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CPT code 93566: Chamber angiography, right atrium or ventricle2026 Medicare rate & RVUs in King County, WA

Reports selective angiography of the right atrium or right ventricle performed during cardiac catheterization, with imaging supervision, interpretation, and reporting.

CMS RVU26DEffective Oct 1, 2026One payment locality166 Medicare services in 2024

In King County, WA, Medicare pays $27.15 for 93566 in the office and $23.47 when it’s performed in a hospital or facility.

$27.15Office (non-facility)
$23.47Hospital or facility
+7.0%vs the national office rate ($25.38)

Check a contract rate as a % of Medicare · 93566 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 93566 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in King County, WA
  2. What 93566 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 93566 covers

This add-on describes selective contrast imaging of the right atrium or right ventricle during cardiac catheterization. A cardiologist or other physician performing the catheterization may use it to evaluate right-sided chamber anatomy, such as when assessing a congenital or structural abnormality. The code covers the injection and its imaging supervision, interpretation, and report; routine catheter placement and pressure measurements alone do not describe this angiographic service.

Report 93566 only with an eligible primary cardiac catheterization procedure, not as a standalone service. The record should identify the selectively imaged chamber and support that a contrast injection and angiographic study were performed, with the findings documented. CMS treats this add-on as paid within the primary procedure's global period. The imaging supervision, interpretation, and report are part of this injection service.

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 King County, WA compares for 93566

Across 109 of 109 payment localities, the office rate for 93566 runs from $23.19 in Arkansas to $32.78 in Alaska. King County, WA pays $27.15. The RVUs are the same everywhere; the geographic indexes change the dollars.

93566 in King County, WA vs other payment areas
  1. King County, WA · this page$27.15
  2. Rest of Washington · Washington$25.30−$1.85
  3. Los Angeles, CA · California$26.32−$0.83
  4. Washington, DC area · District of Columbia$27.70+$0.55
  5. Miami, FL · Florida$29.73+$2.58
  6. Chicago, IL · Illinois$28.99+$1.84
  7. Manhattan, NY · New York$29.03+$1.88

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

Every other payment area

93566 in every other Medicare payment locality
Payment localityOfficeFacility
AlaskaAlaska$32.78$29.58
AlabamaAlabama$23.43$20.80
ArkansasArkansas$23.19$20.61
ArizonaArizona$24.80$21.89
Bakersfield, CACalifornia$25.26$21.97
Chico, CACalifornia$25.03$21.74
El Centro, CACalifornia$25.05$21.75
Fresno, CACalifornia$25.03$21.74

93566 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.

$23.19

$32.78

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

View every state and territory as a table
93566 office rate range by state
State / territoryOffice rate rangeLocalities
AK$32.781
AL$23.431
AR$23.191
AZ$24.801
CA$25.03–$28.7529
CO$25.401
CT$26.761
DC$27.701
DE$25.121
FL$26.45–$29.733
GA$25.21–$26.072
GU$25.131
HI$25.131
IA$23.231
ID$23.471
IL$26.34–$28.994
IN$23.551
KS$23.451
KY$24.451
LA$24.54–$25.372
MA$25.44–$26.992
MD$25.41–$27.703
ME$23.87–$24.342
MI$25.18–$27.002
MN$23.691
MO$24.44–$25.093
MS$23.811
MT$25.381
NC$23.991
ND$23.801
NE$23.231
NH$25.311
NJ$26.88–$27.612
NM$25.401
NV$24.941
NY$24.27–$29.925
OH$24.851
OK$24.111
OR$24.57–$25.672
PA$24.72–$26.462
PR$25.411
RI$25.621
SC$24.501
SD$23.611
TN$23.571
TX$24.62–$26.488
UT$24.731
VA$24.49–$27.702
VI$25.411
VT$24.001
WA$25.30–$27.152
WI$23.271
WV$25.701
WY$24.691

See 93566 in every payment locality

How the 93566 rate is calculated

Each of 93566’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 · 93566

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.49

0.49 RVUs× 1.000 GPCI

Practice expense0.19

0.19 RVUs× 1.000 GPCI

Malpractice0.08

0.08 RVUs× 1.000 GPCI

Adjusted RVUs

0.7600

Conversion factor

$33.4009

Medicare rate

$25.38

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

The exact King County, WA inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

12,136

Code
93566
Physician work
0.49
Practice expense
0.19
Malpractice
0.08

GPCI2026.csv

108

Locality
King County, WA
Physician work
1.050
Practice expense
1.227
Malpractice
0.817
Office calculation for 93566 in King County, WA
ComponentRVULocality factorAdjusted
Physician work0.49× 1.0500.5145
Practice expense0.19× 1.2270.2331
Malpractice0.08× 0.8170.0654
Total RVUs0.8130
Conversion factor× 33.4009

Office rate, King County, WA$27.15

Office: (0.49 × 1.05 + 0.19 × 1.227 + 0.08 × 0.817) × $33.4009 = $27.15

Facility: (0.49 × 1.05 + 0.1 × 1.227 + 0.08 × 0.817) × $33.4009 = $23.47

Open 93566 in the RVU calculator

Payment rules and modifiers for 93566

The CMS indicators that decide how 93566 is paid alongside other services.

CMS payment indicators · 93566

Chamber angiography, right atrium or ventricle

RuleCMS valueWhat it means
Global periodZZZAdd-on code: falls within the primary procedure’s global period.
Multiple procedures0No multiple-procedure reduction.
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.

Codes related to 93566

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

Codes related to 93566
CodeHow it relatesOffice range, King County, WA
Add-on codes
93451Right heart cath, hemodynamic measurementsRight heart catheterization that may serve as the primary procedure for this add-on.$1,024.65
Same family
93565Cardiac angiography, left ventricle or atriumRelated catheterization injection code for left ventricular or left atrial angiography.$27.84
93567Aortic angiography, supravalvular injectionRelated catheterization injection code for supravalvular aortography.$38.87
93568Pulmonary angiography, nonselective injectionRelated catheterization injection code for nonselective pulmonary artery angiography.$48.60
93563Coronary angiography, during congenital catheterizationRelated catheterization injection code for selective coronary angiography.$53.90

How 93566 has changed in King County, WA

93566 · Office / nonfacility

$27.15

Effective 2026-10-01

The base rate is $0.97 higher than on 2025-10-01, moving from $26.18 to $27.15 (3.7%).

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

    $26.18changed to$27.15

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.50 changed to 0.49
    • Practice expense RVU 0.18 changed to 0.19
    • Work GPCI 1.043 changed to 1.050
    • Practice expense GPCI 1.220 changed to 1.227
    • Malpractice GPCI 0.853 changed to 0.817

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $26.82changed to$26.18

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 0.17 changed to 0.18
    • Malpractice RVU 0.09 changed to 0.08

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $26.38changed to$26.82

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $27.73changed to$26.38

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 0.18 changed to 0.17
    • Malpractice RVU 0.10 changed to 0.09
    • Work GPCI 1.039 changed to 1.043
    • Practice expense GPCI 1.207 changed to 1.220
    • Malpractice GPCI 0.815 changed to 0.853

  5. January 1, 2023

    RVU23A

    $153.43changed to$27.73

    • Conversion factor 34.6062 changed to 33.8872
    • Work RVU 0.86 changed to 0.50
    • Practice expense RVU 2.85 changed to 0.18
    • Malpractice RVU 0.18 changed to 0.10
    • Work GPCI 1.036 changed to 1.039
    • Practice expense GPCI 1.194 changed to 1.207
    • Malpractice GPCI 0.776 changed to 0.815

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $166.24changed to$153.43

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 3.14 changed to 2.85
    • Malpractice RVU 0.16 changed to 0.18

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $170.13changed to$166.24

    • Conversion factor 36.0896 changed to 34.8931
    • Malpractice RVU 0.18 changed to 0.16
    • Work GPCI 1.031 changed to 1.036
    • Practice expense GPCI 1.170 changed to 1.194
    • Malpractice GPCI 0.854 changed to 0.776

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $175.74changed to$170.13

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 3.33 changed to 3.14
    • Malpractice RVU 0.19 changed to 0.18
    • Work GPCI 1.027 changed to 1.031
    • Practice expense GPCI 1.146 changed to 1.170
    • Malpractice GPCI 0.931 changed to 0.854

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $185.45changed to$175.74

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 3.57 changed to 3.33

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $182.35changed to$185.45

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 3.53 changed to 3.57
    • Work GPCI 1.026 changed to 1.027
    • Practice expense GPCI 1.151 changed to 1.146
    • Malpractice GPCI 0.713 changed to 0.931

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $192.49changed to$182.35

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 3.81 changed to 3.53
    • Work GPCI 1.025 changed to 1.026
    • Practice expense GPCI 1.155 changed to 1.151
    • Malpractice GPCI 0.495 changed to 0.713

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $192.77changed to$192.49

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 3.80 changed to 3.81

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $191.81changed to$192.77

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $193.39changed to$191.81

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 3.88 changed to 3.80
    • Malpractice RVU 0.08 changed to 0.19
    • Practice expense GPCI 1.150 changed to 1.155
    • Malpractice GPCI 0.688 changed to 0.495

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $198.20changed to$193.39

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 4.26 changed to 3.88
    • Practice expense GPCI 1.144 changed to 1.150
    • Malpractice GPCI 0.881 changed to 0.688

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $198.20

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$27.15$23.47RVU26D
2026-07-01$27.15$23.47RVU26C
2026-04-01$27.15$23.47RVU26B
2026-01-01$27.15$23.47RVU26A
2025-10-01$26.18$26.18RVU25D
2025-07-01$26.18$26.18RVU25C
2025-04-01$26.18$26.18RVU25B
2025-01-01$26.18$26.18RVU25A
2024-10-01$26.82$26.82RVU24D
2024-07-01$26.82$26.82RVU24C
2024-04-01$26.82$26.82RVU24B
2024-03-09$26.82$26.82RVU24AR
2024-01-01$26.38$26.38RVU24A
2023-10-01$27.73$27.73RVU23D
2023-07-01$27.73$27.73RVU23C
2023-04-01$27.73$27.73RVU23B
2023-01-01$27.73$27.73RVU23A
2022-10-01$153.43$48.48RVU22D
2022-07-01$153.43$48.48RVU22C
2022-04-01$153.43$48.48RVU22B
2022-01-01$153.43$48.48RVU22A
2021-10-01$166.24$47.92RVU21D
2021-07-01$166.24$47.92RVU21C
2021-04-01$166.24$47.92RVU21B
2021-01-01$166.24$47.92RVU21A
2020-10-01$170.13$50.21RVU20D
2020-07-01$170.13$50.21RVU20C
2020-04-01$170.13$50.21RVU20B
2020-01-01$170.13$50.21RVU20A
2019-10-01$175.74$50.60RVU19D
2019-07-01$175.74$50.60RVU19C
2019-04-01$175.74$50.60RVU19B
2019-01-01$175.74$50.60RVU19A
2018-10-01$185.45$50.54RVU18D
2018-07-01$185.45$50.54RVU18C
2018-04-01$185.45$50.54RVU18B
2018-01-01$185.45$50.54RVU18AR1
2017-10-01$182.35$48.92RVU17D
2017-07-01$182.35$48.92RVU17C
2017-04-01$182.35$48.92RVU17B
2017-01-01$182.35$48.92RVU17A
2016-10-01$192.49$46.92RVU16D
2016-07-01$192.49$46.92RVU16C
2016-04-01$192.49$46.92RVU16B
2016-01-01$192.49$46.92RVU16A
2015-10-01$192.77$47.09RVU15D
2015-07-01$192.77$47.09RVU15C
2015-04-01$191.81$46.86RVU15B
2015-01-01$191.81$46.86RVU15A
2014-10-01$193.39$45.91RVU14D
2014-07-01$193.39$45.91RVU14C
2014-04-01$193.39$45.91RVU14B
2014-01-01$193.39$45.91RVU14A
2013-10-01$198.20$44.46RVU13D
2013-07-01$198.20$44.46RVU13C
2013-04-01$198.20$44.46RVU13B
2013-01-01$198.20$44.46RVU13AR

Price 93566 for an earlier date of service

Where the King County, WA rate applies

King County, WA is a Medicare payment area, not a city. Our Census mapping connects it to 63 cities and communities in Washington. Some span more than one payment area; confirm with the service ZIP.

  • Seattle
  • Algona
  • Ames Lake
  • 93566 in Auburn · multiple payment areas
  • Baring
  • Beaux Arts Village
  • Bellevue
  • Black Diamond

Browse all communities in Washington

93566 billing questions

Can 93566 be reported by itself?

No. It is an add-on code and must be reported with an eligible primary cardiac catheterization procedure.

How is 93566 different from 93565?

93566 reports selective imaging of the right atrium or right ventricle. 93565 is for left ventricular or left atrial angiography.

Does a right heart catheterization with pressure measurements support 93566?

Pressure measurements alone do not describe selective right-sided chamber angiography. The record should support a contrast injection and angiographic imaging of the right atrium or ventricle.

Is the angiographic interpretation separately reported?

The code includes imaging supervision, interpretation, and reporting for the injection study.

What should the procedure note identify?

Document which right-sided chamber was selectively imaged, the injection and angiographic study, and the resulting findings.

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 93566PPRRVU2026_Oct_nonQPP.csv, line 12,136 (RVU26D)
Geographic factors for King County, WAGPCI2026.csv, line 108 (RVU26D)

Open CMS sourceHow we calculate rates

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