CPT code 77073: Bone length study, lower extremity2026 Medicare rate & RVUs in Idaho
Reports radiographic measurement of lower-extremity bone lengths, commonly used to evaluate limb-length differences and guide orthopedic assessment or treatment.
In Idaho, Medicare pays $42.93 for 77073 in the office.
Check a contract rate as a % of Medicare · 77073 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 77073 covers
This study uses radiographs to compare lower-extremity bone lengths, often when a patient has a suspected limb-length difference or is being assessed for an orthopedic growth or alignment concern. It is commonly performed in radiology departments and imaging centers, with a radiologic technologist acquiring the images and a radiologist interpreting them. Orthopedic clinicians may use the findings in evaluating children with unequal limb growth and patients being considered for corrective treatment.
Report 77073 for the bone-length examination, rather than a routine radiograph of one bone or joint. The order and report should support the limb-length question and identify the structures assessed and the interpretation. CMS recognizes professional and technical components: report modifier 26 for the interpretation, modifier TC for the equipment and staff, or no modifier when billing the global service. The component may be billed separately when the service is split between practitioners or entities.
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 Idaho compares for 77073
Across 109 of 109 payment localities, the office rate for 77073 runs from $40.71 in Arkansas to $63.27 in San Benito County, CA. Idaho pays $42.93. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Idaho · this page$42.93
- Los Angeles, CA · California$53.22+$10.29
- Washington, DC area · District of Columbia$53.59+$10.66
- Miami, FL · Florida$49.48+$6.55
- Chicago, IL · Illinois$47.97+$5.04
- Manhattan, NY · New York$53.56+$10.63
- Alaska · Alaska$52.56+$9.63
Other areas in Idaho first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $41.36 | — |
| ArkansasArkansas | $40.71 | — |
| ArizonaArizona | $45.13 | — |
| Bakersfield, CACalifornia | $49.75 | — |
| Chico, CACalifornia | $49.66 | — |
| El Centro, CACalifornia | $49.67 | — |
| Fresno, CACalifornia | $49.66 | — |
| Hanford, CACalifornia | $49.66 | — |
| Madera, CACalifornia | $49.66 | — |
| Merced, CACalifornia | $49.66 | — |
| Modesto, CACalifornia | $49.66 | — |
| Napa, CACalifornia | $58.25 | — |
| Oxnard, CACalifornia | $53.03 | — |
| Redding, CACalifornia | $49.66 | — |
| Rest of CaliforniaCalifornia | $49.66 | — |
| Riverside, CACalifornia | $49.99 | — |
| Sacramento, CACalifornia | $52.31 | — |
| Salinas, CACalifornia | $52.12 | — |
| San Diego, CACalifornia | $53.49 | — |
| Marin County, CACalifornia | $61.88 | — |
| San Francisco, CACalifornia | $61.85 | — |
| San Benito County, CACalifornia | $63.27 | — |
| Santa Clara County, CACalifornia | $63.13 | — |
| San Luis Obispo, CACalifornia | $51.26 | — |
| Santa Cruz, CACalifornia | $54.11 | — |
| Santa Maria, CACalifornia | $52.35 | — |
| Santa Rosa, CACalifornia | $54.67 | — |
| Stockton, CACalifornia | $49.66 | — |
| Vallejo, CACalifornia | $58.20 | — |
| Visalia, CACalifornia | $49.66 | — |
| Yuba City, CACalifornia | $49.66 | — |
| ColoradoColorado | $48.68 | — |
| ConnecticutConnecticut | $49.66 | — |
| DelawareDelaware | $45.92 | — |
| Fort Lauderdale, FLFlorida | $47.72 | — |
| Rest of FloridaFlorida | $45.30 | — |
| Atlanta, GAGeorgia | $47.25 | — |
| Rest of GeorgiaGeorgia | $42.62 | — |
| Hawaii, Guam, HIHawaii | $51.08 | — |
| IowaIowa | $42.67 | — |
| East St. Louis, ILIllinois | $44.48 | — |
| Rest of IllinoisIllinois | $43.77 | — |
| Suburban Chicago, ILIllinois | $48.26 | — |
| IndianaIndiana | $43.21 | — |
| KansasKansas | $42.37 | — |
| KentuckyKentucky | $42.23 | — |
| New Orleans, LALouisiana | $44.38 | — |
| Rest of LouisianaLouisiana | $42.12 | — |
| Metropolitan Boston, MAMassachusetts | $53.85 | — |
| Rest of MassachusettsMassachusetts | $48.32 | — |
| Baltimore area, MDMaryland | $49.50 | — |
| Rest of MarylandMaryland | $46.87 | — |
| Rest of MaineMaine | $43.08 | — |
| Southern Maine, MEMaine | $45.72 | — |
| Detroit, MIMichigan | $45.82 | — |
| Rest of MichiganMichigan | $43.33 | — |
| MinnesotaMinnesota | $46.80 | — |
| Metropolitan Kansas City, MOMissouri | $44.14 | — |
| Metropolitan St. Louis, MOMissouri | $44.65 | — |
| Rest of MissouriMissouri | $41.28 | — |
| MississippiMississippi | $41.01 | — |
| MontanaMontana | $46.43 | — |
| North CarolinaNorth Carolina | $43.58 | — |
| North DakotaNorth Dakota | $45.83 | — |
| NebraskaNebraska | $42.95 | — |
| New HampshireNew Hampshire | $47.82 | — |
| Northern New JerseyNew Jersey | $52.95 | — |
| Rest of New JerseyNew Jersey | $50.27 | — |
| New MexicoNew Mexico | $43.55 | — |
| NevadaNevada | $46.30 | — |
| NYC suburbs and Long Island, NYNew York | $54.83 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $50.54 | — |
| Queens, NYNew York | $54.15 | — |
| Rest of New YorkNew York | $44.28 | — |
| OhioOhio | $43.21 | — |
| OklahomaOklahoma | $42.24 | — |
| Portland, OROregon | $50.42 | — |
| Rest of OregonOregon | $45.98 | — |
| Metropolitan Philadelphia, PAPennsylvania | $48.29 | — |
| Rest of PennsylvaniaPennsylvania | $43.33 | — |
| Puerto RicoPuerto Rico | $46.82 | — |
| Rhode IslandRhode Island | $47.70 | — |
| South CarolinaSouth Carolina | $43.46 | — |
| South DakotaSouth Dakota | $45.76 | — |
| TennesseeTennessee | $42.59 | — |
| Austin, TXTexas | $48.48 | — |
| Beaumont, TXTexas | $43.02 | — |
| Brazoria, TXTexas | $45.94 | — |
| Dallas, TXTexas | $46.21 | — |
| Fort Worth, TXTexas | $45.85 | — |
| Galveston, TXTexas | $46.06 | — |
| Houston, TXTexas | $46.61 | — |
| Rest of TexasTexas | $44.44 | — |
| UtahUtah | $44.10 | — |
| VirginiaVirginia | $45.50 | — |
| Virgin Islands, VIUnited States Virgin Islands | $46.82 | — |
| VermontVermont | $45.56 | — |
| Rest of WashingtonWashington | $48.26 | — |
| King County, WAWashington | $55.08 | — |
| WisconsinWisconsin | $44.18 | — |
| West VirginiaWest Virginia | $42.00 | — |
| WyomingWyoming | $46.17 | — |
77073 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.
$40.71
$56.47
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 | $52.56 | 1 |
| AL | $41.36 | 1 |
| AR | $40.71 | 1 |
| AZ | $45.13 | 1 |
| CA | $49.66–$63.27 | 29 |
| CO | $48.68 | 1 |
| CT | $49.66 | 1 |
| DC | $53.59 | 1 |
| DE | $45.92 | 1 |
| FL | $45.30–$49.48 | 3 |
| GA | $42.62–$47.25 | 2 |
| GU | $51.08 | 1 |
| HI | $51.08 | 1 |
| IA | $42.67 | 1 |
| ID | $42.93 | 1 |
| IL | $43.77–$48.26 | 4 |
| IN | $43.21 | 1 |
| KS | $42.37 | 1 |
| KY | $42.23 | 1 |
| LA | $42.12–$44.38 | 2 |
| MA | $48.32–$53.85 | 2 |
| MD | $46.87–$53.59 | 3 |
| ME | $43.08–$45.72 | 2 |
| MI | $43.33–$45.82 | 2 |
| MN | $46.80 | 1 |
| MO | $41.28–$44.65 | 3 |
| MS | $41.01 | 1 |
| MT | $46.43 | 1 |
| NC | $43.58 | 1 |
| ND | $45.83 | 1 |
| NE | $42.95 | 1 |
| NH | $47.82 | 1 |
| NJ | $50.27–$52.95 | 2 |
| NM | $43.55 | 1 |
| NV | $46.30 | 1 |
| NY | $44.28–$54.83 | 5 |
| OH | $43.21 | 1 |
| OK | $42.24 | 1 |
| OR | $45.98–$50.42 | 2 |
| PA | $43.33–$48.29 | 2 |
| PR | $46.82 | 1 |
| RI | $47.70 | 1 |
| SC | $43.46 | 1 |
| SD | $45.76 | 1 |
| TN | $42.59 | 1 |
| TX | $43.02–$48.48 | 8 |
| UT | $44.10 | 1 |
| VA | $45.50–$53.59 | 2 |
| VI | $46.82 | 1 |
| VT | $45.56 | 1 |
| WA | $48.26–$55.08 | 2 |
| WI | $44.18 | 1 |
| WV | $42.00 | 1 |
| WY | $46.17 | 1 |
How the 77073 rate is calculated
Each of 77073’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 · 77073
RVUs × geographic indexes × conversion factor
Work0.25
0.25 RVUs× 1.000 GPCI
Practice expense1.11
1.11 RVUs× 1.000 GPCI
Malpractice0.03
0.03 RVUs× 1.000 GPCI
Adjusted RVUs
1.3900
Conversion factor
$33.4009
Medicare rate
$46.43
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Idaho inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
8,989
- Code
- 77073
- Physician work
- 0.25
- Practice expense
- 1.11
- Malpractice
- 0.03
GPCI2026.csv
47
- Locality
- Idaho
- Physician work
- 1.000
- Practice expense
- 0.920
- Malpractice
- 0.473
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.25 | × 1.000 | 0.2500 |
| Practice expense | 1.11 | × 0.920 | 1.0212 |
| Malpractice | 0.03 | × 0.473 | 0.0142 |
| Total RVUs | 1.2854 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Idaho$42.93
Office: (0.25 × 1 + 1.11 × 0.92 + 0.03 × 0.473) × $33.4009 = $42.93
Payment rules and modifiers for 77073
The CMS indicators that decide how 77073 is paid alongside other services.
CMS payment indicators · 77073
Bone length study, lower extremity
| 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
77073 without 26 · national office
$46.43
Bone length study, lower extremity
77073-26 · Professional component
$13.03
Pays only the interpretation and report.
How 77073 has changed in Idaho
77073 · Office / nonfacility
$42.93
Effective 2026-10-01
The base rate is $2.65 higher than on 2025-10-01, moving from $40.28 to $42.93 (6.6%).
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
$40.28changed to$42.93
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.26 changed to 0.25
- Practice expense RVU 1.07 changed to 1.11
- Practice expense GPCI 0.908 changed to 0.920
- Malpractice GPCI 0.461 changed to 0.473
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$41.46changed to$40.28
- Conversion factor 33.2875 changed to 32.3465
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$40.78changed to$41.46
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$41.33changed to$40.78
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 1.06 changed to 1.07
- Practice expense GPCI 0.893 changed to 0.908
- Malpractice GPCI 0.439 changed to 0.461
January 1, 2023
RVU23A
$41.60changed to$41.33
- Conversion factor 34.6062 changed to 33.8872
- Practice expense GPCI 0.877 changed to 0.893
- Malpractice GPCI 0.416 changed to 0.439
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$41.03changed to$41.60
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 1.03 changed to 1.06
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$40.40changed to$41.03
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 0.95 changed to 1.03
- Practice expense GPCI 0.890 changed to 0.877
- Malpractice GPCI 0.464 changed to 0.416
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$34.99changed to$40.40
- Conversion factor 36.0391 changed to 36.0896
- Work RVU 0.27 changed to 0.26
- Practice expense RVU 0.76 changed to 0.95
- Practice expense GPCI 0.902 changed to 0.890
- Malpractice GPCI 0.512 changed to 0.464
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$33.65changed to$34.99
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 0.72 changed to 0.76
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$33.17changed to$33.65
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 0.71 changed to 0.72
- Practice expense GPCI 0.900 changed to 0.902
- Malpractice GPCI 0.510 changed to 0.512
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$33.04changed to$33.17
- Conversion factor 35.8043 changed to 35.8887
- Practice expense GPCI 0.898 changed to 0.900
- Malpractice GPCI 0.508 changed to 0.510
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$33.34changed to$33.04
- Conversion factor 35.9335 changed to 35.8043
- Malpractice RVU 0.04 changed to 0.03
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$33.18changed to$33.34
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$35.06changed to$33.18
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 0.76 changed to 0.71
- Malpractice RVU 0.05 changed to 0.04
- Practice expense GPCI 0.896 changed to 0.898
- Malpractice GPCI 0.556 changed to 0.508
Held through RVU15B.
January 1, 2014
RVU14A
$35.76changed to$35.06
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 0.84 changed to 0.76
- Practice expense GPCI 0.894 changed to 0.896
- Malpractice GPCI 0.603 changed to 0.556
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $35.76
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $42.93 | Not available in this setting | RVU26D |
| 2026-07-01 | $42.93 | Not available in this setting | RVU26C |
| 2026-04-01 | $42.93 | Not available in this setting | RVU26B |
| 2026-01-01 | $42.93 | Not available in this setting | RVU26A |
| 2025-10-01 | $40.28 | Not available in this setting | RVU25D |
| 2025-07-01 | $40.28 | Not available in this setting | RVU25C |
| 2025-04-01 | $40.28 | Not available in this setting | RVU25B |
| 2025-01-01 | $40.28 | Not available in this setting | RVU25A |
| 2024-10-01 | $41.46 | Not available in this setting | RVU24D |
| 2024-07-01 | $41.46 | Not available in this setting | RVU24C |
| 2024-04-01 | $41.46 | Not available in this setting | RVU24B |
| 2024-03-09 | $41.46 | Not available in this setting | RVU24AR |
| 2024-01-01 | $40.78 | Not available in this setting | RVU24A |
| 2023-10-01 | $41.33 | Not available in this setting | RVU23D |
| 2023-07-01 | $41.33 | Not available in this setting | RVU23C |
| 2023-04-01 | $41.33 | Not available in this setting | RVU23B |
| 2023-01-01 | $41.33 | Not available in this setting | RVU23A |
| 2022-10-01 | $41.60 | Not available in this setting | RVU22D |
| 2022-07-01 | $41.60 | Not available in this setting | RVU22C |
| 2022-04-01 | $41.60 | Not available in this setting | RVU22B |
| 2022-01-01 | $41.60 | Not available in this setting | RVU22A |
| 2021-10-01 | $41.03 | Not available in this setting | RVU21D |
| 2021-07-01 | $41.03 | Not available in this setting | RVU21C |
| 2021-04-01 | $41.03 | Not available in this setting | RVU21B |
| 2021-01-01 | $41.03 | Not available in this setting | RVU21A |
| 2020-10-01 | $40.40 | Not available in this setting | RVU20D |
| 2020-07-01 | $40.40 | Not available in this setting | RVU20C |
| 2020-04-01 | $40.40 | Not available in this setting | RVU20B |
| 2020-01-01 | $40.40 | Not available in this setting | RVU20A |
| 2019-10-01 | $34.99 | Not available in this setting | RVU19D |
| 2019-07-01 | $34.99 | Not available in this setting | RVU19C |
| 2019-04-01 | $34.99 | Not available in this setting | RVU19B |
| 2019-01-01 | $34.99 | Not available in this setting | RVU19A |
| 2018-10-01 | $33.65 | Not available in this setting | RVU18D |
| 2018-07-01 | $33.65 | Not available in this setting | RVU18C |
| 2018-04-01 | $33.65 | Not available in this setting | RVU18B |
| 2018-01-01 | $33.65 | Not available in this setting | RVU18AR1 |
| 2017-10-01 | $33.17 | Not available in this setting | RVU17D |
| 2017-07-01 | $33.17 | Not available in this setting | RVU17C |
| 2017-04-01 | $33.17 | Not available in this setting | RVU17B |
| 2017-01-01 | $33.17 | Not available in this setting | RVU17A |
| 2016-10-01 | $33.04 | Not available in this setting | RVU16D |
| 2016-07-01 | $33.04 | Not available in this setting | RVU16C |
| 2016-04-01 | $33.04 | Not available in this setting | RVU16B |
| 2016-01-01 | $33.04 | Not available in this setting | RVU16A |
| 2015-10-01 | $33.34 | Not available in this setting | RVU15D |
| 2015-07-01 | $33.34 | Not available in this setting | RVU15C |
| 2015-04-01 | $33.18 | Not available in this setting | RVU15B |
| 2015-01-01 | $33.18 | Not available in this setting | RVU15A |
| 2014-10-01 | $35.06 | Not available in this setting | RVU14D |
| 2014-07-01 | $35.06 | Not available in this setting | RVU14C |
| 2014-04-01 | $35.06 | Not available in this setting | RVU14B |
| 2014-01-01 | $35.06 | Not available in this setting | RVU14A |
| 2013-10-01 | $35.76 | Not available in this setting | RVU13D |
| 2013-07-01 | $35.76 | Not available in this setting | RVU13C |
| 2013-04-01 | $35.76 | Not available in this setting | RVU13B |
| 2013-01-01 | $35.76 | Not available in this setting | RVU13AR |
Where the Idaho rate applies
Idaho is a Medicare payment area, not a city. Our Census mapping connects it to 235 cities and communities in Idaho. Some span more than one payment area; confirm with the service ZIP.
- Aberdeen
- Acequia
- Albion
- American Falls
- Ammon
- Arbon Valley
- Arco
- Arimo
77073 billing questions
When should 77073 be chosen instead of a bone-age study?
Use 77073 when the imaging question is lower-extremity bone length or limb-length difference. A bone-age study, such as 77072, evaluates skeletal maturity.
How are the professional and technical services reported?
Use modifier 26 for the professional interpretation and modifier TC for the technical service. Without either modifier, the claim represents the global service.
Can dedicated femur or tibia and fibula films also be reported?
They may be separately reported when the clinician orders distinct diagnostic views for a separate clinical question. The documentation should support that additional examination, rather than simply restating the bone-length assessment.
What documentation supports 77073?
The order and report should identify the lower-extremity length question and document the structures evaluated and the radiologist’s findings.
Is 77073 the same as a skeletal survey?
No. It assesses lower-extremity bone lengths; a skeletal survey examines bones for a broader or different diagnostic purpose.
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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