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Billing code 58900: Ovarian biopsyMedicare rate & RVUs

Surgical sampling of ovarian tissue for pathologic diagnosis, reported when a limited biopsy is performed rather than cyst removal or ovarian resection.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $389.12 for 58900 nationally in a facility.

Medicare rate · 58900

Ovarian biopsy

Work RVUs
6.43
Total RVUs
11.65
Global days
090

National rate · 2026

$389.12

Facility setting, before claim adjustments.

See every locality for 58900 →Billed by an NP, PA or therapist? →

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 10 sections
  1. Medicare rate
  2. What 58900 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

58900 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$355.66
Alaska*Unavailable$488.44
ArizonaUnavailable$379.45
ArkansasUnavailable$351.55
AtlantaUnavailable$399.54
AustinUnavailable$393.17
BakersfieldUnavailable$391.56
Baltimore/Surr. CntysUnavailable$411.47
BeaumontUnavailable$374.15
BrazoriaUnavailable$381.31

58900 rates by state

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

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Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
58900 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

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

RuleCMS valueWhat it means
Global period090Major surgery: the day before, the day of, and 90 days after are included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)2Already bilateral by definition: paid once at 100%.
Assistant at surgery (80/81/82/AS)2Paid.
Co-surgeons (62)1Permitted with supporting documentation.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.12/0.74/0.14Share of the payment for pre-op, the procedure itself, and post-op care.

Global surgery period · 58900

Ovarian biopsy

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.

  • 24Unrelated E/M visit by the same physician
  • 79Unrelated procedure (starts its own global period)
  • 58Staged, more extensive, or therapy procedure that was planned
  • 78Unplanned return to the operating room for a related complication
SurgeryVisit
Sep 23, 2026Jan 10, 2027

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

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%).

When to use modifier 51

58900 compared with similar codes

Compare codes · National

4 codes, side by side

  • 58900

    Ovarian biopsy6.43 wRVU

    Not priced

  • 58920

    Ovarian surgery11.65 wRVU

    Not priced

  • 58925

    Ovarian cystectomy12.12 wRVU

    Not priced

  • 58940

    Oophorectomy8.01 wRVU

    Not priced

How to choose

58920Ovarian surgery
58900 samples ovarian tissue for diagnosis. 58920 describes removal of part of an ovary.
58925Ovarian cystectomy
Choose 58925 when the surgeon removes an ovarian cyst; 58900 is for limited tissue sampling, not cyst removal.
58940Oophorectomy
58940 is for removing an ovary. 58900 is for sampling tissue while leaving the ovary in place.

Codes related to 58900

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

Codes related to 58900
CodeHow it relatesNational office range
Used instead
58920Ovarian surgeryUsed when part of an ovary is removed rather than taking a limited diagnostic sample.No office rate
58925Ovarian cystectomyUsed for removal of an ovarian cyst rather than biopsy alone.No office rate
58940OophorectomyUsed when an ovary is removed rather than sampled.No office rate

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
RVUs for 58900PPRRVU2026_Oct_nonQPP.csv, line 6,607 (RVU26D)

Open CMS sourceHow we calculate rates

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