Mark Kluk, MD
Internal Medicine Physician · Ann Arbor, MI
Mark Kluk, MD is an internal medicine physician with a practice address in Ann Arbor, Michigan, and NPI 1023499050, issued on Jun 16, 2015. Check the license (Michigan 4301509636, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Mark Kluk
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 4301509636 MI
036.149600 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 647-5299
- Enumerated
- Jun 16, 2015
- Record last updated
- Nov 1, 2023
- Medicare enrollment
- Enrolled (PECOS I20230831001117); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1500 E Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Kluk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301509636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
290 Medicare Part D claims for 97 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 12 claims were for opioids.
Most prescribed
- Torsemide23 claims
- Furosemide20 claims
- Spironolactone19 claims
- Cephalexin15 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.
Bills Medicare through 2 group practices
- Chelsea Community HospitalChelsea, MI
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Kluk among 5,735 internal medicine physician records in Michigan
Mark Kluk, 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 2015, is newer than 66% of them.
- NPI issued2015 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2006 among the 3,564 with a school on file
- 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 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
479 internal medicine physician records list a practice address in Ann Arbor
They are 479 of the 15,616 NPPES records with a practice address in Ann Arbor, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Ann Arbor → Internal Medicine Physician nationwide →
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- Rawden Evans, MDAnn Arbor, MI 481091699718395
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Common questions
What is Mark Kluk, MD's NPI number?
Mark Kluk, MD's National Provider Identifier (NPI) is 1023499050, issued on Jun 16, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Mark Kluk, MD located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 647-5299. Providers update this record themselves, so call before visiting.
How can I verify Mark Kluk, MD's license?
NPPES lists Michigan license number 4301509636, 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 Kluk, MD prescribe under Medicare Part D?
In 2024, Mark Kluk, MD had 290 Medicare Part D claims for 97 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.