Mary Margaret Johnson, MD
Internal Medicine Physician · Marshall, MI
Mary Margaret Johnson, MD is an internal medicine physician with a practice address in Marshall, Michigan, and NPI 1053400291, issued on Oct 12, 2006. Check the license (Michigan 4301050976, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Mary Margaret Johnson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301050976 MI
Self-reported in NPPES; status is on the state search - Practice location
- 200 N Madison St, Marshall, MI 49068
- Phone
- (269) 781-4271
- Enumerated
- Oct 12, 2006
- Record last updated
- Dec 12, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 2791817 MI
- Medicare enrollment
- Enrolled (PECOS I20081107000566); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 200 N Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tescha Carr, P.A.Physician Assistant1710091913
- Michael Cole, CRNACertified Registered Nurse Anesthetist1376643197
- Howard Drews, CRNACertified Registered Nurse Anesthetist1336444041
Verify Mary Margaret Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301050976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
244 Medicare Part D claims for 143 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levofloxacin30 claims
- Azithromycin28 claims
- Prednisone19 claims
- Pantoprazole Sodium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 92.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Apogee Medical Group Michigan PCMarshall, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Margaret Johnson among 5,735 internal medicine physician records in Michigan
Mary Margaret Johnson, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1984 · median 2006 among the 3,564 with a school on file
- Record last updated2014 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 internal medicine physician records list a practice address in Marshall
They are 7 of the 309 NPPES records with a practice address in Marshall, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Marshall → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Aparna KanaparthiMarshall, MI 490681699885616
- Michael Meyer, D.O.Marshall, MI 490681164469318
- Mahboobeh SaifiabolhassanMarshall, MI 490681558930875
- Jeremiah Schnoor, M.D.Marshall, MI 490681437476355
- Karina Torres Crespo, MDMarshall, MI 490681437891926
- Jose Valle, M.D.Marshall, MI 490681649227604
- Scott Brasseur, M.D.Hastings, MI 490581992709562
- Edward Erbter, D.O.Hastings, MI 490581376520106
Common questions
What is Mary Margaret Johnson, MD's NPI number?
Mary Margaret Johnson, MD's National Provider Identifier (NPI) is 1053400291, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaret Johnson, MD located?
The NPPES record lists a practice address at 200 N Madison St, Marshall, MI, 49068. Phone: (269) 781-4271. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaret Johnson, MD's license?
NPPES lists Michigan license number 4301050976, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Margaret Johnson, MD prescribe under Medicare Part D?
In 2024, Mary Margaret Johnson, MD had 244 Medicare Part D claims for 143 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mary Margaret Johnson, MD's MIPS final score?
The 2023 MIPS final score is 92.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.