City

    Missouri · 77338

    Office

    $454.82

    Facility

    Unavailable

    $50.03 lower than Chico for the office setting.

  • Metropolitan St. Louis

    Missouri · 77338

    Office

    $459.28

    Facility

    Unavailable

    $45.57 lower than Chico for the office setting.

  • Rest Of Missouri

    Missouri · 77338

    Office

    $429.62

    Facility

    Unavailable

    $75.23 lower than Chico for the office setting.

  • Mississippi

    Mississippi · 77338

    Office

    $427.33

    Facility

    Unavailable

    $77.52 lower than Chico for the office setting.

  • Montana**

    Montana · 77338

    Office

    $474.94

    Facility

    Unavailable

    $29.91 lower than Chico for the office setting.

  • North Carolina

    North Carolina · 77338

    Office

    $450.04

    Facility

    Unavailable

    $54.81 lower than Chico for the office setting.

  • North Dakota**

    North Dakota · 77338

    Office

    $470.00

    Facility

    Unavailable

    $34.85 lower than Chico for the office setting.

  • Nebraska

    Nebraska · 77338

    Office

    $444.59

    Facility

    Unavailable

    $60.26 lower than Chico for the office setting.

  • New Hampshire

    New Hampshire · 77338

    Office

    $487.32

    Facility

    Unavailable

    $17.53 lower than Chico for the office setting.

  • Northern Nj

    New Jersey · 77338

    Office

    $536.64

    Facility

    Unavailable

    $31.79 higher than Chico for the office setting.

  • Rest Of New Jersey

    New Jersey · 77338

    Office

    $511.44

    Facility

    Unavailable

    $6.59 higher than Chico for the office setting.

  • New Mexico

    New Mexico · 77338

    Office

    $449.50

    Facility

    Unavailable

    $55.35 lower than Chico for the office setting.

  • Nevada**

    Nevada · 77338

    Office

    $473.89

    Facility

    Unavailable

    $30.96 lower than Chico for the office setting.

  • Nyc Suburbs/Long Island

    New York · 77338

    Office

    $552.85

    Facility

    Unavailable

    $48.00 higher than Chico for the office setting.

  • Poughkpsie/N Nyc Suburbs

    New York · 77338

    Office

    $514.06

    Facility

    Unavailable

    $9.21 higher than Chico for the office setting.

  • Queens

    New York · 77338

    Office

    $547.10

    Facility

    Unavailable

    $42.25 higher than Chico for the office setting.

  • Rest Of New York

    New York · 77338

    Office

    $456.13

    Facility

    Unavailable

    $48.72 lower than Chico for the office setting.

  • Ohio

    Ohio · 77338

    Office

    $446.58

    Facility

    Unavailable

    $58.27 lower than Chico for the office setting.

  • Oklahoma

    Oklahoma · 77338

    Office

    $438.11

    Facility

    Unavailable

    $66.74 lower than Chico for the office setting.

  • Portland

    Oregon · 77338

    Office

    $511.35

    Facility

    Unavailable

    $6.50 higher than Chico for the office setting.

  • Rest Of Oregon

    Oregon · 77338

    Office

    $471.17

    Facility

    Unavailable

    $33.68 lower than Chico for the office setting.

  • Metropolitan Philadelphia

    Pennsylvania · 77338

    Office

    $492.49

    Facility

    Unavailable

    $12.36 lower than Chico for the office setting.

  • Rest Of Pennsylvania

    Pennsylvania · 77338

    Office

    $447.69

    Facility

    Unavailable

    $57.16 lower than Chico for the office setting.

  • Puerto Rico

    Puerto Rico · 77338

    Office

    $478.43

    Facility

    Unavailable

    $26.42 lower than Chico for the office setting.

  • Rhode Island

    Rhode Island · 77338

    Office

    $487.50

    Facility

    Unavailable

    $17.35 lower than Chico for the office setting.

  • South Carolina

    South Carolina · 77338

    Office

    $448.86

    Facility

    Unavailable

    $55.99 lower than Chico for the office setting.

  • South Dakota**

    South Dakota · 77338

    Office

    $469.42

    Facility

    Unavailable

    $35.43 lower than Chico for the office setting.

  • Tennessee

    Tennessee · 77338

    Office

    $441.34

    Facility

    Unavailable

    $63.51 lower than Chico for the office setting.

  • Austin

    Texas · 77338

    Office

    $493.25

    Facility

    Unavailable

    $11.60 lower than Chico for the office setting.

  • Beaumont

    Texas · 77338

    Office

    $444.94

    Facility

    Unavailable

    $59.91 lower than Chico for the office setting.

  • Brazoria

    Texas · 77338

    Office

    $471.30

    Facility

    Unavailable

    $33.55 lower than Chico for the office setting.

  • Dallas

    Texas · 77338

    Office

    $473.72

    Facility

    Unavailable

    $31.13 lower than Chico for the office setting.

  • Fort Worth

    Texas · 77338

    Office

    $470.56

    Facility

    Unavailable

    $34.29 lower than Chico for the office setting.

  • Galveston

    Texas · 77338

    Office

    $472.35

    Facility

    Unavailable

    $32.50 lower than Chico for the office setting.

  • Houston

    Texas · 77338

    Office

    $476.93

    Facility

    Unavailable

    $27.92 lower than Chico for the office setting.

  • Rest Of Texas

    Texas · 77338

    Office

    $457.47

    Facility

    Unavailable

    $47.38 lower than Chico for the office setting.

  • Utah

    Utah · 77338

    Office

    $454.49

    Facility

    Unavailable

    $50.36 lower than Chico for the office setting.

  • Virginia

    Virginia · 77338

    Office

    $466.95

    Facility

    Unavailable

    $37.90 lower than Chico for the office setting.

  • Virgin Islands

    United States Virgin Islands · 77338

    Office

    $478.43

    Facility

    Unavailable

    $26.42 lower than Chico for the office setting.

  • Vermont

    Vermont · 77338

    Office

    $467.57

    Facility

    Unavailable

    $37.28 lower than Chico for the office setting.

  • Rest Of Washington

    Washington · 77338

    Office

    $492.11

    Facility

    Unavailable

    $12.74 lower than Chico for the office setting.

  • Seattle (King Cnty)

    Washington · 77338

    Office

    $554.64

    Facility

    Unavailable

    $49.79 higher than Chico for the office setting.

  • Wisconsin

    Wisconsin · 77338

    Office

    $455.45

    Facility

    Unavailable

    $49.40 lower than Chico for the office setting.

  • West Virginia

    West Virginia · 77338

    Office

    $435.72

    Facility

    Unavailable

    $69.13 lower than Chico for the office setting.

  • Wyoming**

    Wyoming · 77338

    Office

    $472.79

    Facility

    Unavailable

    $32.06 lower than Chico for the office setting.

See how rates vary across the country

77338 · 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.

$424.80

$567.92

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

View all state and territory rates as a table
State / territoryRate rangeLocalities
AK$562.271
AL$430.461
AR$424.801
AZ$463.621
CA$504.85–$630.9829
CO$495.741
CT$504.691
DC$541.651
DE$470.891
FL$464.77–$501.143
GA$441.25–$482.292
GU$516.241
HI$516.241
IA$442.131
ID$444.401
IL$451.21–$491.214
IN$446.801
KS$439.431
KY$437.951
LA$437.01–$456.802
MA$492.83–$543.202
MD$479.60–$541.653
ME$445.64–$468.942
MI$447.59–$469.242
MN$478.571
MO$429.62–$459.283
MS$427.331
MT$474.941
NC$450.041
ND$470.001
NE$444.591
NH$487.321
NJ$511.44–$536.642
NM$449.501
NV$473.891
NY$456.13–$552.855
OH$446.581
OK$438.111
OR$471.17–$511.352
PA$447.69–$492.492
PR$478.431
RI$487.501
SC$448.861
SD$469.421
TN$441.341
TX$444.94–$493.258
UT$454.491
VA$466.95–$541.652
VI$478.431
VT$467.571
WA$492.11–$554.642
WI$455.451
WV$435.721
WY$472.791

Explore 77338 on the national rate map →

Where does this rate apply?

Chico is a Medicare payment area. Our Census mapping connects it to 30 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 →

Use this rate

What is a percentage of Medicare worth?

Turn a percentage into dollars for 77338 in Chico. This uses the base rate on this page, so the locality and release stay consistent.

Reference amount per service

$555.34

$504.85 × 110% = $555.34

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 77338 in Chico.

PPRRVU2026_Oct_nonQPP.csv

9,084

Code
77338
Physician work
4.18
Practice expense
9.79
Malpractice
0.25

GPCI2026.csv

9

Locality
Chico
Physician work
1.017
Practice expense
1.096
Malpractice
0.536
Office / nonfacility calculation for 77338 in Chico
ComponentRVULocality factorAdjusted
Physician work4.18× 1.0174.2511
Practice expense9.79× 1.09610.7298
Malpractice0.25× 0.5360.1340
Total RVUs15.1149
Conversion factor× 33.4009

Office / nonfacility rate, Chico$504.85

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

Open 77338 in the RVU calculator →

Explore RVUs, geographic factors and the full formula

Office / nonfacility

Office / nonfacility calculation inputs
ComponentRVULocal GPCI
Work4.181.017
Practice expense9.791.096
Malpractice0.250.536

(4.18 × 1.017 + 9.79 × 1.096 + 0.25 × 0.536) × $33.4009 = $504.85

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

77338 · Office / nonfacility

$504.85

Effective 2026-10-01

The base rate is $15.61 higher than on 2025-10-01, moving from $489.24 to $504.85 (3.2%).

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

    $489.24changed to$504.85

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 4.29 changed to 4.18
    • Practice expense RVU 9.73 changed to 9.79
    • 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: $489.24

    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$504.85Not available in this settingRVU26D
2026-07-01$504.85Not available in this settingRVU26C
2026-04-01$504.85Not available in this settingRVU26B
2026-01-01$504.85Not available in this settingRVU26A
2025-10-01$489.24Not available in this settingRVU25D
2025-07-01$489.24Not available in this settingRVU25C
2025-04-01$489.24Not available in this settingRVU25B
2025-01-01$489.24Not available in this settingRVU25A

77338 billing questions

How is 77338 distinguished from 77301?

77338 represents the MLC device design for an IMRT plan. 77301 represents the IMRT treatment planning work, including the dose plan; the services describe different parts of planning.

Is 77338 reported per treatment fraction or per plan?

Report it per IMRT plan, rather than once for each delivered fraction.

Which modifier identifies each component?

Use modifier 26 for the professional component and modifier TC for the technical component. Submit without a component modifier for the global service.

Does 77338 include the IMRT dose calculation?

No. It describes MLC device design; the dose-planning work is represented separately when applicable and documented.

What documentation supports 77338?

The record should identify the IMRT plan and show the MLC design work performed for that plan. It should support the per-plan unit reported.

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 77338PPRRVU2026_Oct_nonQPP.csv, line 9,084 (RVU26D)
Geographic factors for ChicoGPCI2026.csv, line 9 (RVU26D)
Open CMS sourceHow this rate is calculatedBuild a fee sheet