Mark S. Harrison, MD
Infectious Disease Physician · Saint Joseph, MI
Mark S. Harrison, MD is an infectious disease physician with a practice address in Saint Joseph, Michigan, and NPI 1346278108, issued on Jun 29, 2006. Check the license (Michigan 4301407295, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Mark S. Harrison
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 4301407295 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1234 Napier Ave, Saint Joseph, MI 49085
- Phone
- (269) 471-1700
- Enumerated
- Jun 29, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (269) 471-1975
- Medicaid ID
- 4382664 MI
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 301 in Michigan → Look up another NPI →
Also registered at 1234 Napier Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erik Achramowicz, D.O.Emergency Medicine Physician1598027245
- Scott Achramowicz, PAPhysician Assistant1295244630
- Joseph Aderemi, MDPsychiatry Physician1831726546
- Kristina Aleksoniene, MDInfectious Disease Physician1659545002
- Sydney Alexander, DOFamily Medicine Physician1144952698
- Robert Allen, MDCritical Care Medicine (Internal Medicine) Physician1073540647
Verify Mark S. Harrison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301407295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average infectious disease physician in 2024
161 Medicare Part D claims for 36 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Atorvastatin Calcium16 claims
- Losartan Potassium11 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Mark S. Harrison among 301 infectious disease physician records in Michigan
Mark S. Harrison, MD is one of 301 infectious disease physician records with a practice address in Michigan. 81% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2023 · 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 207RI0200X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Michigan
There are 301 infectious disease physician records in Michigan.
All 301 in Michigan → Every provider in Saint Joseph → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Kristina Aleksoniene, MDSaint Joseph, MI 490851659545002
- Richard Douce, MDSaint Joseph, MI 490851952317976
- Michael Wang, MDSaint Joseph, MI 490851912913302
- Jason Tompkins, MDNiles, MI 491201336177864
- Aurora Madanguit, MDColoma, MI 490381619902855
- Grace Kulhanek, M.D.Battle Creek, MI 490371295858553
- Donald Batts, M.D.Battle Creek, MI 490171083683171
- Mohamad Mooty, MDBattle Creek, MI 490171780693184
Common questions
What is Mark S. Harrison, MD's NPI number?
Mark S. Harrison, MD's National Provider Identifier (NPI) is 1346278108, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Harrison, MD located?
The NPPES record lists a practice address at 1234 Napier Ave, Saint Joseph, MI, 49085. Phone: (269) 471-1700. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Harrison, MD's license?
NPPES lists Michigan license number 4301407295, 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 Mark S. Harrison, MD prescribe under Medicare Part D?
In 2024, Mark S. Harrison, MD had 161 Medicare Part D claims for 36 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Mark S. Harrison, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.