Billing code 28800: Foot amputationMedicare rate & RVUs in Illinois
Reports removal of the foot through the midtarsal joint when disease or injury requires amputation proximal to the forefoot while retaining the heel.
CMS doesn’t publish an office rate for 28800 in Illinois.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 28800 covers
This operation removes the foot at the midtarsal level, commonly described as a Chopart amputation, while leaving the heel portion of the foot. It may be performed for extensive infection, gangrene, nonhealing ischemic tissue, or severe trauma when a more distal amputation cannot adequately remove affected tissue. An orthopedic or foot-and-ankle surgeon typically performs it in an operating room; vascular surgeons may be involved in care for ischemic disease.
Report the code when the operative level is the midfoot, not the metatarsals or an individual toe. The operative report should establish the amputation level, laterality, indication, and extent of tissue removal. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures in one session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment may be made; co-surgeon payment requires supporting documentation, and team surgery is 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 28800 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Chicago | Unavailable | $538.31 |
| East St. Louis | Unavailable | $512.19 |
| Rest Of Illinois | Unavailable | $495.63 |
| Suburban Chicago | Unavailable | $524.25 |
How the 28800 rate is calculated
Each of 28800’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 · 28800
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 8.57Practice expense 5.12Malpractice 1.02
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 28800
28800 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 28800
Foot amputation
| 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) | 1 | Permitted with supporting documentation. |
| 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 · 28800
Foot amputation
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
28800 without 50 · national facility
$491.33
Foot amputation
28800-50 · Bilateral: 150%
$737.00
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).
28800 compared with similar codes
Compare codes
28800 vs 28805 vs 28810 vs 28820: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 28805Foot amputation
- Use 28805 when the amputation passes through the metatarsal bones. This code describes the more proximal midtarsal level.
- 28810Ray amputation
- Use 28810 for removal of a toe together with its metatarsal, rather than amputation of the foot at the midtarsal level.
- 28820Toe amputation
- Use 28820 for amputation of a toe; it does not describe removal of the foot through the midtarsal joint.
28800 billing questions
How is this distinguished from a transmetatarsal amputation?
Use this code when the operative amputation is through the midtarsal joint. An amputation through the metatarsal bones is reported with 28805.
Are routine postoperative visits separately reported?
Related postoperative care during the 90-day global period is included, along with the day-before preoperative visit.
How is a bilateral procedure reported?
CMS identifies this as a bilateral procedure; reporting modifier 50 results in payment at 150%.
What documentation supports the code?
The operative report should identify the midtarsal amputation level, side, indication, and extent of tissue removed.
Can an assistant or co-surgeon be paid?
Assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation; team surgery is not permitted.
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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