Billing code 58920: Ovarian surgeryMedicare rate & RVUs in Oregon
Reports surgical removal of part of an ovary while ovarian tissue remains, rather than cyst-only excision or removal of the entire ovary.
CMS doesn’t publish an office rate for 58920 in Oregon.
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 58920 covers
A gynecologic surgeon removes a segment of ovarian tissue while leaving some of the ovary in place. The operation may be performed to excise a focal area or as a tissue-sparing ovarian procedure. The operative report should identify the ovary or ovaries treated, the amount and type of tissue removed, and what ovarian tissue remained. This distinguishes partial ovarian removal from taking a biopsy, removing only a cyst, or removing an entire ovary.
Report the service for partial ovarian tissue excision, whether one or both ovaries are treated; CMS pricing already accounts for bilateral work, so modifier 50 does not increase payment. The major-surgery global period 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% multiple-procedure reduction. Assistant-at-surgery services 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.
Where 58920 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $639.25 |
| Rest Of Oregon | Unavailable | $610.25 |
How the 58920 rate is calculated
Each of 58920’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 · 58920
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 11.65Practice expense 5.20Malpractice 2.05
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 58920
58920 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 58920
Ovarian surgery
| 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) | 2 | Already bilateral by definition: paid once at 100%. |
| 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) | 0.12/0.74/0.14 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 58920
Ovarian surgery
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 51 · payment effect
With and without the modifier
58920 without 51 · national facility
$631.28
Ovarian surgery
58920-51 · Second procedure: 50%
$315.64
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
58920 compared with similar codes
Compare codes
58920 vs 58925 vs 58940 vs 58900: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 58925Ovarian cystectomy
- Use 58920 when a portion of ovarian tissue is removed. Use 58925 when the surgeon excises an ovarian cyst while preserving the surrounding ovary.
- 58940Oophorectomy
- 58940 describes a broader partial or total oophorectomy service. Choose based on the documented extent and nature of the ovarian removal.
- 58900Ovarian biopsy
- 58900 is for obtaining an ovarian biopsy specimen. It does not describe removal of ovarian tissue as the operative treatment.
58920 billing questions
How is partial ovarian removal different from ovarian cystectomy?
This code describes removal of ovarian tissue itself. For an operation that removes a cyst while preserving the surrounding ovary, consider 58925.
Should modifier 50 be added when both ovaries are treated?
CMS pricing for this code already accounts for bilateral treatment. Modifier 50 does not increase payment.
What should the operative note document?
Document which ovary or ovaries were treated, the ovarian tissue removed, and the tissue that remained. The details should support partial ovarian removal rather than biopsy, cyst-only excision, or complete removal.
Is routine postoperative care separately reported?
Related postoperative care during the 90-day global period is included. The global period also includes the day-before preoperative visit.
How are other procedures in the same session paid?
Under the standard multiple-procedure reduction, the highest-valued procedure is paid in full and other procedures are subject to a 50% reduction.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery services may be paid. Co-surgeons are paid only with 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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