Billing code 58800: Ovarian cyst drainageMedicare rate & RVUs in Guam
Reports drainage of one or more ovarian cysts through a vaginal approach, performed by a gynecologist when cyst drainage rather than excision is undertaken.
Medicare pays $366.48 for 58800 in the office in Guam (Hawaii, Guam). Which amount applies depends on the service address.
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 58800 covers
A gynecologist reports this service when one or more ovarian cysts are drained through a vaginal approach. The operative work is directed at the cyst or cysts and their fluid contents, rather than removing the cyst wall as a cystectomy. The code includes unilateral or bilateral drainage, so the approach and the procedure performed should be clear in the operative report.
Document the ovarian cyst diagnosis, vaginal route, side or sides treated, and drainage performed. This major-surgery code has a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are included. 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% multiple-procedure reduction. The code is priced as bilateral, so modifier 50 does not increase payment. Medicare does not pay an assistant at surgery for this code; co-surgeons and team surgery are 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.
58800 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $366.48 | $284.83 |
How the 58800 rate is calculated
Each of 58800’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 · 58800
RVUs × geographic indexes × conversion factor
Work4.50
4.50 RVUs× 1.000 GPCI
Practice expense5.29
5.29 RVUs× 1.000 GPCI
Malpractice0.79
0.79 RVUs× 1.000 GPCI
Adjusted RVUs
10.5800
Conversion factor
$33.4009
Medicare rate
$353.38
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 58800
58800 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 58800
Ovarian cyst drainage
| 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) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| 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 · 58800
Ovarian cyst drainage
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
58800 without 51 · national office
$353.38
Ovarian cyst drainage
58800-51 · Second procedure: 50%
$176.69
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%).
58800 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 58805Cyst drainage
- Both codes describe ovarian cyst drainage; choose 58800 for the vaginal approach and 58805 for the abdominal approach.
- 58820Ovarian abscess drainage
- 58820 describes open drainage of an ovarian abscess, not drainage of an ovarian cyst.
- 58822Abscess drainage
- 58822 describes percutaneous drainage of an ovarian abscess; 58800 is for ovarian cyst drainage through a vaginal approach.
- 58925Ovarian cystectomy
- 58925 is ovarian cystectomy, which removes the cyst; 58800 drains the cyst through a vaginal approach.
58800 billing questions
When should 58800 be chosen over 58805?
Use 58800 for drainage through a vaginal approach. Code 58805 describes ovarian cyst drainage through an abdominal approach.
Does bilateral drainage require modifier 50?
No. The code is already priced as bilateral, and modifier 50 does not increase payment.
Is postoperative care separately reported during the global period?
Related postoperative care for 90 days is included, along with the day-before preoperative visit.
Can an assistant surgeon or co-surgeon be reported?
Medicare does not pay an assistant at surgery for this code. Co-surgeons and team surgery are not permitted.
Is drainage of an ovarian abscess reported with 58800?
No. This code is for ovarian cyst drainage; ovarian abscess drainage is described by codes such as 58820 or 58822, depending on the approach.
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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