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Billing code 58346: Uterine brachytherapyMedicare rate & RVUs

Reports placement of Heyman capsules through the cervix into the uterine cavity to position applicators for intracavitary radiation treatment.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $419.85 for 58346 nationally in a facility.

Medicare rate · 58346

Uterine brachytherapy

Swap in your local Medicare rate.

Work RVUs
7.37
Total RVUs
12.57
Global days
090

National rate · 2026

$419.85

Facility setting, before claim adjustments.

See every locality for 58346 → · 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 58346 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 58346 covers

A physician places Heyman capsules through the cervix into the uterine cavity to support intracavitary brachytherapy, commonly in treatment of cervical cancer. The capsules serve as applicators for positioning radiation sources; this code describes their insertion, not the radiation delivery itself. The service may be performed by a gynecologist or radiation oncologist in a setting equipped for the planned treatment.

Report 58346 when the documented procedure uses Heyman capsules, rather than a different uterine or vaginal applicator. The operative record should identify the applicator and document its placement. CMS classifies the service as major surgery: the day-before preoperative visit and 90 days of related postoperative care are included. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment is restricted, and 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 58346 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

58346 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$392.15
Alaska*Unavailable$544.26
ArizonaUnavailable$412.28
ArkansasUnavailable$388.70
AtlantaUnavailable$426.95
AustinUnavailable$427.08
BakersfieldUnavailable$431.77
Baltimore/Surr. CntysUnavailable$439.64
BeaumontUnavailable$404.59
BrazoriaUnavailable$416.17

58346 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
58346 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 58346 rate is calculated

Each of 58346’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 · 58346

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 7.37Practice expense 4.62Malpractice 0.58

12.5700 adjusted RVUs×$33.4009 conversion factor=$419.85

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

Payment rules and modifiers for 58346

58346 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 58346

Uterine brachytherapy

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)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)1Not paid (statutory restriction).
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 · 58346

Uterine brachytherapy

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 51 · payment effect

With and without the modifier

58346 without 51 · national facility

$419.85

Uterine brachytherapy

58346-51 · Second procedure: 50%

$209.93

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

58346 compared with similar codes

Compare codes

58346 vs 57155 vs 55920 vs 58300: national Medicare rates

Swap in your local Medicare rate.

  • 58346
    Uterine brachytherapy · 7.37 wRVU
    —
  • 57155
    Brachytherapy applicator · 5.02 wRVU
    $397.47
  • 55920
    Needle placement · 8.1 wRVU
    —
  • 58300
    · 0.98 wRVU
    —

How to choose

57155Brachytherapy applicator
Choose 58346 for Heyman capsules; 57155 describes placement of a uterine tandem and/or vaginal ovoids.
55920Needle placement
Use 55920 for placement of needles or catheters for interstitial radiation, not intracavitary Heyman capsule placement.
58300Insert intrauterine device
58300 is insertion of an intrauterine contraceptive device. It does not describe placement of a brachytherapy applicator.

Codes related to 58346

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

Codes related to 58346
CodeHow it relatesNational office range
Used instead
57155Brachytherapy applicatorUterine tandem and/or vaginal ovoid placement is a different applicator approach for brachytherapy.$359.78–$503.57
55920Needle placementUsed for placement of needles or catheters for interstitial radioelement application rather than Heyman capsules.No office rate
Often billed with
77761Intracavitary brachytherapyIntracavitary radiation source application may be reported for the treatment delivered through the applicator.$379.40–$563.14

58346 billing questions

How does 58346 differ from 57155?

58346 is for Heyman capsule placement. Use 57155 when the physician places a uterine tandem and/or vaginal ovoid applicator instead.

Does 58346 include the radiation treatment?

The code describes placement of the Heyman capsules, not delivery of radiation. Intracavitary radiation source application, when performed and separately documented, is a distinct service.

What documentation supports reporting 58346?

The procedure note should identify Heyman capsules as the applicator and describe their placement in the uterine cavity.

Can modifier 50 be appended?

No. CMS identifies bilateral adjustment as inappropriate for this descriptor and anatomy.

Can an assistant or co-surgeon be paid for this procedure?

CMS applies a statutory restriction to assistant-at-surgery payment. Co-surgeons and team surgery are not permitted.

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 58346PPRRVU2026_Oct_nonQPP.csv, line 6,547 (RVU26D)

Open CMS sourceHow we calculate rates

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