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CMS RVU26D · Effective 2026-10-01

94690 in Delaware

Office / nonfacility

$51.79

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.

Pulmonary function testing

About 94690: Resting indirect calorimetry

Measures oxygen uptake at rest by indirect calorimetry to estimate resting energy expenditure when a patient’s nutritional needs require metabolic assessment.

This test measures oxygen uptake while the patient is resting, using indirect calorimetry to estimate resting energy expenditure. It is used when a clinical team needs an individualized measure to support nutritional management, such as for a patient with complex energy needs. Testing is typically performed in a pulmonary or metabolic testing setting by trained staff using gas-analysis equipment, with a clinician interpreting the results.

Report 94690 for the resting indirect-calorimetry service, not for exercise testing or a broader expired-gas analysis. Documentation should identify the clinical reason for measuring resting energy expenditure, confirm that the measurement was obtained at rest, and include the test findings and interpretation. CMS recognizes a global service when billed without a component modifier, or separate professional and technical portions: modifier 26 represents interpretation, while modifier TC represents the equipment and staff portion. Both modifiers are separately priced under the CMS facts for this code.

CMS billing rules for 94690

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 RVU0.07 · 4%
  • Practice expense (office) RVU1.48 · 94%
  • Malpractice RVU0.02 · 1%

8.2K

Medicare services in 2024 · #1575 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.

94690 compared with similar codes

Office rates for Delaware, from the same CMS release.

94680

Oxygen uptake test

Direct, rest and exercise

$57.14

94690 is limited to oxygen uptake measured at rest by indirect calorimetry. 94680 is for expired-gas analysis that includes additional gas-exchange measurements.

94681

Gas-exchange analysis

CO2 output and derived measures

$49.52

94690 reports resting indirect calorimetry. 94681 is expired-gas analysis that includes calculation of the respiratory quotient.

94621

Exercise test

Cardiopulmonary gas analysis

$164.20

94690 measures oxygen uptake at rest. 94621 is used for cardiopulmonary exercise testing, which evaluates the patient during exertion.

The same code, a different location

How does Delaware compare?

94690 across payment areas

Same release and payment basis · bars start at $0

  1. Delaware · This locality

    $51.79

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

    $61.36

    $9.57 higher than Delaware

  3. Dc + Md/Va Suburbs

    $61.44

    $9.65 higher than Delaware

  4. Miami

    $55.49

    $3.70 higher than Delaware

  5. Chicago

    $53.57

    $1.78 higher than Delaware

  6. Manhattan

    $60.99

    $9.20 higher than Delaware

  7. Alaska*

    $56.52

    $4.73 higher than Delaware

Other payment areas listed in Delaware 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, 94690 ranges from $45.15 in Arkansas to $74.24 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 · 94690

    Office

    $45.97

    Facility

    Unavailable

    $5.82 lower than Delaware for the office setting.

  • Arkansas

    Arkansas · 94690

    Office

    $45.15

    Facility

    Unavailable

    $6.64 lower than Delaware for the office setting.

  • Arizona

    Arizona · 94690

    Office

    $50.81

    Facility

    Unavailable

    $0.98 lower than Delaware for the office setting.

  • Bakersfield

    California · 94690

    Office

    $56.97

    Facility

    Unavailable

    $5.18 higher than Delaware for the office setting.

  • Chico

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • El Centro

    California · 94690

    Office

    $56.92

    Facility

    Unavailable

    $5.13 higher than Delaware for the office setting.

  • Fresno

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Hanford-Corcoran

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Madera

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Merced

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Modesto

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Napa

    California · 94690

    Office

    $67.98

    Facility

    Unavailable

    $16.19 higher than Delaware for the office setting.

  • Oxnard-Thousand Oaks-Ventura

    California · 94690

    Office

    $61.25

    Facility

    Unavailable

    $9.46 higher than Delaware for the office setting.

  • Redding

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Rest Of California

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Riverside-San Bernardino-Ontario

    California · 94690

    Office

    $57.13

    Facility

    Unavailable

    $5.34 higher than Delaware for the office setting.

  • Sacramento-Roseville-Folsom

    California · 94690

    Office

    $60.27

    Facility

    Unavailable

    $8.48 higher than Delaware for the office setting.

  • Salinas

    California · 94690

    Office

    $60.06

    Facility

    Unavailable

    $8.27 higher than Delaware for the office setting.

  • San Diego-Chula Vista-Carlsbad

    California · 94690

    Office

    $61.89

    Facility

    Unavailable

    $10.10 higher than Delaware for the office setting.

  • San Francisco-Oakland-Berkeley (Marin Cnty)

    California · 94690

    Office

    $72.57

    Facility

    Unavailable

    $20.78 higher than Delaware for the office setting.

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

    California · 94690

    Office

    $72.55

    Facility

    Unavailable

    $20.76 higher than Delaware for the office setting.

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

    California · 94690

    Office

    $74.24

    Facility

    Unavailable

    $22.45 higher than Delaware for the office setting.

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

    California · 94690

    Office

    $74.14

    Facility

    Unavailable

    $22.35 higher than Delaware for the office setting.

  • San Luis Obispo-Paso Robles

    California · 94690

    Office

    $59.04

    Facility

    Unavailable

    $7.25 higher than Delaware for the office setting.

  • Santa Cruz-Watsonville

    California · 94690

    Office

    $62.81

    Facility

    Unavailable

    $11.02 higher than Delaware for the office setting.

  • Santa Maria-Santa Barbara

    California · 94690

    Office

    $60.40

    Facility

    Unavailable

    $8.61 higher than Delaware for the office setting.

  • Santa Rosa-Petaluma

    California · 94690

    Office

    $63.47

    Facility

    Unavailable

    $11.68 higher than Delaware for the office setting.

  • Stockton

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Vallejo

    California · 94690

    Office

    $67.95

    Facility

    Unavailable

    $16.16 higher than Delaware for the office setting.

  • Visalia

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Yuba City

    California · 94690

    Office

    $56.91

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Colorado

    Colorado · 94690

    Office

    $55.48

    Facility

    Unavailable

    $3.69 higher than Delaware for the office setting.

  • Connecticut

    Connecticut · 94690

    Office

    $56.43

    Facility

    Unavailable

    $4.64 higher than Delaware for the office setting.

  • Fort Lauderdale

    Florida · 94690

    Office

    $53.62

    Facility

    Unavailable

    $1.83 higher than Delaware for the office setting.

  • Rest Of Florida

    Florida · 94690

    Office

    $50.60

    Facility

    Unavailable

    $1.19 lower than Delaware for the office setting.

  • Atlanta

    Georgia · 94690

    Office

    $53.37

    Facility

    Unavailable

    $1.58 higher than Delaware for the office setting.

  • Rest Of Georgia

    Georgia · 94690

    Office

    $47.23

    Facility

    Unavailable

    $4.56 lower than Delaware for the office setting.

  • Hawaii, Guam

    Hawaii · 94690

    Office

    $58.93

    Facility

    Unavailable

    $7.14 higher than Delaware for the office setting.

  • Iowa

    Iowa · 94690

    Office

    $47.83

    Facility

    Unavailable

    $3.96 lower than Delaware for the office setting.

  • Idaho

    Idaho · 94690

    Office

    $48.13

    Facility

    Unavailable

    $3.66 lower than Delaware for the office setting.

  • East St. Louis

    Illinois · 94690

    Office

    $49.16

    Facility

    Unavailable

    $2.63 lower than Delaware for the office setting.

  • Rest Of Illinois

    Illinois · 94690

    Office

    $48.51

    Facility

    Unavailable

    $3.28 lower than Delaware for the office setting.

  • Suburban Chicago

    Illinois · 94690

    Office

    $54.31

    Facility

    Unavailable

    $2.52 higher than Delaware for the office setting.

  • Indiana

    Indiana · 94690

    Office

    $48.49

    Facility

    Unavailable

    $3.30 lower than Delaware for the office setting.

  • Kansas

    Kansas · 94690

    Office

    $47.36

    Facility

    Unavailable

    $4.43 lower than Delaware for the office setting.

  • Kentucky

    Kentucky · 94690

    Office

    $46.90

    Facility

    Unavailable

    $4.89 lower than Delaware for the office setting.

  • New Orleans

    Louisiana · 94690

    Office

    $49.61

    Facility

    Unavailable

    $2.18 lower than Delaware for the office setting.

  • Rest Of Louisiana

    Louisiana · 94690

    Office

    $46.73

    Facility

    Unavailable

    $5.06 lower than Delaware for the office setting.

  • Metropolitan Boston

    Massachusetts · 94690

    Office

    $62.05

    Facility

    Unavailable

    $10.26 higher than Delaware for the office setting.

  • Rest Of Massachusetts

    Massachusetts · 94690

    Office

    $54.96

    Facility

    Unavailable

    $3.17 higher than Delaware for the office setting.

  • Baltimore/Surr. Cntys

    Maryland · 94690

    Office

    $56.24

    Facility

    Unavailable

    $4.45 higher than Delaware for the office setting.

  • Rest Of Maryland

    Maryland · 94690

    Office

    $53.00

    Facility

    Unavailable

    $1.21 higher than Delaware for the office setting.

  • Rest Of Maine

    Maine · 94690

    Office

    $48.23

    Facility

    Unavailable

    $3.56 lower than Delaware for the office setting.

  • Southern Maine

    Maine · 94690

    Office

    $51.75

    Facility

    Unavailable

    $0.04 lower than Delaware for the office setting.

  • Detroit

    Michigan · 94690

    Office

    $51.17

    Facility

    Unavailable

    $0.62 lower than Delaware for the office setting.

  • Rest Of Michigan

    Michigan · 94690

    Office

    $48.22

    Facility

    Unavailable

    $3.57 lower than Delaware for the office setting.

  • Minnesota

    Minnesota · 94690

    Office

    $53.40

    Facility

    Unavailable

    $1.61 higher than Delaware for the office setting.

  • Metropolitan Kansas City

    Missouri · 94690

    Office

    $49.41

    Facility

    Unavailable

    $2.38 lower than Delaware for the office setting.

  • Metropolitan St. Louis

    Missouri · 94690

    Office

    $50.07

    Facility

    Unavailable

    $1.72 lower than Delaware for the office setting.

  • Rest Of Missouri

    Missouri · 94690

    Office

    $45.60

    Facility

    Unavailable

    $6.19 lower than Delaware for the office setting.

  • Mississippi

    Mississippi · 94690

    Office

    $45.39

    Facility

    Unavailable

    $6.40 lower than Delaware for the office setting.

  • Montana**

    Montana · 94690

    Office

    $52.44

    Facility

    Unavailable

    $0.65 higher than Delaware for the office setting.

  • North Carolina

    North Carolina · 94690

    Office

    $48.89

    Facility

    Unavailable

    $2.90 lower than Delaware for the office setting.

  • North Dakota**

    North Dakota · 94690

    Office

    $52.04

    Facility

    Unavailable

    $0.25 higher than Delaware for the office setting.

  • Nebraska

    Nebraska · 94690

    Office

    $48.22

    Facility

    Unavailable

    $3.57 lower than Delaware for the office setting.

  • New Hampshire

    New Hampshire · 94690

    Office

    $54.38

    Facility

    Unavailable

    $2.59 higher than Delaware for the office setting.

  • Northern Nj

    New Jersey · 94690

    Office

    $60.54

    Facility

    Unavailable

    $8.75 higher than Delaware for the office setting.

  • Rest Of New Jersey

    New Jersey · 94690

    Office

    $57.15

    Facility

    Unavailable

    $5.36 higher than Delaware for the office setting.

  • New Mexico

    New Mexico · 94690

    Office

    $48.47

    Facility

    Unavailable

    $3.32 lower than Delaware for the office setting.

  • Nevada**

    Nevada · 94690

    Office

    $52.38

    Facility

    Unavailable

    $0.59 higher than Delaware for the office setting.

  • Nyc Suburbs/Long Island

    New York · 94690

    Office

    $62.50

    Facility

    Unavailable

    $10.71 higher than Delaware for the office setting.

  • Poughkpsie/N Nyc Suburbs

    New York · 94690

    Office

    $57.38

    Facility

    Unavailable

    $5.59 higher than Delaware for the office setting.

  • Queens

    New York · 94690

    Office

    $61.88

    Facility

    Unavailable

    $10.09 higher than Delaware for the office setting.

  • Rest Of New York

    New York · 94690

    Office

    $49.77

    Facility

    Unavailable

    $2.02 lower than Delaware for the office setting.

  • Ohio

    Ohio · 94690

    Office

    $48.14

    Facility

    Unavailable

    $3.65 lower than Delaware for the office setting.

  • Oklahoma

    Oklahoma · 94690

    Office

    $47.00

    Facility

    Unavailable

    $4.79 lower than Delaware for the office setting.

  • Portland

    Oregon · 94690

    Office

    $57.79

    Facility

    Unavailable

    $6.00 higher than Delaware for the office setting.

  • Rest Of Oregon

    Oregon · 94690

    Office

    $52.04

    Facility

    Unavailable

    $0.25 higher than Delaware for the office setting.

  • Metropolitan Philadelphia

    Pennsylvania · 94690

    Office

    $54.64

    Facility

    Unavailable

    $2.85 higher than Delaware for the office setting.

  • Rest Of Pennsylvania

    Pennsylvania · 94690

    Office

    $48.35

    Facility

    Unavailable

    $3.44 lower than Delaware for the office setting.

  • Puerto Rico

    Puerto Rico · 94690

    Office

    $52.97

    Facility

    Unavailable

    $1.18 higher than Delaware for the office setting.

  • Rhode Island

    Rhode Island · 94690

    Office

    $54.04

    Facility

    Unavailable

    $2.25 higher than Delaware for the office setting.

  • South Carolina

    South Carolina · 94690

    Office

    $48.58

    Facility

    Unavailable

    $3.21 lower than Delaware for the office setting.

  • South Dakota**

    South Dakota · 94690

    Office

    $52.00

    Facility

    Unavailable

    $0.21 higher than Delaware for the office setting.

  • Tennessee

    Tennessee · 94690

    Office

    $47.63

    Facility

    Unavailable

    $4.16 lower than Delaware for the office setting.

  • Austin

    Texas · 94690

    Office

    $55.24

    Facility

    Unavailable

    $3.45 higher than Delaware for the office setting.

  • Beaumont

    Texas · 94690

    Office

    $47.94

    Facility

    Unavailable

    $3.85 lower than Delaware for the office setting.

  • Brazoria

    Texas · 94690

    Office

    $51.87

    Facility

    Unavailable

    $0.08 higher than Delaware for the office setting.

  • Dallas

    Texas · 94690

    Office

    $52.17

    Facility

    Unavailable

    $0.38 higher than Delaware for the office setting.

  • Fort Worth

    Texas · 94690

    Office

    $51.68

    Facility

    Unavailable

    $0.11 lower than Delaware for the office setting.

  • Galveston

    Texas · 94690

    Office

    $52.00

    Facility

    Unavailable

    $0.21 higher than Delaware for the office setting.

  • Houston

    Texas · 94690

    Office

    $52.36

    Facility

    Unavailable

    $0.57 higher than Delaware for the office setting.

  • Rest Of Texas

    Texas · 94690

    Office

    $49.85

    Facility

    Unavailable

    $1.94 lower than Delaware for the office setting.

  • Utah

    Utah · 94690

    Office

    $49.41

    Facility

    Unavailable

    $2.38 lower than Delaware for the office setting.

  • Virginia

    Virginia · 94690

    Office

    $51.40

    Facility

    Unavailable

    $0.39 lower than Delaware for the office setting.

  • Virgin Islands

    United States Virgin Islands · 94690

    Office

    $52.97

    Facility

    Unavailable

    $1.18 higher than Delaware for the office setting.

  • Vermont

    Vermont · 94690

    Office

    $51.62

    Facility

    Unavailable

    $0.17 lower than Delaware for the office setting.

  • Rest Of Washington

    Washington · 94690

    Office

    $54.93

    Facility

    Unavailable

    $3.14 higher than Delaware for the office setting.

  • Seattle (King Cnty)

    Washington · 94690

    Office

    $63.66

    Facility

    Unavailable

    $11.87 higher than Delaware for the office setting.

  • Wisconsin

    Wisconsin · 94690

    Office

    $49.90

    Facility

    Unavailable

    $1.89 lower than Delaware for the office setting.

  • West Virginia

    West Virginia · 94690

    Office

    $46.25

    Facility

    Unavailable

    $5.54 lower than Delaware for the office setting.

  • Wyoming**

    Wyoming · 94690

    Office

    $52.27

    Facility

    Unavailable

    $0.48 higher than Delaware for the office setting.

See how rates vary across the country

94690 · 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.

$45.15

$65.57

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

View all state and territory rates as a table
State / territoryRate rangeLocalities
AK$56.521
AL$45.971
AR$45.151
AZ$50.811
CA$56.91–$74.2429
CO$55.481
CT$56.431
DC$61.441
DE$51.791
FL$50.60–$55.493
GA$47.23–$53.372
GU$58.931
HI$58.931
IA$47.831
ID$48.131
IL$48.51–$54.314
IN$48.491
KS$47.361
KY$46.901
LA$46.73–$49.612
MA$54.96–$62.052
MD$53.00–$61.443
ME$48.23–$51.752
MI$48.22–$51.172
MN$53.401
MO$45.60–$50.073
MS$45.391
MT$52.441
NC$48.891
ND$52.041
NE$48.221
NH$54.381
NJ$57.15–$60.542
NM$48.471
NV$52.381
NY$49.77–$62.505
OH$48.141
OK$47.001
OR$52.04–$57.792
PA$48.35–$54.642
PR$52.971
RI$54.041
SC$48.581
SD$52.001
TN$47.631
TX$47.94–$55.248
UT$49.411
VA$51.40–$61.442
VI$52.971
VT$51.621
WA$54.93–$63.662
WI$49.901
WV$46.251
WY$52.271

Explore 94690 on the national rate map →

Where does this rate apply?

Delaware is a Medicare payment area. Our Census mapping connects it to 79 cities and communities in Delaware, 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 Delaware →

Use this rate

What is a percentage of Medicare worth?

Turn a percentage into dollars for 94690 in Delaware. This uses the base rate on this page, so the locality and release stay consistent.

Reference amount per service

$56.97

$51.79 × 110% = $56.97

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 94690 in Delaware.

PPRRVU2026_Oct_nonQPP.csv

12,427

Code
94690
Physician work
0.07
Practice expense
1.48
Malpractice
0.02

GPCI2026.csv

40

Locality
Delaware
Physician work
1.005
Practice expense
0.988
Malpractice
0.899
Office / nonfacility calculation for 94690 in Delaware
ComponentRVULocality factorAdjusted
Physician work0.07× 1.0050.0703
Practice expense1.48× 0.9881.4622
Malpractice0.02× 0.8990.0180
Total RVUs1.5506
Conversion factor× 33.4009

Office / nonfacility rate, Delaware$51.79

Open 94690 in the RVU calculator →

Explore RVUs, geographic factors and the full formula

Office / nonfacility

Office / nonfacility calculation inputs
ComponentRVULocal GPCI
Work0.071.005
Practice expense1.480.988
Malpractice0.020.899

(0.07 × 1.005 + 1.48 × 0.988 + 0.02 × 0.899) × $33.4009 = $51.79

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

94690 · Office / nonfacility

$51.79

Effective 2026-10-01

The base rate is $5.25 higher than on 2025-10-01, moving from $46.54 to $51.79 (11.3%).

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

    $46.54changed to$51.79

    • Conversion factor 32.3465 changed to 33.4009
    • Practice expense RVU 1.36 changed to 1.48
    • Work GPCI 1.009 changed to 1.005
    • Practice expense GPCI 0.992 changed to 0.988
    • Malpractice GPCI 0.949 changed to 0.899

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    Earliest loaded release: $46.54

    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$51.79Not available in this settingRVU26D
2026-07-01$51.79Not available in this settingRVU26C
2026-04-01$51.79Not available in this settingRVU26B
2026-01-01$51.79Not available in this settingRVU26A
2025-10-01$46.54Not available in this settingRVU25D
2025-07-01$46.54Not available in this settingRVU25C
2025-04-01$46.54Not available in this settingRVU25B
2025-01-01$46.54Not available in this settingRVU25A

94690 billing questions

When should 94690 be chosen instead of 94680?

Use 94690 for oxygen uptake measured at rest by indirect calorimetry. Code 94680 describes expired-gas analysis with a broader set of measurements.

How does 94690 differ from 94681?

94690 is specifically for resting oxygen uptake by indirect calorimetry. Code 94681 includes expired-gas analysis with calculation of the respiratory quotient.

Can the professional and technical portions be billed separately?

Yes. Modifier 26 identifies the interpretation, and modifier TC identifies the equipment and staff portion. Billing without either modifier represents the global service.

What documentation supports reporting 94690?

Document the clinical reason for measuring resting energy expenditure, that the patient was tested at rest, the measured findings, and the interpretation.

Is this code for a pulmonary exercise test?

No. 94690 reports resting oxygen uptake by indirect calorimetry; exercise-based pulmonary or cardiopulmonary testing is reported with a different code.

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 94690PPRRVU2026_Oct_nonQPP.csv, line 12,427 (RVU26D)
Geographic factors for DelawareGPCI2026.csv, line 40 (RVU26D)
Open CMS sourceHow this rate is calculatedBuild a fee sheet