DR. MICHAEL ZAMOSTNY D.O.
NPI 1659819928
Internal Medicine in Chillicothe, OH
About Dr. Michael Zamostny D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL ZAMOSTNY D.O. (NPI 1659819928) is an individual internal medicine provider in Chillicothe, Ohio, licensed in Ohio (34.013630) and active in the NPI registry since February 2017. He is enrolled in Medicare PECOS, is affiliated with Mercy Health - Fairfield Hospital, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Michael Zamostny D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Michael Zamostny reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chillicothe, OH 45601
- Reassigned Medicare billing, Ohio enrollment
- 763 clinicians in this Medicare group
Springfield, OH 45504
- Reassigned Medicare billing, Ohio enrollment
- 494 clinicians in this Medicare group
Ashtabula, OH 44004
- Reassigned Medicare billing, Ohio enrollment
- 272 clinicians in this Medicare group
Culpeper, VA 22701
- Reassigned Medicare billing, Virginia enrollment
- 1,294 clinicians in this Medicare group
Port Jefferson, NY 11777
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Port Emergency Medical Services PC
- 90 clinicians in this Medicare group
Cedar Park, TX 78613
- Reassigned Medicare billing, Texas enrollment
- 828 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Health - Fairfield Hospital
Acute Care Hospitals · Fairfield, OHMercy Health - West Hospital
Acute Care Hospitals · Cincinnati, OHMercy Health - Clermont Hospital
Acute Care Hospitals · Batavia, OHAdams County Regional Medical Center
Critical Access Hospitals · Seaman, OHSentara Martha Jefferson Hospital
Acute Care Hospitals · Charlottesville, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 45601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Michael Zamostny's NPI number?
The NPI number for Michael Zamostny is 1659819928. It was assigned to this individual provider in the NPPES registry on February 7, 2017.
Where is Michael Zamostny located?
Michael Zamostny practices at 446 Hospital Rd, Chillicothe, OH 45601. The listed phone number is (740) 779-7070.
What is Michael Zamostny's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael Zamostny enrolled in Medicare?
Yes. Michael Zamostny is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Michael Zamostny's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Zamostny reassigns Medicare benefits to 6 organizations: Adena Medical Group LLC (Chillicothe, OH), Usacs Integrated Acute Care Services Of Ohio, LLC (Springfield, OH), Apogee Medical Group Ohio Inc (Ashtabula, OH), Emergency Medicine Associates P.A., P.C. (Culpeper, VA), Port Emergency Medical Services, P.C. (Port Jefferson, NY) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael Zamostny's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Zamostny accept?
Health plans from Antidote Health Plan of Ohio, Inc., Blue Cross and Blue Shield of Texas, CareSource and Sendero Health Plans, Local Nonprofit list Michael Zamostny as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Michael Zamostny affiliated with any hospitals?
According to CMS data, Michael Zamostny is affiliated with Mercy Health - Fairfield Hospital, Mercy Health - West Hospital, Mercy Health - Clermont Hospital, Adams County Regional Medical Center and Sentara Martha Jefferson Hospital.
When was this NPI record last updated?
The NPPES record for Michael Zamostny was last updated on August 31, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Michael Zamostny, D.O. · NPI 1659819928
Internal Medicine physician in Chillicothe, Ohio. Individual provider, active in the CMS NPPES registry since February 7, 2017.
## Identity
- **NPI:** 1659819928 (Entity type: Individual)
- **Enumerated:** February 7, 2017
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 34.013630 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 446 HOSPITAL RD, Chillicothe, OH 45601-9030
- **Phone:** (740) 779-7070
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Adena Medical Group LLC (NPI 1235468083, Chillicothe, OH); Usacs Integrated Acute Care Services Of Ohio, LLC (NPI 1043805690, Springfield, OH); Apogee Medical Group Ohio Inc (NPI 1477500999, Ashtabula, OH); Emergency Medicine Associates P.A., P.C. (NPI 1881559102, Culpeper, VA); Port Emergency Medical Services, P.C. (NPI 1912988395, Port Jefferson, NY); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** August 31, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1659819928) · Data from the CMS NPPES public registry.