Marcus E. Koss, M.D.
Family Medicine Physician · Saint Clair Shores, MI
Marcus E. Koss, M.D. is a family medicine physician with a practice address in Saint Clair Shores, Michigan, and NPI 1750300679, issued on Jul 19, 2006. Check the license (Michigan 4301074604, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Marcus E. Koss
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301074604 MI
Self-reported in NPPES; status is on the state search - Practice location
- 21603 E 11 Mile RD, Saint Clair Shores, MI 48081
- Phone
- (586) 280-2100
- Enumerated
- Jul 19, 2006
- Record last updated
- Apr 14, 2022
- Fax
- (586) 210-8808
- Medicare enrollment
- Enrolled (PECOS I20050609001035); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 21603 E 11 Mile RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexandra Dadich, AUDAudiologist1033632898
Verify Marcus E. Koss in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301074604Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average family medicine physician in 2024
1,112 Medicare Part D claims for 96 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium85 claims
- Lisinopril66 claims
- Albuterol Sulfate Hfa62 claims
- Amlodipine Besylate54 claims
- Levothyroxine Sodium43 claims
- Metformin Hcl39 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.
Marcus E. Koss among 6,013 family medicine physician records in Michigan
Marcus E. Koss, M.D. is one of 6,013 family medicine physician records with a practice address in Michigan. 75% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 56% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1999 · median 2008 among the 3,493 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 family medicine physician records list a practice address in Saint Clair Shores
They are 79 of the 1,255 NPPES records with a practice address in Saint Clair Shores, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Saint Clair Shores → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Maurice Belkin, D.O.St Clair Shores, MI 480811295778926
- Christopher Blue, MDSaint Clair Shores, MI 480811265637458
- Eliisa Bojanic, MDSaint Clair Shores, MI 480811891280350
- Melissa Jennings, M.D.Saint Clair Shores, MI 480811891145439
- Amitha Parvataneni, MDSaint Clair Shores, MI 480811336326362
- Tabassum Qureshi, MDSaint Clair Shores, MI 480811215143847
- Nabil Rizk, M.D.St Clair Shores, MI 480811861493124
- James Rosbolt, D.O.Saint Clair Shores, MI 480811629093158
Common questions
What is Marcus E. Koss, M.D.'s NPI number?
Marcus E. Koss, M.D.'s National Provider Identifier (NPI) is 1750300679, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marcus E. Koss, M.D. located?
The NPPES record lists a practice address at 21603 E 11 Mile RD, Saint Clair Shores, MI, 48081. Phone: (586) 280-2100. Providers update this record themselves, so call before visiting.
How can I verify Marcus E. Koss, M.D.'s license?
NPPES lists Michigan license number 4301074604, 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 Marcus E. Koss, M.D. prescribe under Medicare Part D?
In 2024, Marcus E. Koss, M.D. had 1,112 Medicare Part D claims for 96 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.