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Billing code 58820: Ovarian abscess drainageMedicare rate & RVUs

Open surgical drainage of an ovarian abscess is reported when a gynecologic surgeon evacuates the abscess through direct operative access.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $303.61 for 58820 nationally in a facility.

Medicare rate · 58820

Ovarian abscess drainage

Swap in your local Medicare rate.

Work RVUs
4.58
Total RVUs
9.09
Global days
090

National rate · 2026

$303.61

Facility setting, before claim adjustments.

See every locality for 58820 → · 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 58820 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 58820 covers

A gynecologic surgeon uses open operative access to reach and drain an ovarian abscess, evacuating the infected collection. The procedure is typically performed in an operating room when direct surgical access is used rather than a percutaneous drainage route. Operative findings should support treatment of an abscess, not simply drainage of an ovarian cyst.

Report the service when the operative record documents the abscess, open approach, side or sides treated, and drainage performed. The 90-day global period includes 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 the others at 50%. Bilateral reporting with modifier 50 is paid at 150%. An assistant at surgery may be paid; 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.

Where 58820 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

58820 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$276.42
Alaska*Unavailable$375.99
ArizonaUnavailable$295.89
ArkansasUnavailable$273.07
AtlantaUnavailable$311.49
AustinUnavailable$308.00
BakersfieldUnavailable$307.81
Baltimore/Surr. CntysUnavailable$321.50
BeaumontUnavailable$290.57
BrazoriaUnavailable$297.77

58820 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

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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
58820 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 58820 rate is calculated

Each of 58820’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 · 58820

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 4.58Practice expense 3.70Malpractice 0.81

9.0900 adjusted RVUs×$33.4009 conversion factor=$303.61

All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.

Payment rules and modifiers for 58820

58820 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 58820

Ovarian abscess drainage

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)1Bilateral with modifier 50 pays 150% of the fee schedule amount.
Assistant at surgery (80/81/82/AS)2Paid.
Co-surgeons (62)0Not permitted.
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 · 58820

Ovarian abscess 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.

  • 24 Unrelated E/M visit by the same physician
  • 79 Unrelated procedure (starts its own global period)
  • 58 Staged, more extensive, or therapy procedure that was planned
  • 78 Unplanned 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 50 · payment effect

With and without the modifier

58820 without 50 · national facility

$303.61

Ovarian abscess drainage

58820-50 · Bilateral: 150%

$455.42

Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).

When to use modifier 50

58820 compared with similar codes

Compare codes

58820 vs 58822 vs 58800 vs 58805: national Medicare rates

Swap in your local Medicare rate.

  • 58820
    Ovarian abscess drainage · 4.58 wRVU
    —
  • 58822
    Abscess drainage · 11.51 wRVU
    —
  • 58800
    Ovarian cyst drainage · 4.5 wRVU
    $353.38
  • 58805
    Cyst drainage · 6.26 wRVU
    —

How to choose

58822Abscess drainage
Both codes address an ovarian abscess, but 58820 is for open drainage and 58822 is for percutaneous drainage.
58800Ovarian cyst drainage
Use 58800 for ovarian cyst drainage by vaginal approach. An abscess treated by open operative drainage is reported with 58820.
58805Cyst drainage
Use 58805 for ovarian cyst drainage by abdominal approach. The diagnosis and treatment of an ovarian abscess distinguish 58820.

Codes related to 58820

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

Codes related to 58820
CodeHow it relatesNational office range
Used instead
58822Abscess drainagePercutaneous drainage of an ovarian abscess rather than open operative drainage.No office rate
58800Ovarian cyst drainageOvarian cyst drainage by vaginal approach; use for a cyst, not an abscess.$315.67–$435.77
58805Cyst drainageOvarian cyst drainage by abdominal approach; use for a cyst, not an abscess.No office rate

58820 billing questions

How is this code distinguished from 58822?

Use 58820 for open operative drainage of an ovarian abscess. Code 58822 describes percutaneous drainage of an ovarian abscess.

Can this code be used for drainage of an ovarian cyst?

No. This code is for an ovarian abscess; 58800 or 58805 may apply to ovarian cyst drainage, depending on the approach.

What documentation supports reporting this code?

The operative report should establish that the treated collection was an ovarian abscess and describe the open approach, the side or sides, and the drainage performed.

How is bilateral drainage reported?

When the procedure is bilateral, report modifier 50. CMS pays the bilateral procedure at 150%.

What postoperative care is included?

The 90-day global includes the day-before preoperative visit and related postoperative care through the 90-day period.

Can an assistant or co-surgeon be reported?

An assistant at surgery may be paid. Co-surgeons and team surgery are not permitted for this code.

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 58820PPRRVU2026_Oct_nonQPP.csv, line 6,604 (RVU26D)

Open CMS sourceHow we calculate rates

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