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CPT code 33735: Heart chamber revision2026 Medicare rate & RVUs

Reports revision of an atrial or ventricular chamber for congenital heart disease when the operation is performed without cardiopulmonary bypass.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $1,243.18 for 33735 nationally in a facility.

Medicare rate · 33735

Heart chamber revision

Work RVUs
21.65
Total RVUs
37.22
Global days
090

National rate · 2026

$1,243.18

Facility setting, before claim adjustments.

See every locality for 33735 →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 33735 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 33735 covers

This code represents surgical revision of an atrial or ventricular heart chamber for congenital heart disease, with or without use of a patch, when cardiopulmonary bypass is not used. A congenital cardiac surgeon typically performs the operation in a hospital operating room. The operative report should identify the chamber revised and describe the corrective work, including patch use when applicable.

Choose this code when the documented operation is a chamber revision and does not use cardiopulmonary bypass; use the related sibling code when bypass is used. The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care. 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% reduction. Modifier 50 is inappropriate for this chamber procedure. 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 33735 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

33735 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,121.93
Alaska*Unavailable$1,544.98
ArizonaUnavailable$1,206.49
ArkansasUnavailable$1,107.23
AtlantaUnavailable$1,287.35
AustinUnavailable$1,243.48
BakersfieldUnavailable$1,218.19
Baltimore/Surr. CntysUnavailable$1,322.57
BeaumontUnavailable$1,199.84
BrazoriaUnavailable$1,205.88

33735 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
33735 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 33735 rate is calculated

Each of 33735’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 · 33735

RVUs × geographic indexes × conversion factor

Work21.65

21.65 RVUs× 1.000 GPCI

Practice expense10.12

10.12 RVUs× 1.000 GPCI

Malpractice5.45

5.45 RVUs× 1.000 GPCI

Adjusted RVUs

37.2200

Conversion factor

$33.4009

Medicare rate

$1,243.18

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

Payment rules and modifiers for 33735

33735 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 33735

Heart chamber revision

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)2Paid.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.09/0.84/0.07Share of the payment for pre-op, the procedure itself, and post-op care.

Global surgery period · 33735

Heart chamber revision

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

33735 without 51 · national facility

$1,243.18

Heart chamber revision

33735-51 · Second procedure: 50%

$621.59

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

33735 compared with similar codes

Compare codes · National

4 codes, side by side

  • 33735

    Heart chamber revision21.65 wRVU

    Not priced

  • 33736

    Heart chamber revision23.71 wRVU

    Not priced

  • 33710

    Heart defect repair36.56 wRVU

    Not priced

  • 33720

    Heart defect repair26.58 wRVU

    Not priced

How to choose

33736Heart chamber revision
Both codes describe congenital heart chamber revision. The operative method separates them: 33735 is for surgery without cardiopulmonary bypass, while 33736 is for surgery with bypass.
33710Heart defect repair
33710 identifies repair of a secundum atrial septal defect. Use 33735 when the documented service is revision of an atrial or ventricular chamber instead.
33720Heart defect repair
33720 identifies repair of a primum atrial septal defect. It is distinct from a documented revision of an atrial or ventricular chamber under 33735.

Codes related to 33735

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

Codes related to 33735
CodeHow it relatesNational office range
Same family
33736Heart chamber revisionSibling chamber-revision code for operations performed with cardiopulmonary bypass.No office rate
Used instead
33710Heart defect repairUsed for repair of a secundum atrial septal defect rather than a chamber revision.No office rate
33720Heart defect repairUsed for repair of a primum atrial septal defect rather than a chamber revision.No office rate

33735 billing questions

How is this code distinguished from 33736?

The cardiopulmonary bypass method distinguishes the two chamber-revision codes. Report 33735 when bypass is not used and 33736 when it is used.

What documentation supports reporting 33735?

The operative report should identify the atrial or ventricular chamber revised, describe the revision and any patch work, and establish that cardiopulmonary bypass was not used.

Can modifier 50 be used?

No. CMS identifies bilateral adjustment as inappropriate for this code because of the procedure and anatomy.

Can an assistant or co-surgeon be reported?

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

What does the 90-day global period include?

It includes the day-before preoperative visit and 90 days of related postoperative care.

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 33735PPRRVU2026_Oct_nonQPP.csv, line 4,046 (RVU26D)

Open CMS sourceHow we calculate rates

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