CPT code 93456: Cardiac catheterization, right heart and coronary study2026 Medicare rate & RVUs in Montana

Reports right-sided intracardiac hemodynamic assessment combined with coronary artery imaging during a diagnostic catheterization, without left heart catheterization.

CMS RVU26DEffective Oct 1, 2026One payment locality20.1K Medicare services in 2024

In Montana, Medicare pays $1,093.47 for 93456 in the office.

$1,093.47Office (non-facility)
Not available in this settingHospital or facility
−0.0%vs the national office rate ($1,093.55)

Check a contract rate as a % of Medicare · 93456 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

We’ll open 93456 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Montana
  2. What 93456 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What 93456 covers

A cardiologist typically performs this diagnostic study in a cardiac catheterization laboratory. Catheters are used to measure pressures and hemodynamics in the right heart and pulmonary circulation, while contrast imaging evaluates the coronary arteries. It may be selected when the clinical evaluation needs both right-sided hemodynamic information and anatomic assessment of coronary disease. The service does not include left heart catheterization or bypass graft angiography.

Report 93456 when both the right heart catheterization and coronary angiography are performed; documentation should support the clinical need, right-sided measurements, and coronary imaging and findings. The code has a 0-day global period, so same-day preoperative and postoperative care is included. It may be billed globally or with modifier 26 for interpretation or TC for the technical portion. When other procedures subject to the standard multiple procedure reduction are performed in the same session, the highest-valued procedure is paid in full and the others at 50%. Modifier 50 is inappropriate. Assistant-at-surgery payment requires documented medical necessity; 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.

How Montana compares for 93456

Across 109 of 109 payment localities, the office rate for 93456 runs from $953.11 in Arkansas to $1,478.03 in San Benito County, CA. Montana pays $1,093.47. The RVUs are the same everywhere; the geographic indexes change the dollars.

93456 in Montana vs other payment areas
  1. Montana · this page$1,093.47
  2. Los Angeles, CA · California$1,246.28+$152.81
  3. Washington, DC area · District of Columbia$1,261.86+$168.39
  4. Miami, FL · Florida$1,188.16+$94.69
  5. Chicago, IL · Illinois$1,149.38+$55.91
  6. Manhattan, NY · New York$1,268.31+$174.84
  7. Alaska · Alaska$1,228.25+$134.78

Other areas in Montana first, then benchmark localities. Bars start at $0.

Every other payment area

93456 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$968.89—
ArkansasArkansas$953.11—
ArizonaArizona$1,061.22—
Bakersfield, CACalifornia$1,164.87—
Chico, CACalifornia$1,161.66—
El Centro, CACalifornia$1,161.85—
Fresno, CACalifornia$1,161.66—
Hanford, CACalifornia$1,161.66—

93456 rates by state

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

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.

$953.11

$1,319.85

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
93456 office rate range by state
State / territoryOffice rate rangeLocalities
AK$1,228.251
AL$968.891
AR$953.111
AZ$1,061.221
CA$1,161.66–$1,478.0329
CO$1,142.581
CT$1,171.951
DC$1,261.861
DE$1,080.241
FL$1,075.07–$1,188.163
GA$1,007.81–$1,115.712
GU$1,195.431
HI$1,195.431
IA$996.851
ID$1,004.111
IL$1,040.30–$1,149.384
IN$1,010.651
KS$991.501
KY$994.491
LA$992.70–$1,047.912
MA$1,134.48–$1,264.532
MD$1,102.64–$1,261.863
ME$1,009.88–$1,071.482
MI$1,023.48–$1,089.932
MN$1,091.291
MO$973.48–$1,052.213
MS$963.511
MT$1,093.471
NC$1,021.751
ND$1,070.531
NE$1,003.011
NH$1,124.071
NJ$1,184.36–$1,246.322
NM$1,029.731
NV$1,087.941
NY$1,038.90–$1,302.105
OH$1,018.801
OK$992.591
OR$1,078.59–$1,182.462
PA$1,020.67–$1,139.852
PR$1,102.451
RI$1,121.481
SC$1,022.171
SD$1,067.821
TN$997.101
TX$1,013.15–$1,139.558
UT$1,037.831
VA$1,067.49–$1,261.862
VI$1,102.451
VT$1,065.781
WA$1,132.51–$1,291.902
WI$1,030.501
WV$997.221
WY$1,083.471

See 93456 in every payment locality

How the 93456 rate is calculated

Each of 93456’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 · 93456

RVUs × geographic indexes × conversion factor

Office or facility?

Work5.75

5.75 RVUs× 1.000 GPCI

Practice expense25.83

25.83 RVUs× 1.000 GPCI

Malpractice1.16

1.16 RVUs× 1.000 GPCI

Adjusted RVUs

32.7400

Conversion factor

$33.4009

Medicare rate

$1,093.55

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

The exact Montana inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

12,106

Code
93456
Physician work
5.75
Practice expense
25.83
Malpractice
1.16

GPCI2026.csv

71

Locality
Montana
Physician work
1.000
Practice expense
1.000
Malpractice
0.998
Office calculation for 93456 in Montana
ComponentRVULocality factorAdjusted
Physician work5.75× 1.0005.7500
Practice expense25.83× 1.00025.8300
Malpractice1.16× 0.9981.1577
Total RVUs32.7377
Conversion factor× 33.4009

Office rate, Montana$1093.47

Office: (5.75 × 1 + 25.83 × 1 + 1.16 × 0.998) × $33.4009 = $1093.47

Open 93456 in the RVU calculator

Payment rules and modifiers for 93456

The CMS indicators that decide how 93456 is paid alongside other services.

CMS payment indicators · 93456

Cardiac catheterization, right heart and coronary study

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/technical1Diagnostic test with separate professional (26) and technical (TC) components.

What modifiers do to the payment

Modifier 26 · payment effect

With and without the modifier

93456 without 26 · national office

$1,093.55

Cardiac catheterization, right heart and coronary study

93456-26 · Professional component

$302.95

Pays only the interpretation and report.

When to use modifier 26

How 93456 has changed in Montana

93456 · Office / nonfacility

$1093.47

Effective 2026-10-01

The base rate is $53.70 higher than on 2025-10-01, moving from $1039.77 to $1093.47 (5.2%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release
  1. January 1, 2026

    RVU26A

    $1039.77changed to$1093.47

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 5.90 changed to 5.75
    • Practice expense RVU 25.12 changed to 25.83
    • Malpractice RVU 1.15 changed to 1.16
    • Malpractice GPCI 0.978 changed to 0.998

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $1106.61changed to$1039.77

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 26.19 changed to 25.12
    • Malpractice RVU 1.18 changed to 1.15

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $1088.55changed to$1106.61

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $1142.18changed to$1088.55

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 26.71 changed to 26.19
    • Malpractice RVU 1.12 changed to 1.18
  5. January 1, 2023

    RVU23A

    $1203.73changed to$1142.18

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 27.76 changed to 26.71
    • Malpractice RVU 1.15 changed to 1.12
    • Malpractice GPCI 0.977 changed to 0.978

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $1231.86changed to$1203.73

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 28.29 changed to 27.76
    • Malpractice RVU 1.14 changed to 1.15

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $1198.55changed to$1231.86

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 25.85 changed to 28.29
    • Malpractice RVU 1.12 changed to 1.14
    • Malpractice GPCI 1.304 changed to 0.977

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $1161.44changed to$1198.55

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 24.37 changed to 25.85
    • Malpractice RVU 1.20 changed to 1.12
    • Malpractice GPCI 1.631 changed to 1.304

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $1114.94changed to$1161.44

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 23.13 changed to 24.37
    • Malpractice RVU 1.19 changed to 1.20

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $1094.78changed to$1114.94

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 22.89 changed to 23.13
    • Malpractice RVU 1.20 changed to 1.19
    • Malpractice GPCI 1.429 changed to 1.631

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $1150.37changed to$1094.78

    • Conversion factor 35.8043 changed to 35.8887
    • Work RVU 6.15 changed to 5.90
    • Practice expense RVU 24.41 changed to 22.89
    • Malpractice RVU 1.28 changed to 1.20
    • Malpractice GPCI 1.226 changed to 1.429

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $1153.60changed to$1150.37

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 24.36 changed to 24.41
    • Malpractice RVU 1.30 changed to 1.28

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $1147.86changed to$1153.60

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $1139.74changed to$1147.86

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 24.14 changed to 24.36
    • Malpractice RVU 1.31 changed to 1.30
    • Malpractice GPCI 1.165 changed to 1.226

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $1168.05changed to$1139.74

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 26.67 changed to 24.14
    • Malpractice RVU 1.37 changed to 1.31
    • Malpractice GPCI 1.103 changed to 1.165

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $1168.05

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$1,093.47Not available in this settingRVU26D
2026-07-01$1,093.47Not available in this settingRVU26C
2026-04-01$1,093.47Not available in this settingRVU26B
2026-01-01$1,093.47Not available in this settingRVU26A
2025-10-01$1,039.77Not available in this settingRVU25D
2025-07-01$1,039.77Not available in this settingRVU25C
2025-04-01$1,039.77Not available in this settingRVU25B
2025-01-01$1,039.77Not available in this settingRVU25A
2024-10-01$1,106.61Not available in this settingRVU24D
2024-07-01$1,106.61Not available in this settingRVU24C
2024-04-01$1,106.61Not available in this settingRVU24B
2024-03-09$1,106.61Not available in this settingRVU24AR
2024-01-01$1,088.55Not available in this settingRVU24A
2023-10-01$1,142.18Not available in this settingRVU23D
2023-07-01$1,142.18Not available in this settingRVU23C
2023-04-01$1,142.18Not available in this settingRVU23B
2023-01-01$1,142.18Not available in this settingRVU23A
2022-10-01$1,203.73Not available in this settingRVU22D
2022-07-01$1,203.73Not available in this settingRVU22C
2022-04-01$1,203.73Not available in this settingRVU22B
2022-01-01$1,203.73Not available in this settingRVU22A
2021-10-01$1,231.86Not available in this settingRVU21D
2021-07-01$1,231.86Not available in this settingRVU21C
2021-04-01$1,231.86Not available in this settingRVU21B
2021-01-01$1,231.86Not available in this settingRVU21A
2020-10-01$1,198.55Not available in this settingRVU20D
2020-07-01$1,198.55Not available in this settingRVU20C
2020-04-01$1,198.55Not available in this settingRVU20B
2020-01-01$1,198.55Not available in this settingRVU20A
2019-10-01$1,161.44Not available in this settingRVU19D
2019-07-01$1,161.44Not available in this settingRVU19C
2019-04-01$1,161.44Not available in this settingRVU19B
2019-01-01$1,161.44Not available in this settingRVU19A
2018-10-01$1,114.94Not available in this settingRVU18D
2018-07-01$1,114.94Not available in this settingRVU18C
2018-04-01$1,114.94Not available in this settingRVU18B
2018-01-01$1,114.94Not available in this settingRVU18AR1
2017-10-01$1,094.78Not available in this settingRVU17D
2017-07-01$1,094.78Not available in this settingRVU17C
2017-04-01$1,094.78Not available in this settingRVU17B
2017-01-01$1,094.78Not available in this settingRVU17A
2016-10-01$1,150.37Not available in this settingRVU16D
2016-07-01$1,150.37Not available in this settingRVU16C
2016-04-01$1,150.37Not available in this settingRVU16B
2016-01-01$1,150.37Not available in this settingRVU16A
2015-10-01$1,153.60Not available in this settingRVU15D
2015-07-01$1,153.60Not available in this settingRVU15C
2015-04-01$1,147.86Not available in this settingRVU15B
2015-01-01$1,147.86Not available in this settingRVU15A
2014-10-01$1,139.74Not available in this settingRVU14D
2014-07-01$1,139.74Not available in this settingRVU14C
2014-04-01$1,139.74Not available in this settingRVU14B
2014-01-01$1,139.74Not available in this settingRVU14A
2013-10-01$1,168.05Not available in this settingRVU13D
2013-07-01$1,168.05Not available in this settingRVU13C
2013-04-01$1,168.05Not available in this settingRVU13B
2013-01-01$1,168.05Not available in this settingRVU13AR

Price 93456 for an earlier date of service

Where the Montana rate applies

Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.

  • Absarokee
  • Acton
  • Alberton
  • Alder
  • Alzada
  • Amsterdam
  • Anaconda-Deer Lodge County
  • Antelope

Browse all communities in Montana

93456 billing questions

When should 93456 be chosen over 93451?

Use 93456 when the same diagnostic session includes right heart catheterization and coronary angiography. Use 93451 when the service is right heart catheterization without the coronary imaging.

How does 93456 differ from 93454?

93456 includes right-sided hemodynamic catheterization along with coronary angiography. 93454 describes coronary angiography without the right heart catheterization.

Can right heart catheterization or coronary angiography be billed separately with 93456?

Both services are represented in 93456 when performed as part of the combined study. Do not separately report the component service for the same work.

Can the professional and technical portions be billed separately?

Yes. Modifier 26 identifies the professional interpretation and modifier TC identifies the technical portion; billing without either modifier represents the global service.

Is modifier 50 appropriate, and how are other same-session procedures handled?

Modifier 50 is inappropriate for this code. When another procedure subject to the standard multiple procedure reduction is performed in the same session, the highest-valued procedure is paid in full and the others at 50%.

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 93456PPRRVU2026_Oct_nonQPP.csv, line 12,106 (RVU26D)
Geographic factors for MontanaGPCI2026.csv, line 71 (RVU26D)

Open CMS sourceHow we calculate rates

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