Thomas Callan, M. D.
NPI 1699911487 · Hematology & Oncology Physician · El Cajon, CA
Thomas Callan, M. D. is a Hematology & Oncology Physician provider in El Cajon, CA (NPI 1699911487).
Provider details
- NPI number
- 1699911487
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- GFE26074 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-12-28
- Last updated
- 2023-03-07
Frequently asked questions
- What is Thomas Callan's NPI number?
- Thomas Callan's National Provider Identifier (NPI) is 1699911487, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Callan's specialty?
- Thomas Callan is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Callan located?
- Thomas Callan's practice location on file with NPPES is 230 Cajon View Dr, El Cajon, CA 92020-7502.
- What is Thomas Callan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Callan is (619) 440-4421.
- Is Thomas Callan's NPI active?
- Yes — Thomas Callan's NPI (1699911487) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.