CPT code 27310: Knee arthrotomy, exploration, drainage, or foreign body2026 Medicare rate & RVUs in Arizona

In Arizona, Medicare pays $670.06 for 27310 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 27310 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 27310 covers

An orthopedic surgeon opens the knee joint to inspect its interior, drain infected material, or remove a foreign object. A typical setting is the operating room, including surgery for a suspected or confirmed septic knee joint. The procedure is open: it is not the arthroscopic approach used to inspect or treat the joint through small portals.

Report 27310 when the operative work is open exploration, drainage, or foreign-body removal, and document the approach, indication, intra-articular findings, and work performed. The code has a 90-day global period, which includes the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur 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-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.

How Arizona compares for 27310

Across 109 of 109 payment localities, the facility rate for 27310 runs from $614.27 in Arkansas to $840.32 in Alaska. Arizona pays $670.06. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

27310 rates by state

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

See 27310 in every payment locality

How the 27310 rate is calculated

Each of 27310’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 27310

27310 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 27310

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

How 27310 has changed in Arizona

Price 27310 for an earlier date of service

Where the Arizona rate applies

Arizona is a Medicare payment area, not a city. Our Census mapping connects it to 467 cities and communities in Arizona. Some span more than one payment area; confirm with the service ZIP.

• Aguila
• Ajo
• Ak Chin
• Ak-Chin Village
• Alamo Lake
• Ali Chuk
• Ali Chukson
• Ali Molina

Browse all communities in Arizona

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