No office rate
Both cover deep back or flank tumor excision; 21933 is for tumors 5 cm or larger, while 21932 is for smaller tumors.
On this page
CMS RVU26D · Effective 2026-10-01
21933 Back tumor excision Medicare reimbursement rates in Idaho
Excision of a soft tissue tumor at least 5 cm across from beneath the back or flank fascia, including an intramuscular tumor. Compare 21933 office and facility rates across CMS payment localities in Idaho.
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 21933 in Idaho?
Idaho 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
$633.65
1 of 1 localities have a supported rate.
Payment area: Idaho
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.
Soft tissue surgery
About 21933: Deep back tumor excision, 5 cm or larger
Excision of a soft tissue tumor at least 5 cm across from beneath the back or flank fascia, including an intramuscular tumor.
This service removes a soft tissue tumor measuring 5 cm or more that lies beneath the fascia of the back or flank, including a tumor within muscle. A surgeon typically performs the excision in an operating room or an appropriately equipped outpatient setting. The code distinguishes a deep tumor from a subcutaneous lesion and distinguishes tumors at least 5 cm from smaller deep tumors.
Choose the code based on the tumor’s documented depth and size, not the length of the incision. The operative report should support the back or flank site, the tumor’s deep location, its dimensions, and the excision performed. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in one session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Bilateral adjustment is inappropriate for this code. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted.
CMS billing rules for 21933
- Global period
- Major surgery with a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Assistant at surgery may be paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU10.85 · 52%
- Practice expense (office) RVU7.47 · 36%
- Malpractice RVU2.64 · 13%
3.1K
Medicare services in 2024 · #2143 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.
21933 compared with similar codes
Office rates for Idaho, from the same CMS release.
No office rate
21931 applies to a subcutaneous lesion at least 3 cm across. Use 21933 for a tumor at least 5 cm across that lies beneath the fascia.
No office rate
21936 describes resection of a back or flank tumor 5 cm or larger; 21933 describes excision of a deep tumor of that size. Select based on the procedure performed and documented.
$496.32
21925 is for deep soft tissue sampling by biopsy; 21933 is for excision of the deep tumor measuring at least 5 cm.
Compare 21933 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
Idaho →
Office / nonfacility
Unavailable
Facility
$633.65
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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 21933 in Idaho.
PPRRVU2026_Oct_nonQPP.csv
2,038
- Code
- 21933
- Physician work
- 10.85
- Practice expense
- 7.47
- Malpractice
- 2.64
GPCI2026.csv
47
- Locality
- Idaho
- Physician work
- 1.000
- Practice expense
- 0.920
- Malpractice
- 0.473
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 10.85 | × 1.000 | 10.8500 |
| Practice expense | 7.47 | × 0.920 | 6.8724 |
| Malpractice | 2.64 | × 0.473 | 1.2487 |
| Total RVUs | 18.9711 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Idaho$633.65
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 10.85 | 1 |
| Practice expense | 7.47 | 0.92 |
| Malpractice | 2.64 | 0.473 |
(10.85 × 1 + 7.47 × 0.92 + 2.64 × 0.473) × $33.4009 = $633.65
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.
21933 billing questions
When should 21933 be selected instead of 21932?
Both describe excision of a deep soft tissue tumor of the back or flank. Select 21933 when the tumor is at least 5 cm; 21932 is for a smaller deep tumor.
How does 21933 differ from 21931?
21933 is for a deep tumor at least 5 cm across. 21931 describes excision of a subcutaneous back or flank lesion at least 3 cm across.
Can a biopsy and the excision be reported together?
A biopsy code describes sampling rather than removal of the tumor. The operative documentation should establish whether the service was a diagnostic biopsy or an excision; do not report both for the same work.
Does modifier 50 apply when tumors are removed on both sides?
CMS identifies bilateral adjustment as inappropriate for 21933. Do not use modifier 50 to claim a bilateral adjustment for this code.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
May an assistant or another surgeon be reported?
An assistant at surgery may be paid. CMS does not permit co-surgeons or team surgery for this code.
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.
2,03521930,,Exc back les sc < 3 cm,A,,4.82,10.30,,4.63,,1.07,16.19,10.52,0,090,0.10,0.69,0.21,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,03621931,,Exc back les sc 3 cm/>,A,,6.71,5.21,NA,5.21,,1.66,13.58,13.58,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,03721932,,Exc back tum deep < 5 cm,A,,9.57,6.96,NA,6.96,,2.25,18.78,18.78,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,03821933,,Exc back tum deep 5 cm/>,A,,10.85,7.47,NA,7.47,,2.64,20.96,20.96,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,03921935,,Resect back tum < 5 cm,A,,15.33,9.68,NA,9.68,,3.61,28.62,28.62,0,090,0.10,0.69,0.21,2,0,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,04021936,,Resect back tum 5 cm/>,A,,21.99,11.94,NA,11.94,,5.23,39.16,39.16,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,04122010,,I&d p-spine c/t/cerv-thor,A,,12.43,12.05,NA,12.05,,3.99,28.47,28.47,0,090,0.10,0.69,0.21,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4410212,GA,01,ATLANTA,1.003,1.016,1.201
4510212,GA,99,REST OF GEORGIA,1.000,0.892,1.192
4601212,HI,01,"HAWAII, GUAM",1.000,1.137,0.579
4702202,ID,00,IDAHO,1.000,0.920,0.473
4806102,IL,16,CHICAGO,1.007,1.005,2.295
4906102,IL,12,EAST ST. LOUIS,1.000,0.920,2.014
5006102,IL,15,SUBURBAN CHICAGO,1.007,1.027,1.772