CPT code 58900: Ovarian biopsy, tissue sampling only2026 Medicare rate & RVUs in Texas
Surgical sampling of ovarian tissue for pathologic diagnosis, reported when a limited biopsy is performed rather than cyst removal or ovarian resection.
CMS doesn’t publish an office rate for 58900 in Texas.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 58900 covers
An ovarian biopsy removes a limited piece of ovarian tissue for histologic evaluation rather than removing a cyst or part or all of the ovary. A gynecologist or gynecologic oncologist may obtain the sample during an abdominal or pelvic operation when tissue diagnosis is needed, such as evaluation of a suspicious ovarian lesion. The specimen is sent for pathologic examination; this code represents the surgeon’s sampling service, not the pathology interpretation.
Report 58900 when the operative record supports a distinct ovarian tissue biopsy and the work is not simply part of a more extensive removal. Document the sampled ovary, indication, approach, and specimen. CMS prices the code as bilateral, so modifier 50 does not increase payment. It has a 90-day global period, including the day-before preoperative visit and related postoperative care. When multiple procedures occur in one session, the highest-valued procedure is paid in full and the others at 50%. 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 58900 pays more and less in Texas
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
8 of 8 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Austin, TX | Unavailable | $393.17 |
| Beaumont, TX | Unavailable | $374.15 |
| Brazoria, TX | Unavailable | $381.31 |
| Dallas, TX | Unavailable | $385.15 |
| Fort Worth, TX | Unavailable | $384.27 |
| Galveston, TX | Unavailable | $383.39 |
| Houston, TX | Unavailable | $404.07 |
| Rest of Texas | Unavailable | $378.49 |
How the 58900 rate is calculated
Each of 58900’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 · 58900
RVUs × geographic indexes × conversion factor
Work6.43
6.43 RVUs× 1.000 GPCI
Practice expense4.09
4.09 RVUs× 1.000 GPCI
Malpractice1.13
1.13 RVUs× 1.000 GPCI
Adjusted RVUs
11.6500
Conversion factor
$33.4009
Medicare rate
$389.12
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 58900
58900 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 58900
Ovarian biopsy, tissue sampling only
| 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 · 58900
Ovarian biopsy, tissue sampling only
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
58900 without 51 · national facility
$389.12
Ovarian biopsy, tissue sampling only
58900-51 · Second procedure: 50%
$194.56
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%).
58900 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 58920Ovarian surgeryPartial tissue removal
- 58900 samples ovarian tissue for diagnosis. 58920 describes removal of part of an ovary.
- 58925Ovarian cystectomyCyst removal, ovary preserved
- Choose 58925 when the surgeon removes an ovarian cyst; 58900 is for limited tissue sampling, not cyst removal.
- 58940OophorectomyPartial or total, one or both
- 58940 is for removing an ovary. 58900 is for sampling tissue while leaving the ovary in place.
58900 billing questions
When should 58900 be used instead of an ovarian cystectomy?
Use 58900 for limited tissue sampling for diagnosis. Use 58925 when the surgeon removes an ovarian cyst rather than taking a biopsy sample.
Can the biopsy be reported separately during an oophorectomy?
Do not separately report a biopsy that is part of the same ovarian removal. The removal captures the tissue-taking work from that ovary.
Should modifier 50 be added when both ovaries are biopsied?
No. CMS prices 58900 as bilateral, and modifier 50 does not increase payment.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
What documentation supports 58900 and co-surgeon billing?
Record the clinical reason for sampling, the ovary sampled, the biopsy performed, and the specimen submitted. Co-surgeon payment requires supporting documentation; assistant-at-surgery payment may be made.
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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