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Billing code 35631: Aortic bypassMedicare rate & RVUs

Reports open aortic bypass grafting to the celiac, mesenteric, and renal arteries when all three visceral and renal territories are revascularized.

CMS RVU26DEffective Oct 1, 2026109 payment localities330 Medicare services in 2024

Medicare pays $1,674.05 for 35631 nationally in a facility.

Medicare rate · 35631

Aortic bypass

Swap in your local Medicare rate.

Work RVUs
35.13
Total RVUs
50.12
Global days
090

National rate · 2026

$1,674.05

Facility setting, before claim adjustments.

See every locality for 35631 → · 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 35631 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 35631 covers

A vascular surgeon performs an open bypass from the aorta to the celiac, mesenteric, and renal arteries using graft material other than vein. The operation may be used for complex occlusive disease affecting these arterial territories. It is typically performed in a hospital operating room, with the operative report identifying the aortic inflow, each distal target, and the graft material and configuration used.

Report this code when the documented bypass includes all three named target territories; a bypass from the aorta to only one of them is represented by a different code. The 90-day global period includes the day-before preoperative visit and related postoperative care during the following 90 days. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and the others are reduced to 50%. For a bilateral service reported with modifier 50, payment is 150%. Assistant-at-surgery payment may be made; co-surgeon payment requires supporting documentation. Team surgery is 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 35631 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

35631 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,519.30
Alaska*Unavailable$2,139.97
ArizonaUnavailable$1,624.83
ArkansasUnavailable$1,500.85
AtlantaUnavailable$1,740.76
AustinUnavailable$1,654.14
BakersfieldUnavailable$1,599.15
Baltimore/Surr. CntysUnavailable$1,778.29
BeaumontUnavailable$1,634.66
BrazoriaUnavailable$1,616.00

35631 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

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
35631 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 35631 rate is calculated

Each of 35631’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 · 35631

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 35.13Practice expense 6.06Malpractice 8.93

50.1200 adjusted RVUs×$33.4009 conversion factor=$1,674.05

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

Payment rules and modifiers for 35631

35631 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 35631

Aortic bypass

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)1Permitted with supporting documentation.
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 · 35631

Aortic bypass

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

35631 without 50 · national facility

$1,674.05

Aortic bypass

35631-50 · Bilateral: 150%

$2,511.08

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

35631 compared with similar codes

Compare codes

35631 vs 35632 vs 35633 vs 35634 vs 35636: national Medicare rates

Swap in your local Medicare rate.

  • 35631
    Aortic bypass · 35.13 wRVU
    —
  • 35632
    Arterial bypass · 35.23 wRVU
    —
  • 35633
    Arterial bypass · 38.13 wRVU
    —
  • 35634
    Arterial bypass · 34.45 wRVU
    —
  • 35636
    Arterial bypass · 30.96 wRVU
    —

How to choose

35632Arterial bypass
35632 describes an iliac-to-celiac bypass. This code uses aortic inflow and includes celiac, mesenteric, and renal targets.
35633Arterial bypass
35633 describes an iliac-to-mesenteric bypass. This code describes aortic inflow to the celiac, mesenteric, and renal arteries.
35634Arterial bypass
35634 describes an iliac-to-renal bypass. This code covers aortic bypass to three arterial territories, including the renal arteries.
35636Arterial bypass
35636 is a splenorenal bypass, using a different inflow route for renal revascularization; this code uses the aorta and includes celiac and mesenteric targets as well.

Codes related to 35631

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

Codes related to 35631
CodeHow it relatesNational office range
Same family
35632Arterial bypassRelated visceral bypass code using iliac rather than aortic inflow for the celiac target.No office rate
35633Arterial bypassRelated visceral bypass code using iliac rather than aortic inflow for the mesenteric target.No office rate
35634Arterial bypassRelated renal bypass code using iliac rather than aortic inflow.No office rate
Used instead
35636Arterial bypassSplenorenal bypass is a different route for renal revascularization.No office rate

35631 billing questions

When should this code be selected instead of an aortic bypass to one artery?

Use it when the operation documents bypass from the aorta to the celiac, mesenteric, and renal arteries. A bypass to only one of those targets is not this full three-territory service.

What operative details support reporting this code?

The operative report should identify the aorta as the inflow and document each of the three distal arterial target territories, along with the graft material and configuration.

Does the code represent the bypass to all three target territories?

Yes. The code represents the aortic bypass service involving the celiac, mesenteric, and renal arteries; the report should substantiate all three targets.

How is this code paid when other procedures are performed in the same session?

Under the standard multiple procedure reduction, the highest-valued procedure is paid in full and the other procedures are paid at 50%.

Can assistant or co-surgeon services be reported?

Assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation, and team surgery is 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 35631PPRRVU2026_Oct_nonQPP.csv, line 4,379 (RVU26D)

Open CMS sourceHow we calculate rates

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