CPT code 58940: Oophorectomy, partial or total, one or both2026 Medicare rate & RVUs in Montana

In Montana, Medicare pays $515.26 for 58940 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 58940 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 58940 covers

A gynecologic surgeon removes part or all of an ovary through an open abdominal operation. Typical situations include an ovary that cannot be preserved because of torsion or a benign ovarian lesion. The procedure may involve one or both ovaries and may be performed in a hospital operating room or another surgical facility.

Choose this code when ovarian tissue is removed, rather than when a cyst is excised while preserving the ovary, a biopsy is taken, or a distinct oncologic operation is performed. The operative report should identify the tissue removed, the indication, the approach, and any additional procedures. CMS prices the code as bilateral, so modifier 50 does not increase payment. It has a 90-day global period that includes the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and others at 50%. An assistant at surgery may be paid; 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 Montana compares for 58940

Across 109 of 109 payment localities, the facility rate for 58940 runs from $461.24 in Arkansas to $636.59 in Alaska. Montana pays $515.26. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

58940 rates by state

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

See 58940 in every payment locality

How the 58940 rate is calculated

Each of 58940’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 58940

58940 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 51

Codes related to 58940

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

How 58940 has changed in Montana

Price 58940 for an earlier date of service

Where the Montana rate applies

Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.

• Absarokee
• Acton
• Alberton
• Alder
• Alzada
• Amsterdam
• Anaconda-Deer Lodge County
• Antelope

Browse all communities in Montana

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