Brian Mason, DO
NPI 1942889217 · Family Medicine Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Mason, DO is a Family Medicine Physician provider in Santa Monica, CA (NPI 1942889217).
Provider details
- NPI number
- 1942889217
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A23853 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
245 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 208 | $159 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 26 | $73 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $75 |
Typical Medicare-allowed amounts for these services range $73–$159 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 83 | 30 |
| Metformin Hclbrand: Metformin Hcl Er | 32 | — |
| Gabapentin | 31 | — |
| Lisinopril | 27 | 11 |
| Omeprazole | 26 | — |
| Losartan Potassium | 25 | 13 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-05
- Last updated
- 2026-06-02
- Certified
- 2026-06-02
Frequently asked questions
- What is Brian Mason's NPI number?
- Brian Mason's National Provider Identifier (NPI) is 1942889217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Mason's specialty?
- Brian Mason is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Mason located?
- Brian Mason's practice location on file with NPPES is 1245 16th St Ste 125, Santa Monica, CA 90404-1240.
- What is Brian Mason's phone number?
- The practice phone number listed in the NPPES registry for Brian Mason is (310) 315-8900.
- Does Brian Mason accept Medicare?
- Brian Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Mason's NPI active?
- Yes — Brian Mason's NPI (1942889217) is active in the NPPES registry as of the last update on 2026-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.