CPT code 77073: Bone length study, lower extremity2026 Medicare rate & RVUs
Reports radiographic measurement of lower-extremity bone lengths, commonly used to evaluate limb-length differences and guide orthopedic assessment or treatment.
Medicare pays $46.43 for 77073 nationally in the office. Local office rates run $40.71–$63.27.
Medicare rate · 77073
Bone length study, lower extremity
- Work RVUs
- 0.25
- Total RVUs
- 1.39
- Global days
- XXX
National rate · 2026
$46.43
Office setting, before claim adjustments.
See every locality for 77073 →Billed by an NP, PA or therapist? →
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 10 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.
Where 77073 pays more and less
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
109 payment localities
$40.71 to $63.27
109 of 109 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Alabama | $41.36 | Unavailable |
| Alaska | $52.56 | Unavailable |
| Arizona | $45.13 | Unavailable |
| Arkansas | $40.71 | Unavailable |
| Atlanta, GA | $47.25 | Unavailable |
| Austin, TX | $48.48 | Unavailable |
| Bakersfield, CA | $49.75 | Unavailable |
| Baltimore area, MD | $49.50 | Unavailable |
| Beaumont, TX | $43.02 | Unavailable |
| Brazoria, TX | $45.94 | Unavailable |
| Chicago, IL | $47.97 | Unavailable |
| Chico, CA | $49.66 | Unavailable |
| Colorado | $48.68 | Unavailable |
| Connecticut | $49.66 | Unavailable |
| Dallas, TX | $46.21 | Unavailable |
| Delaware | $45.92 | Unavailable |
| Detroit, MI | $45.82 | Unavailable |
| East St. Louis, IL | $44.48 | Unavailable |
| El Centro, CA | $49.67 | Unavailable |
| Fort Lauderdale, FL | $47.72 | Unavailable |
| Fort Worth, TX | $45.85 | Unavailable |
| Fresno, CA | $49.66 | Unavailable |
| Galveston, TX | $46.06 | Unavailable |
| Hanford, CA | $49.66 | Unavailable |
| Hawaii, Guam, HI | $51.08 | Unavailable |
| Houston, TX | $46.61 | Unavailable |
| Idaho | $42.93 | Unavailable |
| Indiana | $43.21 | Unavailable |
| Iowa | $42.67 | Unavailable |
| Kansas | $42.37 | Unavailable |
| Kentucky | $42.23 | Unavailable |
| King County, WA | $55.08 | Unavailable |
| Los Angeles, CA | $53.22 | Unavailable |
| Madera, CA | $49.66 | Unavailable |
| Manhattan, NY | $53.56 | Unavailable |
| Marin County, CA | $61.88 | Unavailable |
| Merced, CA | $49.66 | Unavailable |
| Metropolitan Boston, MA | $53.85 | Unavailable |
| Metropolitan Kansas City, MO | $44.14 | Unavailable |
| Metropolitan Philadelphia, PA | $48.29 | Unavailable |
| Metropolitan St. Louis, MO | $44.65 | Unavailable |
| Miami, FL | $49.48 | Unavailable |
| Minnesota | $46.80 | Unavailable |
| Mississippi | $41.01 | Unavailable |
| Modesto, CA | $49.66 | Unavailable |
| Montana | $46.43 | Unavailable |
| Napa, CA | $58.25 | Unavailable |
| Nebraska | $42.95 | Unavailable |
| Nevada | $46.30 | Unavailable |
| New Hampshire | $47.82 | Unavailable |
| New Mexico | $43.55 | Unavailable |
| New Orleans, LA | $44.38 | Unavailable |
| North Carolina | $43.58 | Unavailable |
| North Dakota | $45.83 | Unavailable |
| Northern New Jersey | $52.95 | Unavailable |
| NYC suburbs and Long Island, NY | $54.83 | Unavailable |
| Ohio | $43.21 | Unavailable |
| Oklahoma | $42.24 | Unavailable |
| Oxnard, CA | $53.03 | Unavailable |
| Portland, OR | $50.42 | Unavailable |
| Poughkeepsie and northern NYC suburbs, NY | $50.54 | Unavailable |
| Puerto Rico | $46.82 | Unavailable |
| Queens, NY | $54.15 | Unavailable |
| Redding, CA | $49.66 | Unavailable |
| Rest of California | $49.66 | Unavailable |
| Rest of Florida | $45.30 | Unavailable |
| Rest of Georgia | $42.62 | Unavailable |
| Rest of Illinois | $43.77 | Unavailable |
| Rest of Louisiana | $42.12 | Unavailable |
| Rest of Maine | $43.08 | Unavailable |
| Rest of Maryland | $46.87 | Unavailable |
| Rest of Massachusetts | $48.32 | Unavailable |
| Rest of Michigan | $43.33 | Unavailable |
| Rest of Missouri | $41.28 | Unavailable |
| Rest of New Jersey | $50.27 | Unavailable |
| Rest of New York | $44.28 | Unavailable |
| Rest of Oregon | $45.98 | Unavailable |
| Rest of Pennsylvania | $43.33 | Unavailable |
| Rest of Texas | $44.44 | Unavailable |
| Rest of Washington | $48.26 | Unavailable |
| Rhode Island | $47.70 | Unavailable |
| Riverside, CA | $49.99 | Unavailable |
| Sacramento, CA | $52.31 | Unavailable |
| Salinas, CA | $52.12 | Unavailable |
| San Benito County, CA | $63.27 | Unavailable |
| San Diego, CA | $53.49 | Unavailable |
| San Francisco, CA | $61.85 | Unavailable |
| San Luis Obispo, CA | $51.26 | Unavailable |
| Santa Clara County, CA | $63.13 | Unavailable |
| Santa Cruz, CA | $54.11 | Unavailable |
| Santa Maria, CA | $52.35 | Unavailable |
| Santa Rosa, CA | $54.67 | Unavailable |
| South Carolina | $43.46 | Unavailable |
| South Dakota | $45.76 | Unavailable |
| Southern Maine, ME | $45.72 | Unavailable |
| Stockton, CA | $49.66 | Unavailable |
| Suburban Chicago, IL | $48.26 | Unavailable |
| Tennessee | $42.59 | Unavailable |
| Utah | $44.10 | Unavailable |
| Vallejo, CA | $58.20 | Unavailable |
| Vermont | $45.56 | Unavailable |
| Virgin Islands, VI | $46.82 | Unavailable |
| Virginia | $45.50 | Unavailable |
| Visalia, CA | $49.66 | Unavailable |
| Washington, DC area | $53.59 | Unavailable |
| West Virginia | $42.00 | Unavailable |
| Wisconsin | $44.18 | Unavailable |
| Wyoming | $46.17 | Unavailable |
| Yuba City, CA | $49.66 | Unavailable |
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.
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.
77073 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 77072Bone ageSkeletal maturity study
- 77072 assesses skeletal maturity using bone age; 77073 evaluates lower-extremity bone lengths.
- 77074Skeletal surveyLimited examination
- 77074 is a limited osseous survey for a broader skeletal imaging question, rather than a focused lower-extremity length assessment.
- 73590Lower-leg X-rayTibia and fibula, two views
- 73590 is a dedicated tibia and fibula radiographic examination. Use 77073 for the limb-length study, not simply because a lower-leg bone is imaged.
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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