CPT code 27626: Ankle synovectomy, extensive synovectomy2026 Medicare rate & RVUs in Michigan
Reported for open removal of extensive abnormal synovial tissue from the ankle joint, such as in chronic proliferative or inflammatory synovitis.
CMS doesn’t publish an office rate for 27626 in Michigan.
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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What 27626 covers
An orthopedic surgeon uses an open approach to remove extensive diseased synovial tissue from the ankle joint. This may be performed for persistent proliferative synovitis, including synovitis associated with inflammatory arthritis, when the surgeon determines that a broad synovectomy is needed. The arthrotomy provides access to the joint; tissue sampling performed as part of the procedure is included in the service. This is an open operation, distinct from arthroscopic synovectomy.
Choose this code when the operative report supports an extensive synovectomy, rather than the less extensive procedure represented by 27625. Document the affected ankle, the approach, the distribution and extent of abnormal synovium removed, and the reason for surgery. The service has a 90-day global period, including the day-before preoperative visit and related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Bilateral reporting with modifier 50 is paid at 150%. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted.
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 27626 pays more and less in Michigan
| Payment locality | Office | Facility |
|---|---|---|
| Detroit, MI | Unavailable | $586.79 |
| Rest of Michigan | Unavailable | $550.43 |
How the 27626 rate is calculated
Each of 27626’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 · 27626
RVUs × geographic indexes × conversion factor
Work8.87
8.87 RVUs× 1.000 GPCI
Practice expense6.69
6.69 RVUs× 1.000 GPCI
Malpractice1.33
1.33 RVUs× 1.000 GPCI
Adjusted RVUs
16.8900
Conversion factor
$33.4009
Medicare rate
$564.14
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 27626
27626 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27626
Ankle synovectomy, extensive synovectomy
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.10/0.69/0.21 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 27626
Ankle synovectomy, extensive synovectomy
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
27626 without 50 · national facility
$564.14
Ankle synovectomy, extensive synovectomy
27626-50 · Bilateral: 150%
$846.21
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
27626 compared with similar codes
Compare codes · National
27626 vs 27625 vs 27620: Medicare rates
How to choose
- 27625Ankle synovectomyStandard extent
- Both describe open ankle synovectomy through arthrotomy. Select 27626 when the documentation supports extensive removal; 27625 represents the less extensive procedure.
- 27620Ankle arthrotomyWith or without biopsy
- This code is for extensive synovectomy. Use 27620 when the open ankle-joint work is exploration or another covered treatment without the extensive synovectomy.
27626 billing questions
How do I distinguish 27626 from 27625?
Use 27626 when the operative documentation supports an extensive ankle synovectomy. Use 27625 for the less extensive open synovectomy.
Can the biopsy performed during the arthrotomy be billed separately?
Biopsy performed as part of this ankle synovectomy is included in the service. The operative note should describe the synovium removed and any tissue submitted for examination.
Can 27626 be reported for an arthroscopic synovectomy?
No. This code describes an open synovectomy through arthrotomy; arthroscopic ankle synovectomy codes distinguish partial from major synovectomy.
What modifiers and payment rules should I check?
Modifier 50 applies to bilateral reporting, which CMS pays at 150%. The procedure has a 90-day global period, and same-session multiple procedures are subject to the standard reduction.
May an assistant or co-surgeon be reported?
CMS permits payment for an assistant at surgery. Co-surgeons and team surgery are not permitted 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 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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