Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Derek William Altema

Individual provider Emergency Medicine Physician · NPI 1023663671

Derek William Altema practises Emergency Medicine in Los Angeles, California. Graduated from Howard University College of Medicine in 2020, 6 years ago. Practices with Regents of the University of California, a 68-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
6
Trained at
Howard University College of Medicine
Licensed in
CA, IL
In the registry since
2019
Specialties on file
3
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Practice location Address checks out

757 Westwood Plz Ste 1517
Los Angeles, CA 90095-3132
Phone: (310) 825-9111
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 450 Broadway St # Mc6342, Redwood City, CA 94063-3132 — (650) 721-1446
  • 5841 S Maryland Ave # Mc5068, Chicago, IL 60637-1443 — (773) 702-3820
  • 1830 E Monument St Ste 6-100, Baltimore, MD 21287-0020 — (443) 812-3628

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A186940 (CA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 125.076264 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1023663671
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedAugust 9, 2019
Last updated in NPPESAugust 30, 2024
Certification dateAugust 30, 2024

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolHOWARD UNIVERSITY COLLEGE OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice Regents Of The University Of California — 68 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients135
Services billed 160 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Regents of the University of California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 68 clinicians in the practice; 12 are shown here.

Other providers in Los Angeles