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Billing code 93583: Septal reductionMedicare rate & RVUs

Reports catheter-directed septal reduction, typically alcohol ablation for obstructive hypertrophic cardiomyopathy, performed in a cardiac catheterization setting.

CMS RVU26DEffective Oct 1, 2026109 payment localities359 Medicare services in 2024

Medicare pays $640.96 for 93583 nationally in a facility.

Medicare rate · 93583

Septal reduction

Swap in your local Medicare rate.

Work RVUs
13.41
Total RVUs
19.19
Global days
000

National rate · 2026

$640.96

Facility setting, before claim adjustments.

See every locality for 93583 → · 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 93583 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 93583 covers

An interventional cardiologist uses a catheter to deliver alcohol into a selected septal coronary branch, creating a controlled injury in the thickened heart muscle to reduce obstruction to blood flow. The procedure is typically performed in a hospital catheterization laboratory for a patient with obstructive hypertrophic cardiomyopathy. Temporary pacemaker insertion and selective coronary angiography, when performed as part of the treatment, are included in this service.

Report the code for the transcatheter septal-reduction treatment, not for closure of a congenital septal defect. The procedure report should support the indication, target branch, and treatment performed. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Assistant-at-surgery payment requires documented medical necessity; co-surgeon and team-surgery payment 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 93583 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

93583 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$583.80
Alaska*Unavailable$822.53
ArizonaUnavailable$622.90
ArkansasUnavailable$576.97
AtlantaUnavailable$665.17
AustinUnavailable$634.67
BakersfieldUnavailable$615.96
Baltimore/Surr. CntysUnavailable$679.75
BeaumontUnavailable$625.62
BrazoriaUnavailable$620.26

93583 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
93583 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 93583 rate is calculated

Each of 93583’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 · 93583

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 13.41Practice expense 2.58Malpractice 3.20

19.1900 adjusted RVUs×$33.4009 conversion factor=$640.96

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

Payment rules and modifiers for 93583

The CMS indicators that decide how 93583 is paid alongside other services.

CMS payment indicators · 93583

Septal reduction

RuleCMS valueWhat it means
Global period000Same-day global: pre- and post-op care on the day of the procedure is 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)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.

What modifiers do to the payment

Modifier 51 · payment effect

With and without the modifier

93583 without 51 · national facility

$640.96

Septal reduction

93583-51 · Second procedure: 50%

$320.48

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

93583 compared with similar codes

Compare codes

93583 vs 93580 vs 93581 vs 33416: national Medicare rates

Swap in your local Medicare rate.

  • 93583
    Septal reduction · 13.41 wRVU
    —
  • 93580
    ASD closure · 17.52 wRVU
    —
  • 93581
    VSD closure · 23.78 wRVU
    —
  • 33416
    Septal myectomy · 35.65 wRVU
    —

How to choose

93580ASD closure
93580 is used for transcatheter closure of an atrial septal defect; 93583 reduces hypertrophied septal heart muscle.
93581VSD closure
93581 addresses transcatheter closure of a ventricular septal defect, not catheter-directed treatment of obstructive myocardial thickening.
33416Septal myectomy
33416 describes surgical septal myectomy. Choose it for the surgical approach rather than catheter-directed septal reduction reported with 93583.

Codes related to 93583

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

Codes related to 93583
CodeHow it relatesNational office range
Used instead
33416Septal myectomySurgical septal myectomy is an alternative septal-reduction approach for selected patients.No office rate

93583 billing questions

When should 93583 be selected instead of a septal defect closure code?

Use 93583 for catheter-directed reduction of hypertrophied heart muscle, typically in obstructive hypertrophic cardiomyopathy. Codes such as 93580 and 93581 describe closure of an atrial or ventricular septal defect.

Can selective coronary angiography be reported separately?

Selective coronary angiography performed as part of the septal-reduction treatment is included in 93583. The code also includes temporary pacemaker insertion when performed.

What supports reporting 93583?

The record should identify the clinical indication and document the catheter-based septal-reduction treatment, including the target branch and intervention performed.

How does the 0-day global period affect same-day care?

Same-day preoperative and postoperative care is included in the procedure's payment. The 0-day global period does not extend routine global care beyond the procedure date.

How are other procedures in the same session paid?

CMS pays the highest-valued procedure in full and applies the standard multiple-procedure reduction to other procedures performed in that session.

Can an assistant or co-surgeon be reported?

Assistant-at-surgery payment requires documentation of medical necessity. CMS does not permit co-surgeon or team-surgery payment for this service.

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 93583PPRRVU2026_Oct_nonQPP.csv, line 12,152 (RVU26D)

Open CMS sourceHow we calculate rates

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