Alexander Mast, DO
NPI 1679920755 · Pediatrics Physician · Saint Marys, OH
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Mast, DO is a Pediatrics Physician provider in Saint Marys, OH (NPI 1679920755).
Provider details
- NPI number
- 1679920755
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101024607 (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
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 801 Pro Dr Ste D5Celina, OH 45822-3307Phone: (419) 394-9579Fax: (419) 394-9580
Registry dates
- Enumerated
- 2016-05-19
- Last updated
- 2023-08-02
- Certified
- 2023-08-02
Frequently asked questions
- What is Alexander Mast's NPI number?
- Alexander Mast's National Provider Identifier (NPI) is 1679920755, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Mast's specialty?
- Alexander Mast is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Mast located?
- Alexander Mast's practice location on file with NPPES is 1010 Hager St, Saint Marys, OH 45885-2421.
- What is Alexander Mast's phone number?
- The practice phone number listed in the NPPES registry for Alexander Mast is (419) 394-9579.
- Does Alexander Mast accept Medicare?
- Alexander Mast is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Mast's NPI active?
- Yes — Alexander Mast's NPI (1679920755) is active in the NPPES registry as of the last update on 2023-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.