CPT code 78122: Blood volume test, whole blood determination2026 Medicare rate & RVUs in Washington, DC area
A nuclear medicine blood volume study measures circulating whole blood volume when a clinician needs a direct assessment beyond routine blood counts.
In Washington, DC area, Medicare pays $117.27 for 78122 in the office.
Check a contract rate as a % of Medicare · 78122 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 78122 covers
This study uses a tracer-dilution technique to estimate circulating whole blood volume from patient samples and measurement of the tracer. It is typically performed in a hospital nuclear medicine department, with a nuclear medicine technologist handling the technical procedure and a physician interpreting the results. Clinicians may request it when evaluating suspected abnormalities in circulating blood volume, including certain hematologic disorders.
Report 78122 when the service determines whole blood volume, rather than only plasma volume or red cell mass. The record should support the clinical reason for testing, the tracer and sampling procedure performed, the measurements used, and the physician’s interpretation. CMS recognizes professional and technical components: report modifier 26 for the interpretation, modifier TC for the equipment and staff portion, or neither modifier when billing the global service. CMS separately prices the 26 and TC services.
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 Washington, DC area compares for 78122
Across 109 of 109 payment localities, the office rate for 78122 runs from $88.32 in Arkansas to $139.24 in San Benito County, CA. Washington, DC area pays $117.27. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Washington, DC area · this page$117.27
- Los Angeles, CA · California$116.60−$0.67
- Miami, FL · Florida$107.73−$9.54
- Chicago, IL · Illinois$104.33−$12.94
- Manhattan, NY · New York$117.01−$0.26
- Alaska · Alaska$113.15−$4.12
- Alabama · Alabama$89.77−$27.50
Other areas in District of Columbia first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| ArkansasArkansas | $88.32 | — |
| ArizonaArizona | $98.30 | — |
| Bakersfield, CACalifornia | $108.81 | — |
| Chico, CACalifornia | $108.64 | — |
| El Centro, CACalifornia | $108.65 | — |
| Fresno, CACalifornia | $108.64 | — |
| Hanford, CACalifornia | $108.64 | — |
| Madera, CACalifornia | $108.64 | — |
| Merced, CACalifornia | $108.64 | — |
| Modesto, CACalifornia | $108.64 | — |
| Napa, CACalifornia | $128.02 | — |
| Oxnard, CACalifornia | $116.24 | — |
| Redding, CACalifornia | $108.64 | — |
| Rest of CaliforniaCalifornia | $108.64 | — |
| Riverside, CACalifornia | $109.29 | — |
| Sacramento, CACalifornia | $114.58 | — |
| Salinas, CACalifornia | $114.17 | — |
| San Diego, CACalifornia | $117.29 | — |
| Marin County, CACalifornia | $136.16 | — |
| San Francisco, CACalifornia | $136.10 | — |
| San Benito County, CACalifornia | $139.24 | — |
| Santa Clara County, CACalifornia | $138.96 | — |
| San Luis Obispo, CACalifornia | $112.27 | — |
| Santa Cruz, CACalifornia | $118.75 | — |
| Santa Maria, CACalifornia | $114.71 | — |
| Santa Rosa, CACalifornia | $119.98 | — |
| Stockton, CACalifornia | $108.64 | — |
| Vallejo, CACalifornia | $127.92 | — |
| Visalia, CACalifornia | $108.64 | — |
| Yuba City, CACalifornia | $108.64 | — |
| ColoradoColorado | $106.35 | — |
| ConnecticutConnecticut | $108.43 | — |
| DelawareDelaware | $100.06 | — |
| Fort Lauderdale, FLFlorida | $103.92 | — |
| Rest of FloridaFlorida | $98.49 | — |
| Atlanta, GAGeorgia | $103.00 | — |
| Rest of GeorgiaGeorgia | $92.46 | — |
| Hawaii, Guam, HIHawaii | $111.94 | — |
| IowaIowa | $92.81 | — |
| IdahoIdaho | $93.39 | — |
| East St. Louis, ILIllinois | $96.48 | — |
| Rest of IllinoisIllinois | $94.98 | — |
| Suburban Chicago, ILIllinois | $105.14 | — |
| IndianaIndiana | $94.01 | — |
| KansasKansas | $92.10 | — |
| KentuckyKentucky | $91.65 | — |
| New Orleans, LALouisiana | $96.49 | — |
| Rest of LouisianaLouisiana | $91.40 | — |
| Metropolitan Boston, MAMassachusetts | $117.98 | — |
| Rest of MassachusettsMassachusetts | $105.51 | — |
| Baltimore area, MDMaryland | $108.08 | — |
| Rest of MarylandMaryland | $102.20 | — |
| Rest of MaineMaine | $93.69 | — |
| Southern Maine, MEMaine | $99.70 | — |
| Detroit, MIMichigan | $99.62 | — |
| Rest of MichiganMichigan | $94.11 | — |
| MinnesotaMinnesota | $102.24 | — |
| Metropolitan Kansas City, MOMissouri | $96.00 | — |
| Metropolitan St. Louis, MOMissouri | $97.15 | — |
| Rest of MissouriMissouri | $89.49 | — |
| MississippiMississippi | $88.94 | — |
| MontanaMontana | $101.20 | — |
| North CarolinaNorth Carolina | $94.82 | — |
| North DakotaNorth Dakota | $100.01 | — |
| NebraskaNebraska | $93.45 | — |
| New HampshireNew Hampshire | $104.42 | — |
| Northern New JerseyNew Jersey | $115.79 | — |
| Rest of New JerseyNew Jersey | $109.76 | — |
| New MexicoNew Mexico | $94.59 | — |
| NevadaNevada | $100.95 | — |
| NYC suburbs and Long Island, NYNew York | $119.83 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $110.31 | — |
| Queens, NYNew York | $118.41 | — |
| Rest of New YorkNew York | $96.38 | — |
| OhioOhio | $93.87 | — |
| OklahomaOklahoma | $91.72 | — |
| Portland, OROregon | $110.31 | — |
| Rest of OregonOregon | $100.27 | — |
| Metropolitan Philadelphia, PAPennsylvania | $105.32 | — |
| Rest of PennsylvaniaPennsylvania | $94.17 | — |
| Puerto RicoPuerto Rico | $102.10 | — |
| Rhode IslandRhode Island | $104.06 | — |
| South CarolinaSouth Carolina | $94.48 | — |
| South DakotaSouth Dakota | $99.87 | — |
| TennesseeTennessee | $92.59 | — |
| Austin, TXTexas | $105.91 | — |
| Beaumont, TXTexas | $93.46 | — |
| Brazoria, TXTexas | $100.12 | — |
| Dallas, TXTexas | $100.71 | — |
| Fort Worth, TXTexas | $99.90 | — |
| Galveston, TXTexas | $100.39 | — |
| Houston, TXTexas | $101.48 | — |
| Rest of TexasTexas | $96.70 | — |
| UtahUtah | $95.93 | — |
| VirginiaVirginia | $99.18 | — |
| Virgin Islands, VIUnited States Virgin Islands | $102.10 | — |
| VermontVermont | $99.37 | — |
| Rest of WashingtonWashington | $105.40 | — |
| King County, WAWashington | $120.76 | — |
| WisconsinWisconsin | $96.27 | — |
| West VirginiaWest Virginia | $91.00 | — |
| WyomingWyoming | $100.68 | — |
78122 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.
$88.32
$123.94
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 | $113.15 | 1 |
| AL | $89.77 | 1 |
| AR | $88.32 | 1 |
| AZ | $98.30 | 1 |
| CA | $108.64–$139.24 | 29 |
| CO | $106.35 | 1 |
| CT | $108.43 | 1 |
| DC | $117.27 | 1 |
| DE | $100.06 | 1 |
| FL | $98.49–$107.73 | 3 |
| GA | $92.46–$103.00 | 2 |
| GU | $111.94 | 1 |
| HI | $111.94 | 1 |
| IA | $92.81 | 1 |
| ID | $93.39 | 1 |
| IL | $94.98–$105.14 | 4 |
| IN | $94.01 | 1 |
| KS | $92.10 | 1 |
| KY | $91.65 | 1 |
| LA | $91.40–$96.49 | 2 |
| MA | $105.51–$117.98 | 2 |
| MD | $102.20–$117.27 | 3 |
| ME | $93.69–$99.70 | 2 |
| MI | $94.11–$99.62 | 2 |
| MN | $102.24 | 1 |
| MO | $89.49–$97.15 | 3 |
| MS | $88.94 | 1 |
| MT | $101.20 | 1 |
| NC | $94.82 | 1 |
| ND | $100.01 | 1 |
| NE | $93.45 | 1 |
| NH | $104.42 | 1 |
| NJ | $109.76–$115.79 | 2 |
| NM | $94.59 | 1 |
| NV | $100.95 | 1 |
| NY | $96.38–$119.83 | 5 |
| OH | $93.87 | 1 |
| OK | $91.72 | 1 |
| OR | $100.27–$110.31 | 2 |
| PA | $94.17–$105.32 | 2 |
| PR | $102.10 | 1 |
| RI | $104.06 | 1 |
| SC | $94.48 | 1 |
| SD | $99.87 | 1 |
| TN | $92.59 | 1 |
| TX | $93.46–$105.91 | 8 |
| UT | $95.93 | 1 |
| VA | $99.18–$117.27 | 2 |
| VI | $102.10 | 1 |
| VT | $99.37 | 1 |
| WA | $105.40–$120.76 | 2 |
| WI | $96.27 | 1 |
| WV | $91.00 | 1 |
| WY | $100.68 | 1 |
How the 78122 rate is calculated
Each of 78122’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 · 78122
RVUs × geographic indexes × conversion factor
Work0.44
0.44 RVUs× 1.000 GPCI
Practice expense2.53
2.53 RVUs× 1.000 GPCI
Malpractice0.06
0.06 RVUs× 1.000 GPCI
Adjusted RVUs
3.0300
Conversion factor
$33.4009
Medicare rate
$101.20
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Washington, DC area inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
9,236
- Code
- 78122
- Physician work
- 0.44
- Practice expense
- 2.53
- Malpractice
- 0.06
GPCI2026.csv
39
- Locality
- Washington, DC area
- Physician work
- 1.054
- Practice expense
- 1.178
- Malpractice
- 1.113
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.44 | × 1.054 | 0.4638 |
| Practice expense | 2.53 | × 1.178 | 2.9803 |
| Malpractice | 0.06 | × 1.113 | 0.0668 |
| Total RVUs | 3.5109 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Washington, DC area$117.27
Office: (0.44 × 1.054 + 2.53 × 1.178 + 0.06 × 1.113) × $33.4009 = $117.27
Payment rules and modifiers for 78122
The CMS indicators that decide how 78122 is paid alongside other services.
CMS payment indicators · 78122
Blood volume test, whole blood determination
| 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
78122 without 26 · national office
$101.20
Blood volume test, whole blood determination
78122-26 · Professional component
$20.71
Pays only the interpretation and report.
How 78122 has changed in Washington, DC area
78122 · Office / nonfacility
$117.27
Effective 2026-10-01
The base rate is $4.38 higher than on 2025-10-01, moving from $112.89 to $117.27 (3.9%).
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
$112.89changed to$117.27
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.45 changed to 0.44
- Practice expense RVU 2.47 changed to 2.53
- Work GPCI 1.057 changed to 1.054
- Practice expense GPCI 1.192 changed to 1.178
- Malpractice GPCI 1.168 changed to 1.113
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$114.59changed to$112.89
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 2.43 changed to 2.47
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$112.72changed to$114.59
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$119.40changed to$112.72
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 2.45 changed to 2.43
- Work GPCI 1.056 changed to 1.057
- Practice expense GPCI 1.214 changed to 1.192
- Malpractice GPCI 1.231 changed to 1.168
January 1, 2023
RVU23A
$120.88changed to$119.40
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 2.39 changed to 2.45
- Malpractice RVU 0.05 changed to 0.06
- Work GPCI 1.054 changed to 1.056
- Practice expense GPCI 1.236 changed to 1.214
- Malpractice GPCI 1.294 changed to 1.231
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$120.59changed to$120.88
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 2.36 changed to 2.39
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$118.47changed to$120.59
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 2.26 changed to 2.36
- Malpractice RVU 0.04 changed to 0.05
- Work GPCI 1.049 changed to 1.054
- Practice expense GPCI 1.221 changed to 1.236
- Malpractice GPCI 1.277 changed to 1.294
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$116.06changed to$118.47
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 2.23 changed to 2.26
- Malpractice RVU 0.05 changed to 0.04
- Work GPCI 1.045 changed to 1.049
- Practice expense GPCI 1.205 changed to 1.221
- Malpractice GPCI 1.261 changed to 1.277
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$118.54changed to$116.06
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 2.29 changed to 2.23
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$119.10changed to$118.54
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 2.31 changed to 2.29
- Work GPCI 1.048 changed to 1.045
- Malpractice GPCI 1.271 changed to 1.261
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$120.18changed to$119.10
- Conversion factor 35.8043 changed to 35.8887
- Practice expense RVU 2.34 changed to 2.31
- Work GPCI 1.051 changed to 1.048
- Malpractice GPCI 1.280 changed to 1.271
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$117.96changed to$120.18
- Conversion factor 35.9335 changed to 35.8043
- Practice expense RVU 2.30 changed to 2.34
- Malpractice RVU 0.03 changed to 0.05
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$117.38changed to$117.96
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$118.12changed to$117.38
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 2.31 changed to 2.30
- Malpractice RVU 0.04 changed to 0.03
- Work GPCI 1.050 changed to 1.051
- Practice expense GPCI 1.202 changed to 1.205
- Malpractice GPCI 1.205 changed to 1.280
Held through RVU15B.
January 1, 2014
RVU14A
$118.68changed to$118.12
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 2.48 changed to 2.31
- Work GPCI 1.049 changed to 1.050
- Practice expense GPCI 1.198 changed to 1.202
- Malpractice GPCI 1.130 changed to 1.205
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $118.68
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $117.27 | Not available in this setting | RVU26D |
| 2026-07-01 | $117.27 | Not available in this setting | RVU26C |
| 2026-04-01 | $117.27 | Not available in this setting | RVU26B |
| 2026-01-01 | $117.27 | Not available in this setting | RVU26A |
| 2025-10-01 | $112.89 | Not available in this setting | RVU25D |
| 2025-07-01 | $112.89 | Not available in this setting | RVU25C |
| 2025-04-01 | $112.89 | Not available in this setting | RVU25B |
| 2025-01-01 | $112.89 | Not available in this setting | RVU25A |
| 2024-10-01 | $114.59 | Not available in this setting | RVU24D |
| 2024-07-01 | $114.59 | Not available in this setting | RVU24C |
| 2024-04-01 | $114.59 | Not available in this setting | RVU24B |
| 2024-03-09 | $114.59 | Not available in this setting | RVU24AR |
| 2024-01-01 | $112.72 | Not available in this setting | RVU24A |
| 2023-10-01 | $119.40 | Not available in this setting | RVU23D |
| 2023-07-01 | $119.40 | Not available in this setting | RVU23C |
| 2023-04-01 | $119.40 | Not available in this setting | RVU23B |
| 2023-01-01 | $119.40 | Not available in this setting | RVU23A |
| 2022-10-01 | $120.88 | Not available in this setting | RVU22D |
| 2022-07-01 | $120.88 | Not available in this setting | RVU22C |
| 2022-04-01 | $120.88 | Not available in this setting | RVU22B |
| 2022-01-01 | $120.88 | Not available in this setting | RVU22A |
| 2021-10-01 | $120.59 | Not available in this setting | RVU21D |
| 2021-07-01 | $120.59 | Not available in this setting | RVU21C |
| 2021-04-01 | $120.59 | Not available in this setting | RVU21B |
| 2021-01-01 | $120.59 | Not available in this setting | RVU21A |
| 2020-10-01 | $118.47 | Not available in this setting | RVU20D |
| 2020-07-01 | $118.47 | Not available in this setting | RVU20C |
| 2020-04-01 | $118.47 | Not available in this setting | RVU20B |
| 2020-01-01 | $118.47 | Not available in this setting | RVU20A |
| 2019-10-01 | $116.06 | Not available in this setting | RVU19D |
| 2019-07-01 | $116.06 | Not available in this setting | RVU19C |
| 2019-04-01 | $116.06 | Not available in this setting | RVU19B |
| 2019-01-01 | $116.06 | Not available in this setting | RVU19A |
| 2018-10-01 | $118.54 | Not available in this setting | RVU18D |
| 2018-07-01 | $118.54 | Not available in this setting | RVU18C |
| 2018-04-01 | $118.54 | Not available in this setting | RVU18B |
| 2018-01-01 | $118.54 | Not available in this setting | RVU18AR1 |
| 2017-10-01 | $119.10 | Not available in this setting | RVU17D |
| 2017-07-01 | $119.10 | Not available in this setting | RVU17C |
| 2017-04-01 | $119.10 | Not available in this setting | RVU17B |
| 2017-01-01 | $119.10 | Not available in this setting | RVU17A |
| 2016-10-01 | $120.18 | Not available in this setting | RVU16D |
| 2016-07-01 | $120.18 | Not available in this setting | RVU16C |
| 2016-04-01 | $120.18 | Not available in this setting | RVU16B |
| 2016-01-01 | $120.18 | Not available in this setting | RVU16A |
| 2015-10-01 | $117.96 | Not available in this setting | RVU15D |
| 2015-07-01 | $117.96 | Not available in this setting | RVU15C |
| 2015-04-01 | $117.38 | Not available in this setting | RVU15B |
| 2015-01-01 | $117.38 | Not available in this setting | RVU15A |
| 2014-10-01 | $118.12 | Not available in this setting | RVU14D |
| 2014-07-01 | $118.12 | Not available in this setting | RVU14C |
| 2014-04-01 | $118.12 | Not available in this setting | RVU14B |
| 2014-01-01 | $118.12 | Not available in this setting | RVU14A |
| 2013-10-01 | $118.68 | Not available in this setting | RVU13D |
| 2013-07-01 | $118.68 | Not available in this setting | RVU13C |
| 2013-04-01 | $118.68 | Not available in this setting | RVU13B |
| 2013-01-01 | $118.68 | Not available in this setting | RVU13AR |
Where the Washington, DC area rate applies
Washington, DC area is a Medicare payment area, not a city. Our Census mapping connects it to 1 cities and communities in District of Columbia. Some span more than one payment area; confirm with the service ZIP.
- Washington
78122 billing questions
How is 78122 different from a plasma volume study?
78122 determines whole blood volume. Use a plasma volume code when the measured quantity is plasma volume alone.
How is 78122 different from red cell mass testing?
78122 measures whole blood volume; red cell mass codes concern the circulating red cell component. Select the code that matches the quantity actually determined.
When should modifier 26 or TC be reported?
Use modifier 26 for the physician’s interpretation and report, or TC for the technical service involving equipment and staff. Bill without either modifier for the global service.
What documentation supports 78122?
Document the clinical indication, tracer and sampling procedure, measurements used to determine whole blood volume, and the interpreting physician’s findings.
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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