Billing code 33735: Heart chamber revisionMedicare rate & RVUs in Ohio
Reports revision of an atrial or ventricular chamber for congenital heart disease when the operation is performed without cardiopulmonary bypass.
CMS doesn’t publish an office rate for 33735 in Ohio.
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 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.
33735 in Ohio
| Payment locality | Office | Facility |
|---|---|---|
| Ohio | Unavailable | $1,215.23 |
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
Swap in your local Medicare rate.
Work 21.65Practice expense 10.12Malpractice 5.45
All indexes start 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
| 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) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| 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) | 0.09/0.84/0.07 | Share 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.
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%).
33735 compared with similar codes
Compare codes
33735 vs 33736 vs 33710 vs 33720: national Medicare rates
Swap in your local Medicare rate.
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.
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
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