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Mark Gretsinger, M.D.
NPI 1407843758 · Gastroenterology Physician · Toledo, OH
Mark Gretsinger, M.D. is a Gastroenterology Physician provider in Toledo, OH (NPI 1407843758).
Provider details
- NPI number
- 1407843758
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35051729G (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
3439 Granite Cir
Toledo, OH 43617-1161
Phone: (419) 843-7996
Fax: (419) 841-7725
Street-level locationGet directions
Mailing address
3439 Granite Cir
Toledo, OH 43617-1161
Registry dates
- Enumerated
- 2005-10-03
- Last updated
- 2012-04-30
Frequently asked questions
- What is Mark Gretsinger's NPI number?
- Mark Gretsinger's National Provider Identifier (NPI) is 1407843758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gretsinger's specialty?
- Mark Gretsinger is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gretsinger located?
- Mark Gretsinger's practice location on file with NPPES is 3439 Granite Cir, Toledo, OH 43617-1161.
- What is Mark Gretsinger's phone number?
- The practice phone number listed in the NPPES registry for Mark Gretsinger is (419) 843-7996.
- Is Mark Gretsinger's NPI active?
- Yes — Mark Gretsinger's NPI (1407843758) is active in the NPPES registry as of the last update on 2012-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.