Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Ralph Callihan, MD

Anatomic Pathology Physician in Germantown, TN · enumerated 2006.

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

National Provider Identifier

1700810264

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Registry record

Entity type Individual (Type 1)

Name Thomas Ralph Callihan

Credential MD

Sex Male

Practice address 7550 Wolf River Blvd, Suite 200, Germantown, TN, 38138

Phone (901) 542-6801

Fax (901) 542-6871

Enumeration date Jul 10, 2006

Last updated in NPPES Dec 9, 2008

Taxonomy & licenses

207ZP0101X Anatomic Pathology Physician Allopathic & Osteopathic Physicians · License MD0000012403 (TN) 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
202438179	Medicaid	MO	-
3031624	Other	TN	BLUE CROSS BLUE SHIELD
3031624	Medicaid	TN	-
113804001	Medicaid	AR	-
0010000	Medicaid	MS	-
82573	Other	AR	BLUE CROSS
000000005314	Other	TN	MEMPHIS MANAGED CARE
3040704	Medicaid	TN	-

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.

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Frequently asked questions

What is the NPI number for Thomas Callihan?

The National Provider Identifier (NPI) for Thomas Callihan is 1700810264, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Callihan practice?

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

Other providers at this practice address

Browse all →

Heather Baldwin Anatomic Pathology & Clinical Pathology Physician · Germantown, TN NPI 1235124363 Trumbull Laboratories, LLC Clinical Medical Laboratory · Germantown, TN NPI 1063449320 Pathology Group of the Midsouth PC Anatomic Pathology Physician · Germantown, TN NPI 1538199732 Kenneth Groshart Anatomic Pathology Physician · Germantown, TN NPI 1730119819 Huiwen Xie Anatomic Pathology Physician · Germantown, TN NPI 1760412662 Carolyn Chesney Hematology (Pathology) Physician · Germantown, TN NPI 1720012297 Thomas Chesney Anatomic Pathology Physician · Germantown, TN NPI 1699709162 Johnnie Hall Anatomic Pathology Physician · Germantown, TN NPI 1205860673

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-12-09.