Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark D Gretsinger, MD

Individual provider Gastroenterology Physician · NPI 1407843758

Mark D Gretsinger, MD is a Gastroenterology Physician in Toledo, Ohio. Licensed in Ohio. Registered with an NPI since 2005.

Licensed in
OH
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3439 Granite Cir
Toledo, OH 43617-1161
Phone: (419) 843-7996
Fax: (419) 841-7725
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 35051729G (OH)

Record details

NPI number1407843758
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 3, 2005
Last updated in NPPESApril 30, 2012
Mailing address3439 Granite Cir, Toledo, OH 43617-1161

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