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CPT code 20200: Muscle biopsy, superficial, open approach2026 Medicare rate & RVUs in Detroit, MI

Reports an open biopsy of an accessible superficial skeletal muscle when tissue is needed to investigate suspected muscle disease.

CMS RVU26DEffective Oct 1, 2026One payment locality505 Medicare services in 2024

In Detroit, MI, Medicare pays $243.93 for 20200 in the office and $97.60 when it’s performed in a hospital or facility.

$243.93Office (non-facility)
$97.60Hospital or facility
+0.9%vs the national office rate ($241.82)

Check a contract rate as a % of Medicare · 20200 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 20200 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Detroit, MI
  2. What 20200 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 20200 covers

A physician obtains a small sample of accessible skeletal muscle through an open incision for diagnostic examination. Neurologists and surgeons may perform this procedure when evaluation of conditions such as inflammatory myopathy, muscular dystrophy, or metabolic muscle disease requires tissue. The specimen may be sent for histologic or other laboratory studies. This code describes a superficial muscle biopsy, not a needle sample or an open biopsy of a deeper muscle.

Select the code based on the muscle’s depth and the approach documented in the operative report. Documentation should identify the sampled muscle and site, the open approach, and the diagnostic reason for obtaining tissue. The 0-day global period includes same-day preoperative and postoperative care. If 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% reduction. Modifier 50 is inappropriate. Medicare does not pay an assistant at surgery for this code, and 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 Detroit, MI compares for 20200

Across 109 of 109 payment localities, the office rate for 20200 runs from $210.16 in Arkansas to $321.76 in San Benito County, CA. Detroit, MI pays $243.93. The RVUs are the same everywhere; the geographic indexes change the dollars.

20200 in Detroit, MI vs other payment areas
  1. Detroit, MI · this page$243.93
  2. Rest of Michigan · Michigan$227.58−$16.35
  3. Los Angeles, CA · California$272.93+$29.00
  4. Washington, DC area · District of Columbia$278.18+$34.25
  5. Miami, FL · Florida$268.18+$24.25
  6. Chicago, IL · Illinois$259.07+$15.14
  7. Manhattan, NY · New York$281.59+$37.66

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

Every other payment area

20200 in every other Medicare payment locality
Payment localityOfficeFacility
AlaskaAlaska$271.82$110.32
AlabamaAlabama$213.70$81.02
ArkansasArkansas$210.16$79.90
ArizonaArizona$234.40$87.46
Bakersfield, CACalifornia$255.37$89.17
Chico, CACalifornia$254.37$88.17
El Centro, CACalifornia$254.43$88.23
Fresno, CACalifornia$254.37$88.17

20200 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.

$210.16

$288.07

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

View every state and territory as a table
20200 office rate range by state
State / territoryOffice rate rangeLocalities
AK$271.821
AL$213.701
AR$210.161
AZ$234.401
CA$254.37–$321.7629
CO$251.341
CT$259.381
DC$278.181
DE$238.631
FL$240.03–$268.183
GA$224.54–$247.362
GU$261.561
HI$261.561
IA$218.901
ID$220.751
IL$232.94–$259.074
IN$222.181
KS$218.221
KY$220.571
LA$220.37–$232.762
MA$249.72–$277.722
MD$243.47–$278.183
ME$222.59–$235.622
MI$227.58–$243.932
MN$238.401
MO$216.38–$233.113
MS$213.291
MT$241.801
NC$225.161
ND$234.481
NE$220.121
NH$247.741
NJ$261.67–$274.782
NM$229.201
NV$239.941
NY$229.05–$289.855
OH$226.081
OK$219.591
OR$237.42–$259.622
PA$226.22–$252.522
PR$243.641
RI$247.401
SC$226.131
SD$233.621
TN$219.541
TX$224.56–$251.078
UT$229.641
VA$235.09–$278.182
VI$243.641
VT$233.901
WA$249.13–$283.252
WI$225.631
WV$223.301
WY$238.611

See 20200 in every payment locality

How the 20200 rate is calculated

Each of 20200’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 · 20200

RVUs × geographic indexes × conversion factor

Office or facility?

Work1.42

1.42 RVUs× 1.000 GPCI

Practice expense5.45

5.45 RVUs× 1.000 GPCI

Malpractice0.37

0.37 RVUs× 1.000 GPCI

Adjusted RVUs

7.2400

Conversion factor

$33.4009

Medicare rate

$241.82

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

The exact Detroit, MI inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

1,727

Code
20200
Physician work
1.42
Practice expense
5.45
Malpractice
0.37

GPCI2026.csv

64

Locality
Detroit, MI
Physician work
1.000
Practice expense
0.965
Malpractice
1.686
Office calculation for 20200 in Detroit, MI
ComponentRVULocality factorAdjusted
Physician work1.42× 1.0001.4200
Practice expense5.45× 0.9655.2592
Malpractice0.37× 1.6860.6238
Total RVUs7.3031
Conversion factor× 33.4009

Office rate, Detroit, MI$243.93

Office: (1.42 × 1 + 5.45 × 0.965 + 0.37 × 1.686) × $33.4009 = $243.93

Facility: (1.42 × 1 + 0.91 × 0.965 + 0.37 × 1.686) × $33.4009 = $97.60

Open 20200 in the RVU calculator

Payment rules and modifiers for 20200

The CMS indicators that decide how 20200 is paid alongside other services.

CMS payment indicators · 20200

Muscle biopsy, superficial, open approach

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)1Not paid (statutory restriction).
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

20200 without 51 · national office

$241.82

Muscle biopsy, superficial, open approach

20200-51 · Second procedure: 50%

$120.91

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

Codes related to 20200

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

Codes related to 20200
CodeHow it relatesOffice range, Detroit, MI
Same family
20205Muscle biopsy, open deep-muscle approachOpen muscle biopsy when the sampled muscle is deep rather than superficial.$345.16
Used instead
20206Muscle biopsy, percutaneous needle approachPercutaneous needle approach for obtaining a muscle biopsy specimen.$206.20
Often billed with
88305Tissue pathology exam, level IV specimenMay be reported by the laboratory for pathologic examination of the muscle specimen.$69.02

How 20200 has changed in Detroit, MI

20200 · Office / nonfacility

$243.93

Effective 2026-10-01

The base rate is $29.37 higher than on 2025-10-01, moving from $214.56 to $243.93 (13.7%).

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

    $214.56changed to$243.93

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 1.46 changed to 1.42
    • Practice expense RVU 4.58 changed to 5.45
    • Malpractice RVU 0.38 changed to 0.37
    • Work GPCI 1.003 changed to 1.000
    • Practice expense GPCI 0.986 changed to 0.965
    • Malpractice GPCI 1.718 changed to 1.686

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $223.18changed to$214.56

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 4.67 changed to 4.58
    • Malpractice RVU 0.37 changed to 0.38

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $219.54changed to$223.18

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $229.75changed to$219.54

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 4.74 changed to 4.67
    • Work GPCI 1.000 changed to 1.003
    • Practice expense GPCI 0.992 changed to 0.986
    • Malpractice GPCI 1.670 changed to 1.718

  5. January 1, 2023

    RVU23A

    $236.82changed to$229.75

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 4.83 changed to 4.74
    • Malpractice RVU 0.35 changed to 0.37
    • Practice expense GPCI 0.997 changed to 0.992
    • Malpractice GPCI 1.622 changed to 1.670

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $240.30changed to$236.82

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 4.89 changed to 4.83
    • Malpractice RVU 0.34 changed to 0.35

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $226.29changed to$240.30

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 4.26 changed to 4.89
    • Malpractice RVU 0.35 changed to 0.34
    • Practice expense GPCI 0.993 changed to 0.997
    • Malpractice GPCI 1.657 changed to 1.622

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $221.76changed to$226.29

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 4.13 changed to 4.26
    • Malpractice RVU 0.36 changed to 0.35
    • Practice expense GPCI 0.989 changed to 0.993
    • Malpractice GPCI 1.691 changed to 1.657

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $219.38changed to$221.76

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 4.07 changed to 4.13

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $217.35changed to$219.38

    • Conversion factor 35.8887 changed to 35.9996
    • Malpractice RVU 0.37 changed to 0.36
    • Practice expense GPCI 0.992 changed to 0.989
    • Malpractice GPCI 1.510 changed to 1.691

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $214.72changed to$217.35

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense GPCI 0.994 changed to 0.992
    • Malpractice GPCI 1.328 changed to 1.510

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $215.85changed to$214.72

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 4.08 changed to 4.07

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $214.77changed to$215.85

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $216.86changed to$214.77

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 4.04 changed to 4.08
    • Malpractice RVU 0.32 changed to 0.37
    • Work GPCI 1.010 changed to 1.000
    • Practice expense GPCI 1.009 changed to 0.994
    • Malpractice GPCI 1.571 changed to 1.328

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $227.76changed to$216.86

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 4.50 changed to 4.04
    • Malpractice RVU 0.33 changed to 0.32
    • Work GPCI 1.022 changed to 1.010
    • Practice expense GPCI 1.023 changed to 1.009
    • Malpractice GPCI 1.814 changed to 1.571

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $227.76

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$243.93$97.60RVU26D
2026-07-01$243.93$97.60RVU26C
2026-04-01$243.93$97.60RVU26B
2026-01-01$243.93$97.60RVU26A
2025-10-01$214.56$102.29RVU25D
2025-07-01$214.56$102.29RVU25C
2025-04-01$214.56$102.29RVU25B
2025-01-01$214.56$102.29RVU25A
2024-10-01$223.18$103.71RVU24D
2024-07-01$223.18$103.71RVU24C
2024-04-01$223.18$103.71RVU24B
2024-03-09$223.18$103.71RVU24AR
2024-01-01$219.54$102.02RVU24A
2023-10-01$229.75$104.03RVU23D
2023-07-01$229.75$104.03RVU23C
2023-04-01$229.75$104.03RVU23B
2023-01-01$229.75$104.03RVU23A
2022-10-01$236.82$103.98RVU22D
2022-07-01$236.82$103.98RVU22C
2022-04-01$236.82$103.98RVU22B
2022-01-01$236.82$103.98RVU22A
2021-10-01$240.30$103.58RVU21D
2021-07-01$240.30$103.58RVU21C
2021-04-01$240.30$103.58RVU21B
2021-01-01$240.30$103.58RVU21A
2020-10-01$226.29$106.59RVU20D
2020-07-01$226.29$106.59RVU20C
2020-04-01$226.29$106.59RVU20B
2020-01-01$226.29$106.59RVU20A
2019-10-01$221.76$106.99RVU19D
2019-07-01$221.76$106.99RVU19C
2019-04-01$221.76$106.99RVU19B
2019-01-01$221.76$106.99RVU19A
2018-10-01$219.38$107.23RVU18D
2018-07-01$219.38$107.23RVU18C
2018-04-01$219.38$107.23RVU18B
2018-01-01$219.38$107.23RVU18AR1
2017-10-01$217.35$105.56RVU17D
2017-07-01$217.35$105.56RVU17C
2017-04-01$217.35$105.56RVU17B
2017-01-01$217.35$105.56RVU17A
2016-10-01$214.72$102.97RVU16D
2016-07-01$214.72$102.97RVU16C
2016-04-01$214.72$102.97RVU16B
2016-01-01$214.72$102.97RVU16A
2015-10-01$215.85$103.34RVU15D
2015-07-01$215.85$103.34RVU15C
2015-04-01$214.77$102.82RVU15B
2015-01-01$214.77$102.82RVU15A
2014-10-01$216.86$104.81RVU14D
2014-07-01$216.86$104.81RVU14C
2014-04-01$216.86$104.81RVU14B
2014-01-01$216.86$104.81RVU14A
2013-10-01$227.76$106.63RVU13D
2013-07-01$227.76$106.63RVU13C
2013-04-01$227.76$106.63RVU13B
2013-01-01$227.76$106.63RVU13AR

Price 20200 for an earlier date of service

Where the Detroit, MI rate applies

Detroit, MI is a Medicare payment area, not a city. Our Census mapping connects it to 98 cities and communities in Michigan. Some span more than one payment area; confirm with the service ZIP.

  • Detroit
  • Allen Park
  • Ann Arbor
  • Armada
  • Auburn Hills
  • Barton Hills
  • Belleville
  • Berkley

Browse all communities in Michigan

20200 billing questions

How does this differ from 20205?

Use 20200 for an open biopsy of superficial muscle. Code 20205 describes an open biopsy of deep muscle.

When is 20206 more appropriate?

Code 20206 describes a percutaneous needle muscle biopsy. Use 20200 when the documented method is an open biopsy of superficial muscle.

Can modifier 50 be used for biopsies on both sides?

No. The CMS bilateral adjustment does not apply, and modifier 50 is inappropriate for this code.

Is same-day postoperative care separately included?

The code has a 0-day global period, which includes same-day preoperative and postoperative care.

Can an assistant or co-surgeon report this procedure?

Medicare does not pay an assistant-at-surgery claim for 20200. Co-surgeons and team surgery are not permitted.

What documentation supports reporting 20200?

The operative report should identify the muscle and site, establish that the biopsy was open and superficial, and state why tissue was obtained.

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 20200PPRRVU2026_Oct_nonQPP.csv, line 1,727 (RVU26D)
Geographic factors for Detroit, MIGPCI2026.csv, line 64 (RVU26D)

Open CMS sourceHow we calculate rates

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