CPT code 58956: Ovarian cancer surgery, with hysterectomy and omentectomy2026 Medicare rate & RVUs in Oregon
This operation treats primary ovarian, fallopian-tube, or peritoneal malignancy through tumor resection with bilateral adnexal removal, omentectomy, and abdominal hysterectomy.
CMS doesn’t publish an office rate for 58956 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.
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On this page 9 sections
What 58956 covers
A gynecologic oncologist typically performs this abdominal operation to remove a primary malignancy involving the ovary, fallopian tube, or peritoneal surface. The operative work includes removing both tubes and ovaries, the omentum, and the uterus through an abdominal approach. It is used when the planned cancer operation includes all of these components, rather than an isolated ovarian removal or a more extensive radical debulking procedure.
Select the code from the documented operation, not diagnosis alone: the record should support resection of the primary tumor and each included operative component. The code represents bilateral removal already, so modifier 50 does not increase payment. It has a 90-day global period, including 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 other procedures are subject to the standard 50% reduction. Assistant-at-surgery payment may be available; 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 58956 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland, OR | Unavailable | $1,271.58 |
| Rest of Oregon | Unavailable | $1,211.89 |
How the 58956 rate is calculated
Each of 58956’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 · 58956
RVUs × geographic indexes × conversion factor
Work22.23
22.23 RVUs× 1.000 GPCI
Practice expense10.75
10.75 RVUs× 1.000 GPCI
Malpractice4.76
4.76 RVUs× 1.000 GPCI
Adjusted RVUs
37.7400
Conversion factor
$33.4009
Medicare rate
$1,260.55
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 58956
58956 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 58956
Ovarian cancer surgery, with hysterectomy and omentectomy
| 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 · 58956
Ovarian cancer surgery, with hysterectomy and omentectomy
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
58956 without 51 · national facility
$1,260.55
Ovarian cancer surgery, with hysterectomy and omentectomy
58956-51 · Second procedure: 50%
$630.28
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%).
58956 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 58950Cancer resectionWith BSO and omentectomy
- Choose 58950 when the malignancy resection includes bilateral tube-and-ovary removal and omentectomy but not abdominal hysterectomy. This code includes the hysterectomy.
- 58951Ovarian cancer surgeryPelvic lymphadenectomy
- 58951 describes a radical debulking operation that includes specified lymph-node sampling and limited peritoneal biopsies. This code covers the hysterectomy, bilateral adnexal removal, and omentectomy combination without those stated radical-dissection elements.
- 58940OophorectomyPartial or total, one or both
- 58940 is for ovary removal as an operation, rather than the combined resection of a primary gynecologic malignancy with omentectomy and abdominal hysterectomy.
58956 billing questions
How does this differ from 58950?
This code includes abdominal hysterectomy along with the bilateral tube-and-ovary removal and omentectomy. Use 58950 when the documented malignancy resection includes the latter components but not the hysterectomy.
Should modifier 50 be appended?
The code is already priced as bilateral. Modifier 50 does not increase its payment.
Are the hysterectomy, omentectomy, or bilateral adnexal removal separately reported?
They are components of this combined malignancy operation. Do not separately report an included component as though it were an independent procedure.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation; team surgery is not permitted.
How are other same-session procedures paid?
The highest-valued procedure is paid in full, and other procedures performed in the same session are subject to the standard multiple-procedure reduction.
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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