20936
No office rateSp bone agrft local add-on
20936 represents local autologous bone graft used in spinal surgery. Use 20939 for marrow aspiration performed for grafting, not for the local bone graft itself.
On this page
CMS RVU26D · Effective 2026-10-01
20939 Marrow aspiration Medicare reimbursement rates in Wyoming
Reports marrow aspiration, commonly from the iliac crest, for use as graft material during spinal surgery when billed with a qualifying primary procedure. Compare 20939 office and facility rates across CMS payment localities in Wyoming.
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 20939 in Wyoming?
Wyoming has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$58.51
1 of 1 localities have a supported rate.
Payment area: Wyoming**
One mapped payment locality.
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.
Spinal surgery
About 20939: Bone marrow aspiration for spinal grafting
Reports marrow aspiration, commonly from the iliac crest, for use as graft material during spinal surgery when billed with a qualifying primary procedure.
During spinal fusion, the surgeon obtains marrow aspirate, commonly from the posterior iliac crest, to combine with graft material and support fusion. The service is performed by the operating spine surgeon in the surgical setting. It represents marrow collection for grafting, not diagnostic marrow aspiration or a code for harvesting structural or morselized bone.
Report 20939 only as an add-on with a qualifying primary spine procedure; it is not reported alone. Documentation should identify the aspiration, its grafting purpose, and the associated spinal procedure, distinguishing it from any separately documented bone harvest. CMS places payment within the primary procedure's global period, so related postoperative care follows that procedure's global period. For bilateral reporting, use modifier 50; CMS pays the bilateral procedure at 150%.
CMS billing rules for 20939
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- Bilateral procedures
- Bilateral procedure with modifier 50 is paid at 150%.
Where the value comes from
- Work RVU1.13 · 61%
- Practice expense (office) RVU0.37 · 20%
- Malpractice RVU0.34 · 18%
12K
Medicare services in 2024 · #1375 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.
20939 compared with similar codes
Office rates for Wyoming, from the same CMS release.
No office rate
20937 describes morselized autologous bone graft for spinal surgery. It does not represent the marrow aspiration captured by 20939.
No office rate
20938 describes structural autologous bone graft for spinal surgery. 20939 instead reports marrow aspiration for grafting.
20930
No office rateSp bone algrft morsel add-on
20930 represents morselized allograft used in spinal surgery. 20939 reports marrow aspiration, not the allograft material.
Compare 20939 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.
1 of 1 payment localities
Wyoming** →
Office / nonfacility
Unavailable
Facility
$58.51
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 20939 in Wyoming**.
PPRRVU2026_Oct_nonQPP.csv
1,819
- Code
- 20939
- Physician work
- 1.13
- Practice expense
- 0.37
- Malpractice
- 0.34
GPCI2026.csv
112
- Locality
- Wyoming**
- Physician work
- 1.000
- Practice expense
- 1.000
- Malpractice
- 0.740
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 1.13 | × 1.000 | 1.1300 |
| Practice expense | 0.37 | × 1.000 | 0.3700 |
| Malpractice | 0.34 | × 0.740 | 0.2516 |
| Total RVUs | 1.7516 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Wyoming**$58.51
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 1.13 | 1 |
| Practice expense | 0.37 | 1 |
| Malpractice | 0.34 | 0.74 |
(1.13 × 1 + 0.37 × 1 + 0.34 × 0.74) × $33.4009 = $58.51
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
20939 billing questions
Can 20939 be reported by itself?
No. It is an add-on for marrow aspiration used in spinal grafting and must be reported with a qualifying primary spine procedure.
What documentation supports reporting 20939?
Document the marrow aspiration, its use for grafting, and the associated spinal procedure. Clarify separately performed bone harvesting when applicable.
How is bilateral reporting handled?
For a bilateral procedure, report modifier 50. CMS pays the bilateral service at 150%.
Is 20939 the code for harvesting bone graft?
No. It represents marrow aspiration for grafting; codes such as 20936, 20937, and 20938 describe different autologous bone graft services.
How does the global period affect 20939?
CMS pays it within the primary procedure's global period. Related postoperative care follows that 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.
1,81620936,,Sp bone agrft local 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
1,81720937,,Sp bone agrft morsel add-on,A,,2.72,0.90,NA,0.90,,0.79,4.41,4.41,0,ZZZ,0.00,0.00,0.00,0,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81820938,,Sp bone agrft struct add-on,A,,2.94,0.99,NA,0.99,,0.96,4.89,4.89,0,ZZZ,0.00,0.00,0.00,0,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,81920939,,Bone marrow aspir bone grfg,A,,1.13,0.37,NA,0.37,,0.34,1.84,1.84,0,ZZZ,0.00,0.00,0.00,0,1,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,82020950,,Mntr intrstitial fluid press,A,,1.23,6.88,,1.05,,0.22,8.33,2.50,0,000,0.00,0.00,0.00,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,82120955,,Fibula bone graft microvasc,A,,39.25,21.35,NA,21.35,,7.30,67.90,67.90,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,82220956,,Iliac bone graft microvasc,A,,40.15,21.79,NA,21.79,,8.58,70.52,70.52,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
10902402,WA,99,REST OF WASHINGTON,1.013,1.053,0.761
11011402,WV,16,WEST VIRGINIA,1.000,0.869,1.431
11106302,WI,00,WISCONSIN,1.000,0.958,0.308
11203602,WY,21,WYOMING**,1.000,1.000,0.740
113"MAC Assignments as of November 22, 2023",,,,,,
114,,,,,,
115*Work GPCI reflects a 1.5 floor in Alaska established by the MIPPA.,,,,,,