CPT code 94729: Diffusing capacity (DLCO), add-on to pulmonary function testing2026 Medicare rate & RVUs in New Mexico
Add-on code for measuring the lungs’ carbon monoxide diffusing capacity, reported with an eligible primary pulmonary function test during the same session.
In New Mexico, Medicare pays $58.91 for 94729 in the office.
Check a contract rate as a % of Medicare · 94729 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 94729 covers
Diffusing capacity testing evaluates gas transfer from the alveoli into pulmonary capillary blood. In the common single-breath method, the patient inhales a small amount of carbon monoxide with a tracer gas, holds the breath briefly, then exhales into an analyzer. Pulmonologists order it to assess interstitial lung disease, emphysema, pulmonary hypertension, amiodarone toxicity, or fitness for lung resection. Respiratory therapists and PFT technologists perform it in pulmonary offices or hospital labs; a physician interprets the result, sometimes adjusted for hemoglobin.
Report 94729 once per testing session with an eligible primary PFT code, such as spirometry (94010 or 94060), lung volumes (94726 or 94727), oscillometry (94728), bronchospasm provocation (94070), or flow-volume testing (94375). Repeat maneuvers for test quality remain within that unit. Document the measured capacity, test quality, any hemoglobin adjustment, and an interpretation when billing the professional service. CMS pays this add-on within the primary procedure’s global period. Modifier 26 identifies the professional interpretation; modifier TC identifies equipment and staff work. Bill without a component modifier when the same entity provides both components.
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 New Mexico compares for 94729
Across 109 of 109 payment localities, the office rate for 94729 runs from $55.18 in Arkansas to $88.80 in San Benito County, CA. New Mexico pays $58.91. The RVUs are the same everywhere; the geographic indexes change the dollars.
- New Mexico · this page$58.91
- Los Angeles, CA · California$73.83+$14.92
- Washington, DC area · District of Columbia$73.93+$15.02
- Miami, FL · Florida$66.80+$7.89
- Chicago, IL · Illinois$64.65+$5.74
- Manhattan, NY · New York$73.40+$14.49
- Alaska · Alaska$70.00+$11.09
Other areas in New Mexico first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $56.12 | — |
| ArkansasArkansas | $55.18 | — |
| ArizonaArizona | $61.62 | — |
| Bakersfield, CACalifornia | $68.74 | — |
| Chico, CACalifornia | $68.68 | — |
| El Centro, CACalifornia | $68.68 | — |
| Fresno, CACalifornia | $68.68 | — |
| Hanford, CACalifornia | $68.68 | — |
| Madera, CACalifornia | $68.68 | — |
| Merced, CACalifornia | $68.68 | — |
| Modesto, CACalifornia | $68.68 | — |
| Napa, CACalifornia | $81.48 | — |
| Oxnard, CACalifornia | $73.66 | — |
| Redding, CACalifornia | $68.68 | — |
| Rest of CaliforniaCalifornia | $68.68 | — |
| Riverside, CACalifornia | $68.90 | — |
| Sacramento, CACalifornia | $72.58 | — |
| Salinas, CACalifornia | $72.32 | — |
| San Diego, CACalifornia | $74.41 | — |
| Marin County, CACalifornia | $86.85 | — |
| San Francisco, CACalifornia | $86.82 | — |
| San Benito County, CACalifornia | $88.80 | — |
| Santa Clara County, CACalifornia | $88.71 | — |
| San Luis Obispo, CACalifornia | $71.11 | — |
| Santa Cruz, CACalifornia | $75.42 | — |
| Santa Maria, CACalifornia | $72.70 | — |
| Santa Rosa, CACalifornia | $76.21 | — |
| Stockton, CACalifornia | $68.68 | — |
| Vallejo, CACalifornia | $81.45 | — |
| Visalia, CACalifornia | $68.68 | — |
| Yuba City, CACalifornia | $68.68 | — |
| ColoradoColorado | $67.00 | — |
| ConnecticutConnecticut | $68.08 | — |
| DelawareDelaware | $62.75 | — |
| Fort Lauderdale, FLFlorida | $64.74 | — |
| Rest of FloridaFlorida | $61.31 | — |
| Atlanta, GAGeorgia | $64.52 | — |
| Rest of GeorgiaGeorgia | $57.49 | — |
| Hawaii, Guam, HIHawaii | $70.91 | — |
| IowaIowa | $58.26 | — |
| IdahoIdaho | $58.59 | — |
| East St. Louis, ILIllinois | $59.62 | — |
| Rest of IllinoisIllinois | $58.93 | — |
| Suburban Chicago, ILIllinois | $65.55 | — |
| IndianaIndiana | $59.00 | — |
| KansasKansas | $57.71 | — |
| KentuckyKentucky | $57.14 | — |
| New Orleans, LALouisiana | $60.22 | — |
| Rest of LouisianaLouisiana | $56.94 | — |
| Metropolitan Boston, MAMassachusetts | $74.60 | — |
| Rest of MassachusettsMassachusetts | $66.42 | — |
| Baltimore area, MDMaryland | $67.84 | — |
| Rest of MarylandMaryland | $64.15 | — |
| Rest of MaineMaine | $58.69 | — |
| Southern Maine, MEMaine | $62.71 | — |
| Detroit, MIMichigan | $61.94 | — |
| Rest of MichiganMichigan | $58.64 | — |
| MinnesotaMinnesota | $64.63 | — |
| Metropolitan Kansas City, MOMissouri | $60.00 | — |
| Metropolitan St. Louis, MOMissouri | $60.75 | — |
| Rest of MissouriMissouri | $55.65 | — |
| MississippiMississippi | $55.44 | — |
| MontanaMontana | $63.46 | — |
| North CarolinaNorth Carolina | $59.44 | — |
| North DakotaNorth Dakota | $63.06 | — |
| NebraskaNebraska | $58.70 | — |
| New HampshireNew Hampshire | $65.69 | — |
| Northern New JerseyNew Jersey | $72.94 | — |
| Rest of New JerseyNew Jersey | $68.97 | — |
| NevadaNevada | $63.41 | — |
| NYC suburbs and Long Island, NYNew York | $75.11 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $69.25 | — |
| Queens, NYNew York | $74.44 | — |
| Rest of New YorkNew York | $60.44 | — |
| OhioOhio | $58.56 | — |
| OklahomaOklahoma | $57.27 | — |
| Portland, OROregon | $69.66 | — |
| Rest of OregonOregon | $63.04 | — |
| Metropolitan Philadelphia, PAPennsylvania | $66.02 | — |
| Rest of PennsylvaniaPennsylvania | $58.80 | — |
| Puerto RicoPuerto Rico | $64.07 | — |
| Rhode IslandRhode Island | $65.37 | — |
| South CarolinaSouth Carolina | $59.07 | — |
| South DakotaSouth Dakota | $63.02 | — |
| TennesseeTennessee | $58.02 | — |
| Austin, TXTexas | $66.67 | — |
| Beaumont, TXTexas | $58.33 | — |
| Brazoria, TXTexas | $62.86 | — |
| Dallas, TXTexas | $63.20 | — |
| Fort Worth, TXTexas | $62.64 | — |
| Galveston, TXTexas | $63.00 | — |
| Houston, TXTexas | $63.37 | — |
| Rest of TexasTexas | $60.52 | — |
| UtahUtah | $60.01 | — |
| VirginiaVirginia | $62.31 | — |
| Virgin Islands, VIUnited States Virgin Islands | $64.07 | — |
| VermontVermont | $62.57 | — |
| Rest of WashingtonWashington | $66.38 | — |
| King County, WAWashington | $76.47 | — |
| WisconsinWisconsin | $60.63 | — |
| West VirginiaWest Virginia | $56.36 | — |
| WyomingWyoming | $63.29 | — |
94729 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.
$55.18
$78.74
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 | $70.00 | 1 |
| AL | $56.12 | 1 |
| AR | $55.18 | 1 |
| AZ | $61.62 | 1 |
| CA | $68.68–$88.80 | 29 |
| CO | $67.00 | 1 |
| CT | $68.08 | 1 |
| DC | $73.93 | 1 |
| DE | $62.75 | 1 |
| FL | $61.31–$66.80 | 3 |
| GA | $57.49–$64.52 | 2 |
| GU | $70.91 | 1 |
| HI | $70.91 | 1 |
| IA | $58.26 | 1 |
| ID | $58.59 | 1 |
| IL | $58.93–$65.55 | 4 |
| IN | $59.00 | 1 |
| KS | $57.71 | 1 |
| KY | $57.14 | 1 |
| LA | $56.94–$60.22 | 2 |
| MA | $66.42–$74.60 | 2 |
| MD | $64.15–$73.93 | 3 |
| ME | $58.69–$62.71 | 2 |
| MI | $58.64–$61.94 | 2 |
| MN | $64.63 | 1 |
| MO | $55.65–$60.75 | 3 |
| MS | $55.44 | 1 |
| MT | $63.46 | 1 |
| NC | $59.44 | 1 |
| ND | $63.06 | 1 |
| NE | $58.70 | 1 |
| NH | $65.69 | 1 |
| NJ | $68.97–$72.94 | 2 |
| NM | $58.91 | 1 |
| NV | $63.41 | 1 |
| NY | $60.44–$75.11 | 5 |
| OH | $58.56 | 1 |
| OK | $57.27 | 1 |
| OR | $63.04–$69.66 | 2 |
| PA | $58.80–$66.02 | 2 |
| PR | $64.07 | 1 |
| RI | $65.37 | 1 |
| SC | $59.07 | 1 |
| SD | $63.02 | 1 |
| TN | $58.02 | 1 |
| TX | $58.33–$66.67 | 8 |
| UT | $60.01 | 1 |
| VA | $62.31–$73.93 | 2 |
| VI | $64.07 | 1 |
| VT | $62.57 | 1 |
| WA | $66.38–$76.47 | 2 |
| WI | $60.63 | 1 |
| WV | $56.36 | 1 |
| WY | $63.29 | 1 |
How the 94729 rate is calculated
Each of 94729’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 · 94729
RVUs × geographic indexes × conversion factor
Work0.19
0.19 RVUs× 1.000 GPCI
Practice expense1.69
1.69 RVUs× 1.000 GPCI
Malpractice0.02
0.02 RVUs× 1.000 GPCI
Adjusted RVUs
1.9000
Conversion factor
$33.4009
Medicare rate
$63.46
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact New Mexico inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
12,439
- Code
- 94729
- Physician work
- 0.19
- Practice expense
- 1.69
- Malpractice
- 0.02
GPCI2026.csv
77
- Locality
- New Mexico
- Physician work
- 1.000
- Practice expense
- 0.917
- Malpractice
- 1.201
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.19 | × 1.000 | 0.1900 |
| Practice expense | 1.69 | × 0.917 | 1.5497 |
| Malpractice | 0.02 | × 1.201 | 0.0240 |
| Total RVUs | 1.7637 | ||
| Conversion factor | × 33.4009 | ||
Office rate, New Mexico$58.91
Office: (0.19 × 1 + 1.69 × 0.917 + 0.02 × 1.201) × $33.4009 = $58.91
Payment rules and modifiers for 94729
The CMS indicators that decide how 94729 is paid alongside other services.
CMS payment indicators · 94729
Diffusing capacity (DLCO), add-on to pulmonary function testing
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| 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
94729 without 26 · national office
$63.46
Diffusing capacity (DLCO), add-on to pulmonary function testing
94729-26 · Professional component
$9.35
Pays only the interpretation and report.
How 94729 has changed in New Mexico
94729 · Office / nonfacility
$58.91
Effective 2026-10-01
The base rate is $8.83 higher than on 2025-10-01, moving from $50.08 to $58.91 (17.6%).
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
$50.08changed to$58.91
- Conversion factor 32.3465 changed to 33.4009
- Practice expense RVU 1.47 changed to 1.69
- Practice expense GPCI 0.908 changed to 0.917
- Malpractice GPCI 1.172 changed to 1.201
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$52.14changed to$50.08
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 1.49 changed to 1.47
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$51.29changed to$52.14
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$52.47changed to$51.29
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 1.48 changed to 1.49
- Practice expense GPCI 0.902 changed to 0.908
- Malpractice GPCI 1.169 changed to 1.172
January 1, 2023
RVU23A
$54.51changed to$52.47
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 1.52 changed to 1.48
- Practice expense GPCI 0.896 changed to 0.902
- Malpractice GPCI 1.166 changed to 1.169
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$54.97changed to$54.51
- Conversion factor 34.8931 changed to 34.6062
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$52.95changed to$54.97
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 1.38 changed to 1.52
- Practice expense GPCI 0.908 changed to 0.896
- Malpractice GPCI 1.207 changed to 1.166
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$52.56changed to$52.95
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 1.35 changed to 1.38
- Practice expense GPCI 0.921 changed to 0.908
- Malpractice GPCI 1.247 changed to 1.207
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$52.17changed to$52.56
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 1.34 changed to 1.35
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$51.60changed to$52.17
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 1.33 changed to 1.34
- Practice expense GPCI 0.920 changed to 0.921
- Malpractice GPCI 1.204 changed to 1.247
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$51.40changed to$51.60
- Conversion factor 35.8043 changed to 35.8887
- Practice expense GPCI 0.919 changed to 0.920
- Malpractice GPCI 1.161 changed to 1.204
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$51.58changed to$51.40
- Conversion factor 35.9335 changed to 35.8043
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$51.33changed to$51.58
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$50.66changed to$51.33
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 1.31 changed to 1.33
- Practice expense GPCI 0.918 changed to 0.919
- Malpractice GPCI 1.079 changed to 1.161
Held through RVU15B.
January 1, 2014
RVU14A
$57.94changed to$50.66
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 1.63 changed to 1.31
- Practice expense GPCI 0.916 changed to 0.918
- Malpractice GPCI 0.997 changed to 1.079
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $57.94
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $58.91 | Not available in this setting | RVU26D |
| 2026-07-01 | $58.91 | Not available in this setting | RVU26C |
| 2026-04-01 | $58.91 | Not available in this setting | RVU26B |
| 2026-01-01 | $58.91 | Not available in this setting | RVU26A |
| 2025-10-01 | $50.08 | Not available in this setting | RVU25D |
| 2025-07-01 | $50.08 | Not available in this setting | RVU25C |
| 2025-04-01 | $50.08 | Not available in this setting | RVU25B |
| 2025-01-01 | $50.08 | Not available in this setting | RVU25A |
| 2024-10-01 | $52.14 | Not available in this setting | RVU24D |
| 2024-07-01 | $52.14 | Not available in this setting | RVU24C |
| 2024-04-01 | $52.14 | Not available in this setting | RVU24B |
| 2024-03-09 | $52.14 | Not available in this setting | RVU24AR |
| 2024-01-01 | $51.29 | Not available in this setting | RVU24A |
| 2023-10-01 | $52.47 | Not available in this setting | RVU23D |
| 2023-07-01 | $52.47 | Not available in this setting | RVU23C |
| 2023-04-01 | $52.47 | Not available in this setting | RVU23B |
| 2023-01-01 | $52.47 | Not available in this setting | RVU23A |
| 2022-10-01 | $54.51 | Not available in this setting | RVU22D |
| 2022-07-01 | $54.51 | Not available in this setting | RVU22C |
| 2022-04-01 | $54.51 | Not available in this setting | RVU22B |
| 2022-01-01 | $54.51 | Not available in this setting | RVU22A |
| 2021-10-01 | $54.97 | Not available in this setting | RVU21D |
| 2021-07-01 | $54.97 | Not available in this setting | RVU21C |
| 2021-04-01 | $54.97 | Not available in this setting | RVU21B |
| 2021-01-01 | $54.97 | Not available in this setting | RVU21A |
| 2020-10-01 | $52.95 | Not available in this setting | RVU20D |
| 2020-07-01 | $52.95 | Not available in this setting | RVU20C |
| 2020-04-01 | $52.95 | Not available in this setting | RVU20B |
| 2020-01-01 | $52.95 | Not available in this setting | RVU20A |
| 2019-10-01 | $52.56 | Not available in this setting | RVU19D |
| 2019-07-01 | $52.56 | Not available in this setting | RVU19C |
| 2019-04-01 | $52.56 | Not available in this setting | RVU19B |
| 2019-01-01 | $52.56 | Not available in this setting | RVU19A |
| 2018-10-01 | $52.17 | Not available in this setting | RVU18D |
| 2018-07-01 | $52.17 | Not available in this setting | RVU18C |
| 2018-04-01 | $52.17 | Not available in this setting | RVU18B |
| 2018-01-01 | $52.17 | Not available in this setting | RVU18AR1 |
| 2017-10-01 | $51.60 | Not available in this setting | RVU17D |
| 2017-07-01 | $51.60 | Not available in this setting | RVU17C |
| 2017-04-01 | $51.60 | Not available in this setting | RVU17B |
| 2017-01-01 | $51.60 | Not available in this setting | RVU17A |
| 2016-10-01 | $51.40 | Not available in this setting | RVU16D |
| 2016-07-01 | $51.40 | Not available in this setting | RVU16C |
| 2016-04-01 | $51.40 | Not available in this setting | RVU16B |
| 2016-01-01 | $51.40 | Not available in this setting | RVU16A |
| 2015-10-01 | $51.58 | Not available in this setting | RVU15D |
| 2015-07-01 | $51.58 | Not available in this setting | RVU15C |
| 2015-04-01 | $51.33 | Not available in this setting | RVU15B |
| 2015-01-01 | $51.33 | Not available in this setting | RVU15A |
| 2014-10-01 | $50.66 | Not available in this setting | RVU14D |
| 2014-07-01 | $50.66 | Not available in this setting | RVU14C |
| 2014-04-01 | $50.66 | Not available in this setting | RVU14B |
| 2014-01-01 | $50.66 | Not available in this setting | RVU14A |
| 2013-10-01 | $57.94 | Not available in this setting | RVU13D |
| 2013-07-01 | $57.94 | Not available in this setting | RVU13C |
| 2013-04-01 | $57.94 | Not available in this setting | RVU13B |
| 2013-01-01 | $57.94 | Not available in this setting | RVU13AR |
Where the New Mexico rate applies
New Mexico is a Medicare payment area, not a city. Our Census mapping connects it to 528 cities and communities in New Mexico. Some span more than one payment area; confirm with the service ZIP.
- Abeytas
- Abiquiu
- Acomita Lake
- Adelino
- Agua Fria
- Alamillo
- Alamo
- Alamogordo
94729 billing questions
Can 94729 be billed when DLCO is the only test performed?
No. It is an add-on and must be reported with an eligible primary pulmonary function code, such as 94010, 94060, 94726, 94727, 94728, 94070, or 94375.
How many units of 94729 are reported per session?
Report one unit per testing session. Multiple DLCO maneuvers performed to obtain reproducible results are part of that service.
Which modifier does the pulmonologist use when reading DLCO in a hospital PFT lab?
Report 94729 with modifier 26 for the physician’s interpretation. The hospital reports the technical portion with modifier TC.
Is a hemoglobin correction billed separately?
The calculation adjustment for hemoglobin is part of interpreting DLCO. A separately performed hemoglobin laboratory test is a distinct service when supported and reportable.
Can 94729 be reported with both 94726 and 94727?
94729 may accompany either lung-volume method. Do not report both lung-volume codes for the same set of measurements; select the method performed.
What documentation supports 94729?
The PFT report should show measured DLCO, predicted and percent-predicted results, test quality or reproducibility, and any hemoglobin adjustment. A professional or global claim also requires the physician’s interpretation.
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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