Donald Mazanowski, M.D.
NPI 1609961069 · Family Medicine Physician · Keene, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Mazanowski, M.D. is a Family Medicine Physician provider in Keene, NH (NPI 1609961069).
Provider details
- NPI number
- 1609961069
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 7917 (NH)
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
- 2012-04-05
Frequently asked questions
- What is Donald Mazanowski's NPI number?
- Donald Mazanowski's National Provider Identifier (NPI) is 1609961069, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Mazanowski's specialty?
- Donald Mazanowski is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Mazanowski located?
- Donald Mazanowski's practice location on file with NPPES is 590 Court St, Keene, NH 03431-1719.
- What is Donald Mazanowski's phone number?
- The practice phone number listed in the NPPES registry for Donald Mazanowski is (603) 354-5400.
- Does Donald Mazanowski accept Medicare?
- Donald Mazanowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Mazanowski's NPI active?
- Yes — Donald Mazanowski's NPI (1609961069) is active in the NPPES registry as of the last update on 2012-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.