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

Dr. John William Marcum, MD

Individual provider Critical Care Medicine (Anesthesiology) Physician · NPI 1902885957

Dr. John William Marcum, MD is a Critical Care (Intensivists) in Camarillo, California. Graduated from University of Southern California Keck School of Medicine in 1999, 27 years ago. Practices with Childrens Hospital Los Angeles Medical Group Inc, a 288-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
27
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

5021 Verdugo Way
Camarillo, CA 93012-8675
Phone: (805) 338-2395
Fax: (805) 830-0321
Show map & directions

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

Specialties & licences

Critical Care Medicine (Anesthesiology) Physician (primary) Taxonomy 207LC0200X · Licence A75408 (CA)

Record details

NPI number1902885957
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 10, 2006
Last updated in NPPESMarch 19, 2015

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesPEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Childrens Hospital Los Angeles Medical Group Inc — 288 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount