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DR. THOMAS WILLIAM CALLAN I M. D.
NPI 1699911487
Internal Medicine - Hematology & Oncology in El Cajon, CA

Active since December 28, 2008
230 CAJON VIEW DR, EL CAJON, CA 92020(619) 440-4421(619) 593-2120 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: September 20, 2026.

About Dr. Thomas William Callan I M. D. NPPES

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

DR. THOMAS WILLIAM CALLAN I M. D. (NPI 1699911487) is an individual hematology & oncology provider in El Cajon, California, licensed in California (GFE26074) and active in the NPI registry since December 2008.

NPPES Registry Identity

NPI1699911487
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. THOMAS WILLIAM CALLAN ICredential: M. D.
Location Address230 CAJON VIEW DREl Cajon, CA 92020-7502
Mailing AddressPo Box 904El Cajon, CA 92022-0904 · (619) 440-4421 · Fax (619) 593-2120
Phone(619) 440-4421
Fax(619) 593-2120
Sole ProprietorYes
Enumeration DateDecember 28, 2008
Last NPPES UpdateMarch 7, 2023
✔ NPI 1699911487 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · GFE26074
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
230 CAJON VIEW DR, El Cajon, CA 92020
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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 Thomas Callan's NPI number?

The NPI number for Thomas Callan is 1699911487. It was assigned to this individual provider in the NPPES registry on December 28, 2008.

Where is Thomas Callan located?

Thomas Callan practices at 230 Cajon View Dr, El Cajon, CA 92020. The listed phone number is (619) 440-4421.

What is Thomas Callan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Thomas Callan was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.