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

Mr. Stephen W Marer, MD

Individual provider Internal Medicine Physician · NPI 1043281322

Mr. Stephen W Marer, MD practises Internal Medicine in Los Angeles, California. Graduated from University of California, Davis School of Medicine in 1994, 32 years ago. Practices with Providence Medical Institute, a 336-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
32
Trained at
University of California, Davis School of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1520 San Pablo St Ste 1000
Los Angeles, CA 90033-5312
Phone: (323) 442-5100
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 3400 Lomita Blvd, Torrance, CA 90505 — (310) 326-5648

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence A55306 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A55306 (CA)

Record details

NPI number1043281322
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 27, 2006
Last updated in NPPESNovember 3, 2022
Certification dateNovember 3, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesINFECTIOUS DISEASE
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice Providence Medical Institute — 336 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients277
Services billed 821 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Colleagues at Providence Medical Institute

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 336 clinicians in the practice; 12 are shown here.

Other providers in Los Angeles