Michael Zamostny, D.O.
Internal Medicine Physician · Chillicothe, OH
Michael Zamostny, D.O. is an internal medicine physician with a practice address in Chillicothe, Ohio, and NPI 1659819928, issued on Feb 7, 2017. Check the license (Ohio 34.013630, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Michael Zamostny
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 34.013630 OH
TPOS436 FL
0102207507 VA
Self-reported in NPPES; status is on the state search - Practice location
- 446 Hospital RD, Chillicothe, OH 45601
- Phone
- (740) 779-7070
- Enumerated
- Feb 7, 2017
- Record last updated
- Aug 31, 2022
- Medicare enrollment
- Enrolled (PECOS I20200317001617); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,277 in Ohio → Look up another NPI →
Also registered at 446 Hospital RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Arch Johnson, D.O.Emergency Medicine Physician1093078198
Verify Michael Zamostny in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 34.013630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- Emergency Medicine Associates P.A., P.C.Charlottesville, VA
- Usacs Integrated Acute Care Services OF Ohio LLCSpringfield, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Zamostny among 5,277 internal medicine physician records in Ohio
Michael Zamostny, D.O. is one of 5,277 internal medicine physician records with a practice address in Ohio. 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 2017, is newer than 76% of them.
- NPI issued2017 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2017 · median 2006 among the 3,414 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 207R00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
64 internal medicine physician records list a practice address in Chillicothe
They are 64 of the 2,938 NPPES records with a practice address in Chillicothe, and 5,277 internal medicine physician records in Ohio.
All 5,277 in Ohio → Every provider in Chillicothe → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bhuvaneswari Chinnappan, M.D.Chillicothe, OH 456011154428480
- Lloyd Coats, D.O.Chillicothe, OH 456011477558906
- Douglas Folzenlogen, M.D.Chillicothe, OH 456011801891338
- Paul Jackson, MDChillicothe, OH 456011568409852
- Gopinath Nair, M.D.Chillicothe, OH 456011487765707
- Zoran Naumovski, MDChillicothe, OH 456011326041138
- Thomas OommenChillicothe, OH 456011346324993
- Indravadan Parikh, M.D., F.A.C.P.Chillicothe, OH 456011659471159
Common questions
What is Michael Zamostny, D.O.'s NPI number?
Michael Zamostny, D.O.'s National Provider Identifier (NPI) is 1659819928, issued on Feb 7, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Michael Zamostny, D.O. located?
The NPPES record lists a practice address at 446 Hospital RD, Chillicothe, OH, 45601. Phone: (740) 779-7070. Providers update this record themselves, so call before visiting.
How can I verify Michael Zamostny, D.O.'s license?
NPPES lists Ohio license number 34.013630, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Zamostny, D.O. prescribe under Medicare Part D?
In 2024, Michael Zamostny, D.O. had 11 Medicare Part D claims; 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.