Michael A. Marshall, MD
Internal Medicine Physician · Southfield, MI
Michael A. Marshall, MD is an internal medicine physician with a practice address in Southfield, Michigan, and NPI 1487654091, issued on Jul 26, 2005. Check the license (Michigan 4301035094, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Michael A. Marshall
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301035094 MI
Self-reported in NPPES; status is on the state search - Practice location
- 22255 Greenfield RD, Southfield, MI 48075
- Phone
- (248) 849-2850
- Enumerated
- Jul 26, 2005
- Record last updated
- Feb 24, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (248) 849-5751
- Medicaid ID
- 448574110 MI
- Medicare enrollment
- Enrolled (PECOS I20100422000827); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1974
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 22255 Greenfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rosanne Adams, R.N.,B.S.N., CDEDiabetes Educator Registered Nurse1316125669
- Shelley Adams, PTPhysical Therapist1144729054
- Jayme Aschemeyer, D.O., M.S.Endocrinology, Diabetes & Metabolism Physician1548581861
- Mark Baldwin, PA-CPhysician Assistant1952506271
- Anant Bhogaonker, MDPediatrics Physician1457333718
- William Blessed, MDMaternal & Fetal Medicine Physician1235136599
Verify Michael A. Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301035094Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,563 Medicare Part D claims for 498 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 243 claims were for opioids.
Most prescribed
- Amlodipine Besylate467 claims
- Atorvastatin Calcium440 claims
- Losartan Potassium246 claims
- Metformin Hcl180 claims
- Lisinopril178 claims
- Carvedilol169 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): 80.5 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).
Industry payments in 2024: $40.28
2 payments; by number, the most common kind was food and beverage; the largest payer was Axsome Therapeutics, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Henry Ford Health Providence HospitalSouthfield, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael A. Marshall among 5,735 internal medicine physician records in Michigan
Michael A. Marshall, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1974 · median 2006 among the 3,564 with a school on file
- Record last updated2011 · 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).
200 internal medicine physician records list a practice address in Southfield
They are 200 of the 5,689 NPPES records with a practice address in Southfield, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Southfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Valerie Abbott, MDSouthfield, MI 480751740289487
- Nagashree Chandrashekar, MDSouthfield, MI 480751821092750
- Peggy Cheng, MDSouthfield, MI 480751760467104
- Ted Coy, MDSouthfield, MI 480751740273069
- Leonard Ellison, MDSouthfield, MI 480751679575328
- John Frownfelter, MDSouthfield, MI 480751548268626
- Houston Johnson, MDSouthfield, MI 480751245238872
- Athanasius Lobo, M.D.Southfield, MI 480751295719896
Common questions
What is Michael A. Marshall, MD's NPI number?
Michael A. Marshall, MD's National Provider Identifier (NPI) is 1487654091, issued on Jul 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Marshall, MD located?
The NPPES record lists a practice address at 22255 Greenfield RD, Southfield, MI, 48075. Phone: (248) 849-2850. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Marshall, MD's license?
NPPES lists Michigan license number 4301035094, 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 Michael A. Marshall, MD prescribe under Medicare Part D?
In 2024, Michael A. Marshall, MD had 7,563 Medicare Part D claims for 498 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Michael A. Marshall, MD's MIPS final score?
The 2023 MIPS final score is 80.5 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.