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

Dr. Brian Nicholas Mason, DO

Individual provider Family Medicine Physician · NPI 1942889217

Dr. Brian Nicholas Mason, DO is a Family Practice in Santa Monica, California. Qualified in 2020, 6 years ago. Practices with Hospitalist Group of Montebello Inc, a 56-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2021
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1245 16th St Ste 125
Santa Monica, CA 90404-1240
Phone: (310) 315-8900
Fax: (310) 315-8902
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 20A23853 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 20A23853 (CA)

Record details

NPI number1942889217
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 5, 2021
Last updated in NPPESJune 2, 2026
Certification dateJune 2, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Hospitalist Group Of Montebello Inc — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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