Joseph Charles Kolars, M.D.
Gastroenterology Physician · Ann Arbor, MI
Joseph Charles Kolars, M.D. is a gastroenterology physician with a practice address in Ann Arbor, Michigan, and NPI 1447222005, issued on Feb 7, 2006. Check the license (Michigan 4301051651, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Joseph Charles Kolars
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 4301051651 MI
28528 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-4000
- Enumerated
- Feb 7, 2006
- Record last updated
- May 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid IDs
- 35169200 WI
887526000 MN
ENROLLED IA - Medicare enrollment
- Enrolled (PECOS I20090706000302); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1982
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 550 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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- Nicole Abbott, CRNACertified Registered Nurse Anesthetist1790329860
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Verify Joseph Charles Kolars in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301051651Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average gastroenterology physician in 2024
147 Medicare Part D claims for 55 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Peg 3350-Electrolyte18 claims
- Creon15 claims
- Omeprazole14 claims
- Famotidine12 claims
- Pyridostigmine Bromide12 claims
- Loperamide11 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 one group practice
- 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).
Joseph Charles Kolars among 550 gastroenterology physician records in Michigan
Joseph Charles Kolars, M.D. is one of 550 gastroenterology physician records with a practice address in Michigan. 85% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 50% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1982 · median 2003 among the 415 with a school on file
- Record last updated2020 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Michigan
There are 550 gastroenterology physician records in Michigan.
All 550 in Michigan → Every provider in Ann Arbor → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- John Allen, MDAnn Arbor, MI 481091154393502
- Frederick Askari, MD, PHDAnn Arbor, MI 481091689756108
- Hari Conjeevaram, MDAnn Arbor, MI 481091831271360
- Grace Elta, MDAnn Arbor, MI 481091275615700
- Hellan Kwon, MDAnn Arbor, MI 481091336152651
- Laurence McMahon, MDAnn Arbor, MI 481091417038647
- Stacy Menees, MDAnn Arbor, MI 481091508898081
- Mary Mortell, M.D.Ann Arbor, MI 481091851370142
Common questions
What is Joseph Charles Kolars, M.D.'s NPI number?
Joseph Charles Kolars, M.D.'s National Provider Identifier (NPI) is 1447222005, issued on Feb 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Charles Kolars, M.D. located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-4000. Providers update this record themselves, so call before visiting.
How can I verify Joseph Charles Kolars, M.D.'s license?
NPPES lists Michigan license number 4301051651, 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 Joseph Charles Kolars, M.D. prescribe under Medicare Part D?
In 2024, Joseph Charles Kolars, M.D. had 147 Medicare Part D claims for 55 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.