Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Olen Jack Haseman, MD

Individual provider Internal Medicine Physician · NPI 1952091381

Olen Jack Haseman, MD is an Internal Medicine in Loma Linda, California. Qualified in 2023, 3 years ago. Licensed in California.

Years since qualifying
3
Licensed in
CA
In the registry since
2023
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11234 Anderson St
Loma Linda, CA 92354-2804
Phone: (909) 558-4074
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A205395 (CA)

Record details

NPI number1952091381
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 9, 2023
Last updated in NPPESJuly 1, 2026
Certification dateJuly 1, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

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