CPT code 28310: Toe osteotomy, first toe, proximal phalanx2026 Medicare rate & RVUs in Riverside, CA

In Riverside, CA, Medicare pays $599.81 for 28310 in the office and $363.69 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 28310 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 28310 covers

This procedure uses a bone cut in the proximal phalanx of the great toe to change its alignment or length. Foot and ankle orthopedic surgeons and podiatrists may perform it for a phalangeal deformity, such as hallux valgus interphalangeus, or as an Akin-type correction during hallux valgus surgery. It is performed in an operating room or, in selected cases, an office-based procedure setting. It addresses the toe bone, not the first metatarsal.

Report the code when the operative work is an osteotomy of the great toe’s proximal phalanx. The operative report should identify the bone, the deformity and the correction performed, and clarify whether the osteotomy is part of a broader hallux valgus procedure. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur 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 is restricted; co-surgeons require 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.

How Riverside, CA compares for 28310

Across 109 of 109 payment localities, the office rate for 28310 runs from $503.33 in Arkansas to $734.45 in San Benito County, CA. Riverside, CA pays $599.81. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

28310 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 28310 in every payment locality

How the 28310 rate is calculated

Each of 28310’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.

Payment rules and modifiers for 28310

28310 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 50

Codes related to 28310

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 28310 has changed in Riverside, CA

Price 28310 for an earlier date of service

Where the Riverside, CA rate applies

Riverside, CA is a Medicare payment area, not a city. Our Census mapping connects it to 127 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.

• Ontario
• Riverside
• San Bernardino
• Adelanto
• Aguanga
• Anza
• Apple Valley
• Baker

Browse all communities in California

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

Open CMS sourceHow we calculate rates