20930
No office rateSp bone algrft morsel add-on
Choose 20931 for structural donor bone used as support; choose 20930 for morselized donor bone used as graft material.
On this page
CMS RVU26D · Effective 2026-10-01
20931 Spinal bone graft Medicare reimbursement rates
Report 20931 with spine surgery when a surgeon implants structural donor bone as support, rather than morselized graft material. Compare 20931 office and facility rates across CMS payment localities.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 20931?
The service location and office or facility setting determine which base rate applies. These are the supported base rates for the 109 payment areas shown below, using the same CMS release.
Office / nonfacility
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Where 20931 pays more and less
Spinal surgery
About 20931: Structural donor bone graft for spine surgery
Report 20931 with spine surgery when a surgeon implants structural donor bone as support, rather than morselized graft material.
CPT 20931 captures placement of a shaped, donor-derived bone graft that provides structural support during spinal reconstruction or fusion. Unlike chips or granules used to fill a fusion bed, this graft retains a block or strut form and may help maintain spacing or support between vertebrae. A spine surgeon typically places it during an operative spinal fusion, such as an interbody fusion, in a hospital or ambulatory surgical setting. The graft is allograft tissue, not bone harvested from the patient during the operation.
Report 20931 only alongside an eligible primary spine procedure; it is an add-on, not a stand-alone service. The operative report should identify the structural allograft and its role in the spinal reconstruction, distinguishing it from morselized allograft and structural autograft. CMS pays this add-on within the primary procedure’s global period.
CMS billing rules for 20931
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
Where the value comes from
- Work RVU1.76 · 60%
- Practice expense (office) RVU0.59 · 20%
- Malpractice RVU0.59 · 20%
7.8K
Medicare services in 2024 · #1602 by national volume
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.
20931 compared with similar codes
Office rate ranges across all CMS payment localities, from the same CMS release.
No office rate
Both involve structural grafting during spine surgery. The source differs: 20931 is donor bone, while 20938 is bone harvested from the patient.
20936
No office rateSp bone agrft local add-on
20936 describes local bone from the operative site used as graft material. It is not the structural donor-bone service reported with 20931.
See how rates vary across the country
20931 · Office / nonfacility · Non-QP. Choose a state to explore its payment localities. A range means the amount varies within that state.
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.
View all state and territory rates as a table
| State / territory | Rate range | Localities |
|---|---|---|
| AK | No published base rate | 1 |
| AL | No published base rate | 1 |
| AR | No published base rate | 1 |
| AZ | No published base rate | 1 |
| CA | No published base rate | 29 |
| CO | No published base rate | 1 |
| CT | No published base rate | 1 |
| DC | No published base rate | 1 |
| DE | No published base rate | 1 |
| FL | No published base rate | 3 |
| GA | No published base rate | 2 |
| GU | No published base rate | 1 |
| HI | No published base rate | 1 |
| IA | No published base rate | 1 |
| ID | No published base rate | 1 |
| IL | No published base rate | 4 |
| IN | No published base rate | 1 |
| KS | No published base rate | 1 |
| KY | No published base rate | 1 |
| LA | No published base rate | 2 |
| MA | No published base rate | 2 |
| MD | No published base rate | 3 |
| ME | No published base rate | 2 |
| MI | No published base rate | 2 |
| MN | No published base rate | 1 |
| MO | No published base rate | 3 |
| MS | No published base rate | 1 |
| MT | No published base rate | 1 |
| NC | No published base rate | 1 |
| ND | No published base rate | 1 |
| NE | No published base rate | 1 |
| NH | No published base rate | 1 |
| NJ | No published base rate | 2 |
| NM | No published base rate | 1 |
| NV | No published base rate | 1 |
| NY | No published base rate | 5 |
| OH | No published base rate | 1 |
| OK | No published base rate | 1 |
| OR | No published base rate | 2 |
| PA | No published base rate | 2 |
| PR | No published base rate | 1 |
| RI | No published base rate | 1 |
| SC | No published base rate | 1 |
| SD | No published base rate | 1 |
| TN | No published base rate | 1 |
| TX | No published base rate | 8 |
| UT | No published base rate | 1 |
| VA | No published base rate | 2 |
| VI | No published base rate | 1 |
| VT | No published base rate | 1 |
| WA | No published base rate | 2 |
| WI | No published base rate | 1 |
| WV | No published base rate | 1 |
| WY | No published base rate | 1 |
Compare 20931 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
109 of 109 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Alabama | Office Unavailable | Facility $87.18 |
| Alaska* | Office Unavailable | Facility $120.02 |
| Arizona | Office Unavailable | Facility $94.75 |
| Arkansas | Office Unavailable | Facility $85.86 |
| Atlanta | Office Unavailable | Facility $102.65 |
| Austin | Office Unavailable | Facility $97.21 |
| Bakersfield | Office Unavailable | Facility $93.50 |
| Baltimore/Surr. Cntys | Office Unavailable | Facility $105.25 |
| Beaumont | Office Unavailable | Facility $95.03 |
| Brazoria | Office Unavailable | Facility $94.16 |
| Chicago | Office Unavailable | Facility $124.23 |
| Chico | Office Unavailable | Facility $91.95 |
| Colorado | Office Unavailable | Facility $95.85 |
| Connecticut | Office Unavailable | Facility $105.03 |
| Dallas | Office Unavailable | Facility $95.85 |
| Dc + Md/Va Suburbs | Office Unavailable | Facility $107.11 |
| Delaware | Office Unavailable | Facility $96.27 |
| Detroit | Office Unavailable | Facility $111.03 |
| East St. Louis | Office Unavailable | Facility $116.60 |
| El Centro | Office Unavailable | Facility $92.04 |
| Fort Lauderdale | Office Unavailable | Facility $114.38 |
| Fort Worth | Office Unavailable | Facility $95.91 |
| Fresno | Office Unavailable | Facility $91.95 |
| Galveston | Office Unavailable | Facility $95.14 |
| Hanford-Corcoran | Office Unavailable | Facility $91.95 |
| Hawaii, Guam | Office Unavailable | Facility $92.60 |
| Houston | Office Unavailable | Facility $105.94 |
| Idaho | Office Unavailable | Facility $86.24 |
| Indiana | Office Unavailable | Facility $86.63 |
| Iowa | Office Unavailable | Facility $84.64 |
| Kansas | Office Unavailable | Facility $86.53 |
| Kentucky | Office Unavailable | Facility $94.34 |
| Los Angeles-Long Beach-Anaheim (Los Angeles/Orange Cnty) | Office Unavailable | Facility $97.59 |
| Madera | Office Unavailable | Facility $91.95 |
| Manhattan | Office Unavailable | Facility $116.70 |
| Merced | Office Unavailable | Facility $91.95 |
| Metropolitan Boston | Office Unavailable | Facility $102.26 |
| Metropolitan Kansas City | Office Unavailable | Facility $96.54 |
| Metropolitan Philadelphia | Office Unavailable | Facility $103.87 |
| Metropolitan St. Louis | Office Unavailable | Facility $97.29 |
| Miami | Office Unavailable | Facility $129.14 |
| Minnesota | Office Unavailable | Facility $84.90 |
| Mississippi | Office Unavailable | Facility $90.32 |
| Modesto | Office Unavailable | Facility $91.95 |
| Montana** | Office Unavailable | Facility $98.16 |
| Napa | Office Unavailable | Facility $98.47 |
| Nebraska | Office Unavailable | Facility $84.42 |
| Nevada** | Office Unavailable | Facility $94.93 |
| New Hampshire | Office Unavailable | Facility $96.54 |
| New Mexico | Office Unavailable | Facility $100.52 |
| New Orleans | Office Unavailable | Facility $99.72 |
| North Carolina | Office Unavailable | Facility $89.76 |
| North Dakota** | Office Unavailable | Facility $86.49 |
| Northern Nj | Office Unavailable | Facility $106.40 |
| Nyc Suburbs/Long Island | Office Unavailable | Facility $122.57 |
| Ohio | Office Unavailable | Facility $96.64 |
| Oklahoma | Office Unavailable | Facility $91.70 |
| Oxnard-Thousand Oaks-Ventura | Office Unavailable | Facility $96.00 |
| Portland | Office Unavailable | Facility $96.28 |
| Poughkpsie/N Nyc Suburbs | Office Unavailable | Facility $106.85 |
| Puerto Rico | Office Unavailable | Facility $98.12 |
| Queens | Office Unavailable | Facility $114.26 |
| Redding | Office Unavailable | Facility $91.95 |
| Rest Of California | Office Unavailable | Facility $91.95 |
| Rest Of Florida | Office Unavailable | Facility $107.24 |
| Rest Of Georgia | Office Unavailable | Facility $99.85 |
| Rest Of Illinois | Office Unavailable | Facility $107.58 |
| Rest Of Louisiana | Office Unavailable | Facility $95.10 |
| Rest Of Maine | Office Unavailable | Facility $89.17 |
| Rest Of Maryland | Office Unavailable | Facility $97.41 |
| Rest Of Massachusetts | Office Unavailable | Facility $96.18 |
| Rest Of Michigan | Office Unavailable | Facility $99.03 |
| Rest Of Missouri | Office Unavailable | Facility $94.97 |
| Rest Of New Jersey | Office Unavailable | Facility $104.27 |
| Rest Of New York | Office Unavailable | Facility $91.36 |
| Rest Of Oregon | Office Unavailable | Facility $92.27 |
| Rest Of Pennsylvania | Office Unavailable | Facility $95.50 |
| Rest Of Texas | Office Unavailable | Facility $95.28 |
| Rest Of Washington | Office Unavailable | Facility $95.30 |
| Rhode Island | Office Unavailable | Facility $97.84 |
| Riverside-San Bernardino-Ontario | Office Unavailable | Facility $98.25 |
| Sacramento-Roseville-Folsom | Office Unavailable | Facility $94.38 |
| Salinas | Office Unavailable | Facility $94.01 |
| San Diego-Chula Vista-Carlsbad | Office Unavailable | Facility $94.80 |
| San Francisco-Oakland-Berkeley (Marin Cnty) | Office Unavailable | Facility $101.20 |
| San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty) | Office Unavailable | Facility $100.53 |
| San Jose-Sunnyvale-Santa Clara (San Benito Cnty) | Office Unavailable | Facility $104.23 |
| San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty) | Office Unavailable | Facility $101.49 |
| San Luis Obispo-Paso Robles | Office Unavailable | Facility $92.79 |
| Santa Cruz-Watsonville | Office Unavailable | Facility $94.53 |
| Santa Maria-Santa Barbara | Office Unavailable | Facility $93.97 |
| Santa Rosa-Petaluma | Office Unavailable | Facility $95.31 |
| Seattle (King Cnty) | Office Unavailable | Facility $102.01 |
| South Carolina | Office Unavailable | Facility $93.74 |
| South Dakota** | Office Unavailable | Facility $85.11 |
| Southern Maine | Office Unavailable | Facility $90.75 |
| Stockton | Office Unavailable | Facility $91.95 |
| Suburban Chicago | Office Unavailable | Facility $114.36 |
| Tennessee | Office Unavailable | Facility $87.28 |
| Utah | Office Unavailable | Facility $95.01 |
| Vallejo | Office Unavailable | Facility $97.51 |
| Vermont | Office Unavailable | Facility $88.27 |
| Virgin Islands | Office Unavailable | Facility $98.12 |
| Virginia | Office Unavailable | Facility $92.07 |
| Visalia | Office Unavailable | Facility $91.95 |
| West Virginia | Office Unavailable | Facility $104.11 |
| Wisconsin | Office Unavailable | Facility $83.73 |
| Wyoming** | Office Unavailable | Facility $93.07 |
| Yuba City | Office Unavailable | Facility $91.95 |
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20931 billing questions
Can 20931 be reported without a primary spine procedure?
No. It is an add-on code and must be reported with a primary procedure.
How does 20931 differ from 20930?
20931 represents structural donor bone used as a supporting graft. Code 20930 is for morselized donor bone, such as chips or granules used to fill a fusion bed.
How does 20931 differ from 20938?
Both describe structural grafting for spine surgery, but 20931 is for donor bone and 20938 is for bone graft taken from the patient.
What documentation supports reporting 20931?
The operative report should identify the donor-derived graft as structural and describe its placement and role in the spinal reconstruction.
How does CMS treat payment for 20931?
CMS treats it as an add-on paid within the primary procedure’s global period.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
1,80920922,,Removal of fascia for graft,A,,6.76,11.41,,5.82,,1.51,19.68,14.09,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81020924,,Removal of tendon for graft,A,,6.51,6.33,NA,6.33,,1.23,14.07,14.07,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81120930,,Sp bone algrft morsel add-on,B,,0.00,0.00,,0.00,,0.00,0.00,0.00,9,XXX,0.00,0.00,0.00,9,9,9,9,9,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81220931,,Sp bone algrft struct add-on,A,,1.76,0.59,NA,0.59,,0.59,2.94,2.94,0,ZZZ,0.00,0.00,0.00,0,0,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81320932,,Osteoart algrft w/surf & b1,A,,12.68,4.04,NA,4.04,,2.70,19.42,19.42,0,ZZZ,0.00,0.00,0.00,0,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81420933,,Hemicrt intrclry algrft prtl,A,,11.64,3.71,NA,3.71,,2.48,17.83,17.83,0,ZZZ,0.00,0.00,0.00,0,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81520934,,Intercalary algrft compl,A,,12.68,4.04,NA,4.04,,2.70,19.42,19.42,0,ZZZ,0.00,0.00,0.00,0,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00