Gregory Marusak, MD
NPI 1205851532 · Psychiatry Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Marusak, MD is a Psychiatry Physician provider in Los Angeles, CA (NPI 1205851532).
Provider details
- NPI number
- 1205851532
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G72110 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-13
- Last updated
- 2013-07-25
Frequently asked questions
- What is Gregory Marusak's NPI number?
- Gregory Marusak's National Provider Identifier (NPI) is 1205851532, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Marusak's specialty?
- Gregory Marusak is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Marusak located?
- Gregory Marusak's practice location on file with NPPES is 300 Medical Plz, Los Angeles, CA 90095-0001.
- What is Gregory Marusak's phone number?
- The practice phone number listed in the NPPES registry for Gregory Marusak is (310) 825-9989.
- Does Gregory Marusak accept Medicare?
- Gregory Marusak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Marusak's NPI active?
- Yes — Gregory Marusak's NPI (1205851532) is active in the NPPES registry as of the last update on 2013-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.