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CPT code 93042: Rhythm ECG, interpretation and report only2026 Medicare rate & RVUs in King County, WA

Reports a clinician’s interpretation of a one- to three-lead rhythm ECG when the professional reading is billed separately from tracing acquisition.

CMS RVU26DEffective Oct 1, 2026One payment locality255.7K Medicare services in 2024

In King County, WA, Medicare pays $7.58 for 93042 in the office and $7.58 when it’s performed in a hospital or facility.

$7.58Office (non-facility)
$7.58Hospital or facility
+8.1%vs the national office rate ($7.01)

Check a contract rate as a % of Medicare · 93042 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 93042 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in King County, WA
  2. What 93042 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 93042 covers

93042 represents the interpretation of a limited-lead rhythm ECG, typically a short tracing used to assess heart rate and rhythm, such as when evaluating suspected atrial fibrillation, ectopy, or another arrhythmia. It covers the interpretation and written report for a one- to three-lead rhythm recording, not acquisition of the tracing. Emergency physicians, cardiologists, and other clinicians who interpret ECGs may provide this service in emergency departments, hospitals, or offices.

Report 93042 when documentation supports a rhythm tracing and a corresponding interpretation and report, including the relevant findings and impression. Select it when billing only the professional reading; the technical portion has a separate code. When the same entity provides both tracing and interpretation, 93040 represents the combined rhythm ECG service. CMS classifies 93042 as professional-component-only, so it is not split with modifier 26.

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 93042

Across 109 of 109 payment localities, the office rate for 93042 runs from $6.62 in Arkansas to $9.48 in Alaska. King County, WA pays $7.58. The RVUs are the same everywhere; the geographic indexes change the dollars.

93042 in King County, WA vs other payment areas
  1. King County, WA · this page$7.58
  2. Rest of Washington · Washington$7.09−$0.49
  3. Los Angeles, CA · California$7.41−$0.17
  4. Washington, DC area · District of Columbia$7.62+$0.04
  5. Miami, FL · Florida$7.59+$0.01
  6. Chicago, IL · Illinois$7.49−$0.09
  7. Manhattan, NY · New York$7.80+$0.22

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

Every other payment area

93042 in every other Medicare payment locality
Payment localityOfficeFacility
AlaskaAlaska$9.48$9.48
AlabamaAlabama$6.66$6.66
ArkansasArkansas$6.62$6.62
ArizonaArizona$6.91$6.91
Bakersfield, CACalifornia$7.14$7.14
Chico, CACalifornia$7.10$7.10
El Centro, CACalifornia$7.11$7.11
Fresno, CACalifornia$7.10$7.10

93042 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.

$6.62

$9.48

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

View every state and territory as a table
93042 office rate range by state
State / territoryOffice rate rangeLocalities
AK$9.481
AL$6.661
AR$6.621
AZ$6.911
CA$7.10–$8.1529
CO$7.111
CT$7.311
DC$7.621
DE$6.991
FL$7.11–$7.593
GA$6.90–$7.122
GU$7.101
HI$7.101
IA$6.671
ID$6.701
IL$7.06–$7.494
IN$6.721
KS$6.691
KY$6.801
LA$6.81–$6.962
MA$7.12–$7.512
MD$7.06–$7.623
ME$6.75–$6.882
MI$6.91–$7.182
MN$6.831
MO$6.78–$6.933
MS$6.691
MT$7.011
NC$6.781
ND$6.821
NE$6.681
NH$7.041
NJ$7.40–$7.622
NM$6.941
NV$6.961
NY$6.83–$7.945
OH$6.871
OK$6.761
OR$6.91–$7.192
PA$6.86–$7.242
PR$7.031
RI$7.131
SC$6.841
SD$6.791
TN$6.711
TX$6.84–$7.178
UT$6.881
VA$6.89–$7.622
VI$7.031
VT$6.831
WA$7.09–$7.582
WI$6.711
WV$6.941
WY$6.931

See 93042 in every payment locality

How the 93042 rate is calculated

Each of 93042’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 · 93042

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.15

0.15 RVUs× 1.000 GPCI

Practice expense0.05

0.05 RVUs× 1.000 GPCI

Malpractice0.01

0.01 RVUs× 1.000 GPCI

Adjusted RVUs

0.2100

Conversion factor

$33.4009

Medicare rate

$7.01

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

11,948

Code
93042
Physician work
0.15
Practice expense
0.05
Malpractice
0.01

GPCI2026.csv

108

Locality
King County, WA
Physician work
1.050
Practice expense
1.227
Malpractice
0.817
Office calculation for 93042 in King County, WA
ComponentRVULocality factorAdjusted
Physician work0.15× 1.0500.1575
Practice expense0.05× 1.2270.0614
Malpractice0.01× 0.8170.0082
Total RVUs0.2270
Conversion factor× 33.4009

Office rate, King County, WA$7.58

Office: (0.15 × 1.05 + 0.05 × 1.227 + 0.01 × 0.817) × $33.4009 = $7.58

Facility: (0.15 × 1.05 + 0.05 × 1.227 + 0.01 × 0.817) × $33.4009 = $7.58

Open 93042 in the RVU calculator

Payment rules and modifiers for 93042

The CMS indicators that decide how 93042 is paid alongside other services.

CMS payment indicators · 93042

Rhythm ECG, interpretation and report only

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
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/technical2Professional component only.

Codes related to 93042

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

Codes related to 93042
CodeHow it relatesOffice range, King County, WA
Component of
93040Rhythm ECG, one to three leadsCombined rhythm ECG service that includes tracing acquisition and interpretation and report.$17.28
Same family
93041Rhythm ECG, tracing only, 1–3 leadsTechnical-only counterpart for a one- to three-lead rhythm ECG tracing.$9.70
Used instead
93010ECG interpretation, interpretation and report onlyInterpretation and report for a standard ECG rather than a limited-lead rhythm tracing.$9.10
93000Electrocardiogram (ECG), complete: tracing plus interpretationComplete standard ECG service, including tracing and interpretation and report.$17.57

How 93042 has changed in King County, WA

93042 · Office / nonfacility

$7.58

Effective 2026-10-01

The base rate is $0.66 higher than on 2025-10-01, moving from $6.92 to $7.58 (9.5%).

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

    $6.92changed to$7.58

    • Conversion factor 32.3465 changed to 33.4009
    • Practice expense RVU 0.04 changed to 0.05
    • 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

    $7.12changed to$6.92

    • Conversion factor 33.2875 changed to 32.3465

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $7.00changed to$7.12

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $7.19changed to$7.00

    • Conversion factor 33.8872 changed to 32.7442
    • 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

    $7.30changed to$7.19

    • Conversion factor 34.6062 changed to 33.8872
    • 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

    $7.36changed to$7.30

    • Conversion factor 34.8931 changed to 34.6062

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $7.58changed to$7.36

    • Conversion factor 36.0896 changed to 34.8931
    • 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

    $7.54changed to$7.58

    • Conversion factor 36.0391 changed to 36.0896
    • 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

    $7.53changed to$7.54

    • Conversion factor 35.9996 changed to 36.0391

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $7.43changed to$7.53

    • Conversion factor 35.8887 changed to 35.9996
    • 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

    $7.34changed to$7.43

    • Conversion factor 35.8043 changed to 35.8887
    • 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

    $7.36changed to$7.34

    • Conversion factor 35.9335 changed to 35.8043

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $7.33changed to$7.36

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $7.40changed to$7.33

    • Conversion factor 35.8228 changed to 35.7547
    • 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

    $7.48changed to$7.40

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 0.05 changed to 0.04
    • 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: $7.48

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$7.58$7.58RVU26D
2026-07-01$7.58$7.58RVU26C
2026-04-01$7.58$7.58RVU26B
2026-01-01$7.58$7.58RVU26A
2025-10-01$6.92$6.92RVU25D
2025-07-01$6.92$6.92RVU25C
2025-04-01$6.92$6.92RVU25B
2025-01-01$6.92$6.92RVU25A
2024-10-01$7.12$7.12RVU24D
2024-07-01$7.12$7.12RVU24C
2024-04-01$7.12$7.12RVU24B
2024-03-09$7.12$7.12RVU24AR
2024-01-01$7.00$7.00RVU24A
2023-10-01$7.19$7.19RVU23D
2023-07-01$7.19$7.19RVU23C
2023-04-01$7.19$7.19RVU23B
2023-01-01$7.19$7.19RVU23A
2022-10-01$7.30$7.30RVU22D
2022-07-01$7.30$7.30RVU22C
2022-04-01$7.30$7.30RVU22B
2022-01-01$7.30$7.30RVU22A
2021-10-01$7.36$7.36RVU21D
2021-07-01$7.36$7.36RVU21C
2021-04-01$7.36$7.36RVU21B
2021-01-01$7.36$7.36RVU21A
2020-10-01$7.58$7.58RVU20D
2020-07-01$7.58$7.58RVU20C
2020-04-01$7.58$7.58RVU20B
2020-01-01$7.58$7.58RVU20A
2019-10-01$7.54$7.54RVU19D
2019-07-01$7.54$7.54RVU19C
2019-04-01$7.54$7.54RVU19B
2019-01-01$7.54$7.54RVU19A
2018-10-01$7.53$7.53RVU18D
2018-07-01$7.53$7.53RVU18C
2018-04-01$7.53$7.53RVU18B
2018-01-01$7.53$7.53RVU18AR1
2017-10-01$7.43$7.43RVU17D
2017-07-01$7.43$7.43RVU17C
2017-04-01$7.43$7.43RVU17B
2017-01-01$7.43$7.43RVU17A
2016-10-01$7.34$7.34RVU16D
2016-07-01$7.34$7.34RVU16C
2016-04-01$7.34$7.34RVU16B
2016-01-01$7.34$7.34RVU16A
2015-10-01$7.36$7.36RVU15D
2015-07-01$7.36$7.36RVU15C
2015-04-01$7.33$7.33RVU15B
2015-01-01$7.33$7.33RVU15A
2014-10-01$7.40$7.40RVU14D
2014-07-01$7.40$7.40RVU14C
2014-04-01$7.40$7.40RVU14B
2014-01-01$7.40$7.40RVU14A
2013-10-01$7.48$7.48RVU13D
2013-07-01$7.48$7.48RVU13C
2013-04-01$7.48$7.48RVU13B
2013-01-01$7.48$7.48RVU13AR

Price 93042 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
  • 93042 in Auburn · multiple payment areas
  • Baring
  • Beaux Arts Village
  • Bellevue
  • Black Diamond

Browse all communities in Washington

93042 billing questions

What service does 93042 cover?

It covers interpretation and reporting of a one- to three-lead rhythm ECG. It does not cover acquisition of the tracing.

When should 93042 be used instead of 93040?

Use 93042 when billing only the professional interpretation and report. Use 93040 when the same service includes both the rhythm tracing and its interpretation and report.

Is the rhythm tracing included in 93042?

No. The tracing is the technical portion and has a separate code, 93041.

Should modifier 26 be appended to 93042?

No. 93042 already represents the professional interpretation and report only.

How does 93042 differ from 93010?

93042 reports interpretation of a limited-lead rhythm ECG. 93010 reports interpretation and report for a standard ECG rather than a limited-lead rhythm tracing.

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 93042PPRRVU2026_Oct_nonQPP.csv, line 11,948 (RVU26D)
Geographic factors for King County, WAGPCI2026.csv, line 108 (RVU26D)

Open CMS sourceHow we calculate rates

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