Gregory Piech, M.D., M.P.H.
Gastroenterology Physician · Ann Arbor, MI
Gregory Piech, M.D., M.P.H. is a gastroenterology physician with a practice address in Ann Arbor, Michigan, and NPI 1447645247, issued on Mar 30, 2015. Check the license (Michigan 4301510304, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Gregory Piech
- Credential
- M.D., M.P.H.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 4301510304 MI
MD470331 PA
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
- Mar 30, 2015
- Record last updated
- Oct 6, 2023
- Medicare enrollment
- Enrolled (PECOS I20231020000379); accepts Medicare assignment
- Medical or professional school
- Drexel University College Of Medicine, 2015
- 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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Verify Gregory Piech in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301510304Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average gastroenterology physician in 2024
259 Medicare Part D claims for 123 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Omeprazole49 claims
- Peg 3350-Electrolyte45 claims
- Linzess44 claims
- Famotidine20 claims
- Ondansetron Odt17 claims
- Pantoprazole Sodium17 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): 99 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).
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).
Gregory Piech among 550 gastroenterology physician records in Michigan
Gregory Piech, M.D., M.P.H. 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 2015, is newer than 84% of them.
- NPI issued2015 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2015 · median 2003 among the 415 with a school on file
- Record last updated2023 · 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
- Joseph Kolars, M.D.Ann Arbor, MI 481091447222005
- Hellan Kwon, MDAnn Arbor, MI 481091336152651
- Laurence McMahon, MDAnn Arbor, MI 481091417038647
- Stacy Menees, MDAnn Arbor, MI 481091508898081
Common questions
What is Gregory Piech, M.D., M.P.H.'s NPI number?
Gregory Piech, M.D., M.P.H.'s National Provider Identifier (NPI) is 1447645247, issued on Mar 30, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Piech, M.D., M.P.H. 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 Gregory Piech, M.D., M.P.H.'s license?
NPPES lists Michigan license number 4301510304, 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 Gregory Piech, M.D., M.P.H. prescribe under Medicare Part D?
In 2024, Gregory Piech, M.D., M.P.H. had 259 Medicare Part D claims for 123 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Gregory Piech, M.D., M.P.H.'s MIPS final score?
The 2023 MIPS final score is 99 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.