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WILLIAM THOMAS CALLAHAN MD
NPI 1356344535
Specialist in Gainesville, GA

Active since May 23, 2005
663 LANIER PARK DR, GAINESVILLE, GA 30501(770) 536-8109(770) 536-3203 Get Directions Write a Review

NPPES record last updated: May 29, 2008. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William Thomas Callahan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM THOMAS CALLAHAN MD (NPI 1356344535) is an individual specialist in Gainesville, Georgia, licensed in Georgia (14469) and active in the NPI registry since May 2005.

NPPES Registry Identity

NPI1356344535
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameWILLIAM THOMAS CALLAHANCredential: MD
Location Address663 LANIER PARK DRGainesville, GA 30501
Mailing Address663 Lanier Park DrGainesville, GA 30501-2059 · (770) 536-8109 · Fax (770) 536-3203
Phone(770) 536-8109
Fax(770) 536-3203
Sole ProprietorNo
Enumeration DateMay 23, 2005
Last NPPES UpdateMay 29, 2008
✔ NPI 1356344535 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in GA · 14469
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
663 LANIER PARK DR, Gainesville, GA 30501
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Other Identifiers 3

Medicaid00162126AGA
Medicare PIN10BDHMB
Medicare UPINE72829GA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. VIKRAMJEET M KAKADE MD
Internal Medicine (Nephrology)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
FOLATOMI AGBE-DAVIES M.D.
Internal Medicine (Nephrology)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 904-4742
MONTISH SINGLA M.D.
Internal Medicine (Nephrology)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
HEE JIN CAYETANO PA-C, RD, LD
Physician Assistant (Medical)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
DR. ADEBOWALE OGUNSEYE OGUNTOLA MD
Internal Medicine (Nephrology)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
AMANDA MARIE AGUIRRE-JOHNSON
Physician Assistant (Medical)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
MARLENE A ANDERSON-REID ANP-C
Nurse Practitioner (Adult Health)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202
JOANNA B HOLDER PA-C
Physician Assistant (Medical)
663 LANIER PARK DR
GAINESVILLE, GA 30501
Hall County (678) 450-0202

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Callahan's NPI number?

The NPI number for William Callahan is 1356344535. It was assigned to this individual provider in the NPPES registry on May 23, 2005.

Where is William Callahan located?

William Callahan practices at 663 Lanier Park Dr, Gainesville, GA 30501. The listed phone number is (770) 536-8109.

What is William Callahan's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for William Callahan was last updated on May 29, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.