CPT code 94375: Flow-volume loop, respiratory tracing2026 Medicare rate & RVUs in Colorado
Reports a respiratory test that plots airflow against lung volume during breathing maneuvers, helping assess airflow patterns in pulmonary evaluation.
In Colorado, Medicare pays $44.07 for 94375 in the office.
Check a contract rate as a % of Medicare · 94375 nationwide
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 11 sections
What 94375 covers
During this pulmonary function test, the patient performs breathing maneuvers while equipment records airflow in relation to lung volume, producing a flow-volume tracing. Pulmonary function laboratories, hospital departments, and office-based respiratory practices commonly perform the test, with a respiratory therapist or other trained staff member coaching the maneuvers. Clinicians use the tracing to assess airflow patterns, including patterns that may suggest obstruction in the upper airway.
Report 94375 when the flow-volume loop test is performed and documented, rather than selecting it solely because a loop image appears in a broader pulmonary function report. The record should support the maneuver performed and the resulting tracing; the interpreting clinician’s findings support the professional service. CMS recognizes professional and technical components: modifier 26 identifies interpretation, modifier TC identifies equipment and staff, and reporting without either modifier represents the global service.
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.
How Colorado compares for 94375
Across 109 of 109 payment localities, the office rate for 94375 runs from $37.33 in Arkansas to $56.75 in San Benito County, CA. Colorado pays $44.07. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Colorado · this page$44.07
- Los Angeles, CA · California$48.02+$3.95
- Washington, DC area · District of Columbia$48.29+$4.22
- Miami, FL · Florida$44.39+$0.32
- Chicago, IL · Illinois$43.18−$0.89
- Manhattan, NY · New York$48.20+$4.13
- Alaska · Alaska$48.84+$4.77
Other areas in Colorado first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $37.87 | — |
| ArkansasArkansas | $37.33 | — |
| ArizonaArizona | $41.02 | — |
| Bakersfield, CACalifornia | $45.03 | — |
| Chico, CACalifornia | $44.96 | — |
| El Centro, CACalifornia | $44.96 | — |
| Fresno, CACalifornia | $44.96 | — |
| Hanford, CACalifornia | $44.96 | — |
| Madera, CACalifornia | $44.96 | — |
| Merced, CACalifornia | $44.96 | — |
| Modesto, CACalifornia | $44.96 | — |
| Napa, CACalifornia | $52.37 | — |
| Oxnard, CACalifornia | $47.83 | — |
| Redding, CACalifornia | $44.96 | — |
| Rest of CaliforniaCalifornia | $44.96 | — |
| Riverside, CACalifornia | $45.18 | — |
| Sacramento, CACalifornia | $47.25 | — |
| Salinas, CACalifornia | $47.08 | — |
| San Diego, CACalifornia | $48.23 | — |
| Marin County, CACalifornia | $55.55 | — |
| San Francisco, CACalifornia | $55.53 | — |
| San Benito County, CACalifornia | $56.75 | — |
| Santa Clara County, CACalifornia | $56.66 | — |
| San Luis Obispo, CACalifornia | $46.31 | — |
| Santa Cruz, CACalifornia | $48.74 | — |
| Santa Maria, CACalifornia | $47.27 | — |
| Santa Rosa, CACalifornia | $49.23 | — |
| Stockton, CACalifornia | $44.96 | — |
| Vallejo, CACalifornia | $52.34 | — |
| Visalia, CACalifornia | $44.96 | — |
| Yuba City, CACalifornia | $44.96 | — |
| ConnecticutConnecticut | $44.84 | — |
| DelawareDelaware | $41.69 | — |
| Fort Lauderdale, FLFlorida | $43.03 | — |
| Rest of FloridaFlorida | $41.04 | — |
| Atlanta, GAGeorgia | $42.75 | — |
| Rest of GeorgiaGeorgia | $38.82 | — |
| Hawaii, Guam, HIHawaii | $46.11 | — |
| IowaIowa | $39.01 | — |
| IdahoIdaho | $39.22 | — |
| East St. Louis, ILIllinois | $40.25 | — |
| Rest of IllinoisIllinois | $39.73 | — |
| Suburban Chicago, ILIllinois | $43.52 | — |
| IndianaIndiana | $39.45 | — |
| KansasKansas | $38.74 | — |
| KentuckyKentucky | $38.54 | — |
| New Orleans, LALouisiana | $40.32 | — |
| Rest of LouisianaLouisiana | $38.45 | — |
| Metropolitan Boston, MAMassachusetts | $48.51 | — |
| Rest of MassachusettsMassachusetts | $43.77 | — |
| Baltimore area, MDMaryland | $44.70 | — |
| Rest of MarylandMaryland | $42.51 | — |
| Rest of MaineMaine | $39.32 | — |
| Southern Maine, MEMaine | $41.56 | — |
| Detroit, MIMichigan | $41.44 | — |
| Rest of MichiganMichigan | $39.44 | — |
| MinnesotaMinnesota | $42.53 | — |
| Metropolitan Kansas City, MOMissouri | $40.15 | — |
| Metropolitan St. Louis, MOMissouri | $40.58 | — |
| Rest of MissouriMissouri | $37.74 | — |
| MississippiMississippi | $37.55 | — |
| MontanaMontana | $42.08 | — |
| North CarolinaNorth Carolina | $39.74 | — |
| North DakotaNorth Dakota | $41.69 | — |
| NebraskaNebraska | $39.25 | — |
| New HampshireNew Hampshire | $43.29 | — |
| Northern New JerseyNew Jersey | $47.79 | — |
| Rest of New JerseyNew Jersey | $45.44 | — |
| New MexicoNew Mexico | $39.61 | — |
| NevadaNevada | $42.00 | — |
| NYC suburbs and Long Island, NYNew York | $49.23 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $45.66 | — |
| Queens, NYNew York | $48.74 | — |
| Rest of New YorkNew York | $40.32 | — |
| OhioOhio | $39.36 | — |
| OklahomaOklahoma | $38.58 | — |
| Portland, OROregon | $45.56 | — |
| Rest of OregonOregon | $41.76 | — |
| Metropolitan Philadelphia, PAPennsylvania | $43.68 | — |
| Rest of PennsylvaniaPennsylvania | $39.47 | — |
| Puerto RicoPuerto Rico | $42.42 | — |
| Rhode IslandRhode Island | $43.24 | — |
| South CarolinaSouth Carolina | $39.60 | — |
| South DakotaSouth Dakota | $41.64 | — |
| TennesseeTennessee | $38.92 | — |
| Austin, TXTexas | $43.85 | — |
| Beaumont, TXTexas | $39.21 | — |
| Brazoria, TXTexas | $41.74 | — |
| Dallas, TXTexas | $41.95 | — |
| Fort Worth, TXTexas | $41.65 | — |
| Galveston, TXTexas | $41.83 | — |
| Houston, TXTexas | $42.20 | — |
| Rest of TexasTexas | $40.42 | — |
| UtahUtah | $40.13 | — |
| VirginiaVirginia | $41.35 | — |
| Virgin Islands, VIUnited States Virgin Islands | $42.42 | — |
| VermontVermont | $41.44 | — |
| Rest of WashingtonWashington | $43.72 | — |
| King County, WAWashington | $49.59 | — |
| WisconsinWisconsin | $40.30 | — |
| West VirginiaWest Virginia | $38.26 | — |
| WyomingWyoming | $41.91 | — |
94375 rates by state
Office rate range in each state. Select a state to see its payment localities.
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.
$37.33
$50.86
Color shows the midpoint of each state’s locality range.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | $48.84 | 1 |
| AL | $37.87 | 1 |
| AR | $37.33 | 1 |
| AZ | $41.02 | 1 |
| CA | $44.96–$56.75 | 29 |
| CO | $44.07 | 1 |
| CT | $44.84 | 1 |
| DC | $48.29 | 1 |
| DE | $41.69 | 1 |
| FL | $41.04–$44.39 | 3 |
| GA | $38.82–$42.75 | 2 |
| GU | $46.11 | 1 |
| HI | $46.11 | 1 |
| IA | $39.01 | 1 |
| ID | $39.22 | 1 |
| IL | $39.73–$43.52 | 4 |
| IN | $39.45 | 1 |
| KS | $38.74 | 1 |
| KY | $38.54 | 1 |
| LA | $38.45–$40.32 | 2 |
| MA | $43.77–$48.51 | 2 |
| MD | $42.51–$48.29 | 3 |
| ME | $39.32–$41.56 | 2 |
| MI | $39.44–$41.44 | 2 |
| MN | $42.53 | 1 |
| MO | $37.74–$40.58 | 3 |
| MS | $37.55 | 1 |
| MT | $42.08 | 1 |
| NC | $39.74 | 1 |
| ND | $41.69 | 1 |
| NE | $39.25 | 1 |
| NH | $43.29 | 1 |
| NJ | $45.44–$47.79 | 2 |
| NM | $39.61 | 1 |
| NV | $42.00 | 1 |
| NY | $40.32–$49.23 | 5 |
| OH | $39.36 | 1 |
| OK | $38.58 | 1 |
| OR | $41.76–$45.56 | 2 |
| PA | $39.47–$43.68 | 2 |
| PR | $42.42 | 1 |
| RI | $43.24 | 1 |
| SC | $39.60 | 1 |
| SD | $41.64 | 1 |
| TN | $38.92 | 1 |
| TX | $39.21–$43.85 | 8 |
| UT | $40.13 | 1 |
| VA | $41.35–$48.29 | 2 |
| VI | $42.42 | 1 |
| VT | $41.44 | 1 |
| WA | $43.72–$49.59 | 2 |
| WI | $40.30 | 1 |
| WV | $38.26 | 1 |
| WY | $41.91 | 1 |
How the 94375 rate is calculated
Each of 94375’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 94375
RVUs × geographic indexes × conversion factor
Work0.30
0.30 RVUs× 1.000 GPCI
Practice expense0.94
0.94 RVUs× 1.000 GPCI
Malpractice0.02
0.02 RVUs× 1.000 GPCI
Adjusted RVUs
1.2600
Conversion factor
$33.4009
Medicare rate
$42.09
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Colorado inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
12,385
- Code
- 94375
- Physician work
- 0.30
- Practice expense
- 0.94
- Malpractice
- 0.02
GPCI2026.csv
37
- Locality
- Colorado
- Physician work
- 1.012
- Practice expense
- 1.064
- Malpractice
- 0.781
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.30 | × 1.012 | 0.3036 |
| Practice expense | 0.94 | × 1.064 | 1.0002 |
| Malpractice | 0.02 | × 0.781 | 0.0156 |
| Total RVUs | 1.3194 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Colorado$44.07
Office: (0.3 × 1.012 + 0.94 × 1.064 + 0.02 × 0.781) × $33.4009 = $44.07
Payment rules and modifiers for 94375
The CMS indicators that decide how 94375 is paid alongside other services.
CMS payment indicators · 94375
Flow-volume loop, respiratory tracing
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
94375 without 26 · national office
$42.09
Flow-volume loop, respiratory tracing
94375-26 · Professional component
$14.36
Pays only the interpretation and report.
How 94375 has changed in Colorado
94375 · Office / nonfacility
$44.07
Effective 2026-10-01
The base rate is $4.82 higher than on 2025-10-01, moving from $39.25 to $44.07 (12.3%).
It is unchanged from the immediately preceding available release, effective 2026-07-01.
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
January 1, 2026
RVU26A
$39.25changed to$44.07
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.31 changed to 0.30
- Practice expense RVU 0.84 changed to 0.94
- Work GPCI 1.008 changed to 1.012
- Practice expense GPCI 1.053 changed to 1.064
- Malpractice GPCI 0.827 changed to 0.781
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$40.40changed to$39.25
- Conversion factor 33.2875 changed to 32.3465
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$39.74changed to$40.40
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$39.92changed to$39.74
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 0.81 changed to 0.84
- Work GPCI 1.005 changed to 1.008
- Practice expense GPCI 1.050 changed to 1.053
- Malpractice GPCI 0.797 changed to 0.827
January 1, 2023
RVU23A
$40.26changed to$39.92
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 0.80 changed to 0.81
- Work GPCI 1.001 changed to 1.005
- Practice expense GPCI 1.047 changed to 1.050
- Malpractice GPCI 0.767 changed to 0.797
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$40.59changed to$40.26
- Conversion factor 34.8931 changed to 34.6062
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$40.55changed to$40.59
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 0.77 changed to 0.80
- Work GPCI 1.000 changed to 1.001
- Practice expense GPCI 1.033 changed to 1.047
- Malpractice GPCI 0.905 changed to 0.767
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$40.91changed to$40.55
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 0.79 changed to 0.77
- Practice expense GPCI 1.018 changed to 1.033
- Malpractice GPCI 1.042 changed to 0.905
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$41.23changed to$40.91
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 0.80 changed to 0.79
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$40.67changed to$41.23
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 0.79 changed to 0.80
- Practice expense GPCI 1.015 changed to 1.018
- Malpractice GPCI 1.066 changed to 1.042
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$40.11changed to$40.67
- Conversion factor 35.8043 changed to 35.8887
- Practice expense RVU 0.78 changed to 0.79
- Practice expense GPCI 1.011 changed to 1.015
- Malpractice GPCI 1.090 changed to 1.066
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$40.26changed to$40.11
- Conversion factor 35.9335 changed to 35.8043
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$40.06changed to$40.26
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$39.61changed to$40.06
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 0.77 changed to 0.78
- Practice expense GPCI 1.008 changed to 1.011
- Malpractice GPCI 0.981 changed to 1.090
Held through RVU15B.
January 1, 2014
RVU14A
$40.52changed to$39.61
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 0.86 changed to 0.77
- Practice expense GPCI 1.004 changed to 1.008
- Malpractice GPCI 0.872 changed to 0.981
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $40.52
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $44.07 | Not available in this setting | RVU26D |
| 2026-07-01 | $44.07 | Not available in this setting | RVU26C |
| 2026-04-01 | $44.07 | Not available in this setting | RVU26B |
| 2026-01-01 | $44.07 | Not available in this setting | RVU26A |
| 2025-10-01 | $39.25 | Not available in this setting | RVU25D |
| 2025-07-01 | $39.25 | Not available in this setting | RVU25C |
| 2025-04-01 | $39.25 | Not available in this setting | RVU25B |
| 2025-01-01 | $39.25 | Not available in this setting | RVU25A |
| 2024-10-01 | $40.40 | Not available in this setting | RVU24D |
| 2024-07-01 | $40.40 | Not available in this setting | RVU24C |
| 2024-04-01 | $40.40 | Not available in this setting | RVU24B |
| 2024-03-09 | $40.40 | Not available in this setting | RVU24AR |
| 2024-01-01 | $39.74 | Not available in this setting | RVU24A |
| 2023-10-01 | $39.92 | Not available in this setting | RVU23D |
| 2023-07-01 | $39.92 | Not available in this setting | RVU23C |
| 2023-04-01 | $39.92 | Not available in this setting | RVU23B |
| 2023-01-01 | $39.92 | Not available in this setting | RVU23A |
| 2022-10-01 | $40.26 | Not available in this setting | RVU22D |
| 2022-07-01 | $40.26 | Not available in this setting | RVU22C |
| 2022-04-01 | $40.26 | Not available in this setting | RVU22B |
| 2022-01-01 | $40.26 | Not available in this setting | RVU22A |
| 2021-10-01 | $40.59 | Not available in this setting | RVU21D |
| 2021-07-01 | $40.59 | Not available in this setting | RVU21C |
| 2021-04-01 | $40.59 | Not available in this setting | RVU21B |
| 2021-01-01 | $40.59 | Not available in this setting | RVU21A |
| 2020-10-01 | $40.55 | Not available in this setting | RVU20D |
| 2020-07-01 | $40.55 | Not available in this setting | RVU20C |
| 2020-04-01 | $40.55 | Not available in this setting | RVU20B |
| 2020-01-01 | $40.55 | Not available in this setting | RVU20A |
| 2019-10-01 | $40.91 | Not available in this setting | RVU19D |
| 2019-07-01 | $40.91 | Not available in this setting | RVU19C |
| 2019-04-01 | $40.91 | Not available in this setting | RVU19B |
| 2019-01-01 | $40.91 | Not available in this setting | RVU19A |
| 2018-10-01 | $41.23 | Not available in this setting | RVU18D |
| 2018-07-01 | $41.23 | Not available in this setting | RVU18C |
| 2018-04-01 | $41.23 | Not available in this setting | RVU18B |
| 2018-01-01 | $41.23 | Not available in this setting | RVU18AR1 |
| 2017-10-01 | $40.67 | Not available in this setting | RVU17D |
| 2017-07-01 | $40.67 | Not available in this setting | RVU17C |
| 2017-04-01 | $40.67 | Not available in this setting | RVU17B |
| 2017-01-01 | $40.67 | Not available in this setting | RVU17A |
| 2016-10-01 | $40.11 | Not available in this setting | RVU16D |
| 2016-07-01 | $40.11 | Not available in this setting | RVU16C |
| 2016-04-01 | $40.11 | Not available in this setting | RVU16B |
| 2016-01-01 | $40.11 | Not available in this setting | RVU16A |
| 2015-10-01 | $40.26 | Not available in this setting | RVU15D |
| 2015-07-01 | $40.26 | Not available in this setting | RVU15C |
| 2015-04-01 | $40.06 | Not available in this setting | RVU15B |
| 2015-01-01 | $40.06 | Not available in this setting | RVU15A |
| 2014-10-01 | $39.61 | Not available in this setting | RVU14D |
| 2014-07-01 | $39.61 | Not available in this setting | RVU14C |
| 2014-04-01 | $39.61 | Not available in this setting | RVU14B |
| 2014-01-01 | $39.61 | Not available in this setting | RVU14A |
| 2013-10-01 | $40.52 | Not available in this setting | RVU13D |
| 2013-07-01 | $40.52 | Not available in this setting | RVU13C |
| 2013-04-01 | $40.52 | Not available in this setting | RVU13B |
| 2013-01-01 | $40.52 | Not available in this setting | RVU13AR |
Where the Colorado rate applies
Colorado is a Medicare payment area, not a city. Our Census mapping connects it to 485 cities and communities in Colorado. Some span more than one payment area; confirm with the service ZIP.
- Acres Green
- Aetna Estates
- Aguilar
- Air Force Academy
- Akron
- Alamosa
- Alamosa East
- Allenspark
94375 billing questions
How does 94375 differ from 94010?
94375 represents a flow-volume loop tracing. 94010 represents spirometric testing; choose based on the service performed and documented, not simply the format of a report.
Can 94375 and 94010 be reported together?
A loop image alone does not establish that a separate spirometry service was performed. Documentation should identify each service being reported.
When should modifier 26 or TC be used?
Use modifier 26 for the professional interpretation and modifier TC for the technical service, including equipment and staff. Without either modifier, the claim represents the global service.
What documentation supports 94375?
Document the breathing maneuvers, the resulting flow-volume tracing, and the interpreting clinician’s findings when the professional component is 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 indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
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