Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sean Patrick Callahan, M.D.

Family Medicine Physician in Oak Harbor, OH · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1194811828

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Sean Patrick Callahan

Credential M.D.

Sex Male

Practice address 11697 W State Route 163, Oak Harbor, OH, 43449

Phone (419) 898-0993

Fax (419) 898-2444

Enumeration date Oct 4, 2006

Last updated in NPPES Oct 6, 2020

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 35-07-4846 (OH) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
2084784	Medicaid	OH	-
174384	Other	OH	ANTHEM BCBS OF OHIO

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Sean Callahan?

The National Provider Identifier (NPI) for Sean Callahan is 1194811828, a Type 1 (individual) record in the CMS NPPES registry.

Where does Sean Callahan practice?

The practice location on file with NPPES is in Oak Harbor, OH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Chad Blunt Family Medicine Physician · Oak Harbor, OH NPI 1447345301

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-06.