$693.62
Use 17311 for the first Mohs stage at the head, neck, hands, feet, or genitalia. Code 17313 is for the trunk, arms, or legs.
On this page
CMS RVU26D · Effective 2026-10-01
17313 Mohs surgery Medicare reimbursement rates in Colorado
Mohs surgery for a first tissue stage on the trunk, arms, or legs, including mapped specimen processing and microscopic margin assessment by the surgeon. Compare 17313 office and facility rates across CMS payment localities in Colorado.
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 17313 in Colorado?
Colorado 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
$651.92
1 of 1 localities have a supported rate.
Payment area: Colorado
One mapped payment locality.
Facility setting
$259.58
1 of 1 localities have a supported rate.
Payment area: Colorado
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.
Dermatologic surgery
About 17313: Mohs first stage, trunk or extremity
Mohs surgery for a first tissue stage on the trunk, arms, or legs, including mapped specimen processing and microscopic margin assessment by the surgeon.
A Mohs surgeon removes a skin cancer in mapped tissue layers, processes and examines the tissue microscopically, and uses the findings to guide further removal while preserving uninvolved tissue. This code represents the first stage for a lesion on the trunk, an arm, or a leg. It is commonly used for cutaneous basal cell or squamous cell carcinomas treated in a dermatology office or hospital outpatient setting.
Report one first-stage service for the treated site, with the number of tissue blocks documented; the first stage includes up to five blocks. Record the anatomic site, mapping, blocks examined, and histologic findings. Additional stages are reported with 17314, and additional blocks beyond the included amount with 17315. Same-day preoperative and postoperative care is included in the 0-day global period. When other procedures are performed in the same session, the highest-valued procedure is paid in full and the others are subject to the standard multiple-procedure reduction. Modifier 50 is inappropriate. Medicare does not pay an assistant at surgery; co-surgeons and team surgery are not permitted.
CMS billing rules for 17313
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is 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
- Statutory restriction: assistant at surgery is not paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU5.42 · 29%
- Practice expense (office) RVU12.80 · 68%
- Malpractice RVU0.53 · 3%
205.7K
Medicare services in 2024 · #382 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.
17313 compared with similar codes
Office rates for Colorado, from the same CMS release.
$402.20
17314 reports an additional Mohs stage on the trunk, arms, or legs; 17313 reports the first stage at those sites.
$82.09
17315 reports additional tissue blocks beyond the included amount, rather than a separate stage.
$419.88
17312 reports an additional Mohs stage at sites assigned to 17311, not the trunk, arms, or legs.
Compare 17313 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
Colorado →
Office / nonfacility
$651.92
Facility
$259.58
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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 17313 in Colorado.
PPRRVU2026_Oct_nonQPP.csv
1,648
- Code
- 17313
- Physician work
- 5.42
- Practice expense
- 12.80
- Malpractice
- 0.53
GPCI2026.csv
37
- Locality
- Colorado
- Physician work
- 1.012
- Practice expense
- 1.064
- Malpractice
- 0.781
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 5.42 | × 1.012 | 5.4850 |
| Practice expense | 12.80 | × 1.064 | 13.6192 |
| Malpractice | 0.53 | × 0.781 | 0.4139 |
| Total RVUs | 19.5182 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Colorado$651.92
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 5.42 | 1.012 |
| Practice expense | 12.8 | 1.064 |
| Malpractice | 0.53 | 0.781 |
(5.42 × 1.012 + 12.8 × 1.064 + 0.53 × 0.781) × $33.4009 = $651.92
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 5.42 | 1.012 |
| Practice expense | 1.76 | 1.064 |
| Malpractice | 0.53 | 0.781 |
(5.42 × 1.012 + 1.76 × 1.064 + 0.53 × 0.781) × $33.4009 = $259.58
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.
17313 billing questions
How is 17313 distinguished from 17311?
Choose 17313 for the first Mohs stage on the trunk, arms, or legs. Code 17311 is for the first stage at specified sites including the head, neck, hands, feet, or genitalia.
How many tissue blocks are included?
The first stage includes up to five tissue blocks. Report additional blocks with 17315, and document the block count.
How are later Mohs stages reported?
For a lesion on the trunk, arm, or leg, report additional stages with 17314. Document each stage and its tissue findings.
Can modifier 50 be used for bilateral lesions?
No. Modifier 50 is inappropriate for this service; the CMS bilateral adjustment does not apply.
Can an assistant or co-surgeon be reported?
Medicare does not pay an assistant at surgery for this service. Co-surgeons and team surgery are not permitted.
What same-day care is included?
The 0-day global period includes the related preoperative and postoperative care provided on the procedure date.
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.
1,64517286,,Dstr mal ls f/e/e/n/l/m>4.0,A,,4.37,5.71,,1.89,,0.46,10.54,6.72,0,010,0.10,0.80,0.10,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,64617311,,Mohs 1 stage h/n/hf/g,A,,6.05,13.33,,1.95,,0.59,19.97,8.59,0,000,0.00,0.00,0.00,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,64717312,,Mohs addl stage,A,,3.22,8.51,,1.03,,0.33,12.06,4.58,0,ZZZ,0.00,0.00,0.00,0,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,64817313,,Mohs 1 stage t/a/l,A,,5.42,12.80,,1.76,,0.53,18.75,7.71,0,000,0.00,0.00,0.00,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,64917314,,Mohs addl stage t/a/l,A,,2.98,8.27,,0.91,,0.29,11.54,4.18,0,ZZZ,0.00,0.00,0.00,0,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,65017315,,Mohs surg addl block,A,,0.85,1.45,,0.28,,0.07,2.37,1.20,0,ZZZ,0.00,0.00,0.00,0,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,65117340,,Cryotherapy for acne,A,,0.75,0.76,,0.44,,0.07,1.58,1.26,0,010,0.10,0.80,0.10,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3401112,CA,69,VISALIA,1.017,1.096,0.536
3501112,CA,70,YUBA CITY,1.017,1.096,0.536
3601112,CA,75,REST OF CALIFORNIA,1.017,1.096,0.536
3704112,CO,01,COLORADO,1.012,1.064,0.781
3813102,CT,00,CONNECTICUT,1.020,1.077,1.210
3912202,DC,01,DC + MD/VA SUBURBS,1.054,1.178,1.113
4012102,DE,01,DELAWARE,1.005,0.988,0.899