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

Marek Mateusz Kowalski

Individual provider Internal Medicine Physician · NPI 1720665409

Marek Mateusz Kowalski is a Hospitalist in Santa Monica, California. Graduated from Boston University School of Medicine in 2021, 5 years ago. Practices as a sole proprietor and works from 2 locations. Licensed in California.

Years since qualifying
5
Trained at
Boston University School of Medicine
Licensed in
CA
In the registry since
2021
Specialties on file
2
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Practice location Address checks out

1250 16th St # C2304
Santa Monica, CA 90404-1249
Phone: (310) 319-4698
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 757 Westwood Plaza, Los Angeles, CA 90095-7419 — (310) 825-7375

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence A186720 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A186720 (CA)

Record details

NPI number1720665409
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedMarch 27, 2021
Last updated in NPPESJuly 2, 2024
Certification dateJuly 2, 2024

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2021 (5 years in practice)
Accepts Medicare assignment Not indicated
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 patients28
Services billed 29 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Other providers in Santa Monica