Mark Ostahowski, M.D.
NPI 1184719601 · Family Medicine Physician · Midland, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ostahowski, M.D. is a Family Medicine Physician provider in Midland, MI (NPI 1184719601).
Provider details
- NPI number
- 1184719601
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MO048872 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-03
- Last updated
- 2022-07-21
Frequently asked questions
- What is Mark Ostahowski's NPI number?
- Mark Ostahowski's National Provider Identifier (NPI) is 1184719601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ostahowski's specialty?
- Mark Ostahowski is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ostahowski located?
- Mark Ostahowski's practice location on file with NPPES is 920 West Wackerly Street, Midland, MI 48640.
- What is Mark Ostahowski's phone number?
- The practice phone number listed in the NPPES registry for Mark Ostahowski is (989) 839-9937.
- Does Mark Ostahowski accept Medicare?
- Mark Ostahowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ostahowski's NPI active?
- Yes — Mark Ostahowski's NPI (1184719601) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.