Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MARY F. CALLAHAN M.D.
NPI 1275508194
Family Medicine in State College, PA

Active since February 22, 2006
2520 GREEN TECH DR, STE D, STATE COLLEGE, PA 16803(814) 234-5021(814) 235-3313 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Mary F. Callahan M.d. NPPES

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

DR. MARY F. CALLAHAN M.D. (NPI 1275508194) is an individual family medicine provider in State College, Pennsylvania, licensed in Pennsylvania (MD037354E) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1275508194
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MARY F. CALLAHANCredential: M.D.
Location Address2520 GREEN TECH DR, STE DState College, PA 16803-2300
Mailing Address100 N Academy AveDanville, PA 17822-3034 · (570) 271-6144 · Fax (570) 271-6578
Fax(814) 235-3313
Sole ProprietorNo
Enumeration DateFebruary 22, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1275508194 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License Licensed in PA · MD037354E
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
2520 GREEN TECH DR, State College, PA 16803

Other Providers at the Same Location NPPES 13

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

Internal Medicine (Rheumatology)
2520 GREEN TECH DR
STATE COLLEGE, PA 16803
Family Medicine
2520 GREEN TECH DR, SUITE C
STATE COLLEGE, PA 16803
Pediatrics (Pediatric Critical Care Medicine)
2520 GREEN TECH DR, STE D
STATE COLLEGE, PA 16803
Family Medicine
2520 GREEN TECH DR, SUITE C
STATE COLLEGE, PA 16803
Nurse Practitioner
2520 GREEN TECH DR
STATE COLLEGE, PA 16803
Nurse Practitioner
2520 GREEN TECH DR, STE D
STATE COLLEGE, PA 16803
Nurse Practitioner
2520 GREEN TECH DR, STE D
STATE COLLEGE, PA 16803
Family Medicine
2520 GREEN TECH DR, STE D
STATE COLLEGE, PA 16803

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 Mary Callahan's NPI number?

The NPI number for Mary Callahan is 1275508194. It was assigned to this individual provider in the NPPES registry on February 22, 2006.

Where is Mary Callahan located?

Mary Callahan practices at 2520 Green Tech Dr Ste D, State College, PA 16803. The listed phone number is (814) 234-5021.

What is Mary Callahan's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for Mary Callahan was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.