Gregory Marusak, MD
Psychiatry Physician · Los Angeles, CA
Gregory Marusak, MD is a psychiatry physician with a practice address in Los Angeles, California, and NPI 1205851532, issued on Jul 13, 2006. Check the license (California G72110, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Marusak
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G72110 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Medical Plz, Los Angeles, CA 90095
- Phone
- (310) 825-9989
- Enumerated
- Jul 13, 2006
- Record last updated
- Jul 25, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid IDs
- 1205851532 CA
00G721100 CA - Medicare enrollment
- Enrolled (PECOS I20130603000434); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 300 Medical Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Natalie Ayars, MDPsychiatry Physician1285665364
- Carrie Bearden, PH.DClinical Psychologist1194750919
Verify Gregory Marusak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72110Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 91.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- UC RegentsLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Marusak among 8,673 psychiatry physician records in California
Gregory Marusak, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1990 · median 2005 among the 3,295 with a school on file
- Record last updated2013 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
987 psychiatry physician records list a practice address in Los Angeles
They are 987 of the 69,537 NPPES records with a practice address in Los Angeles, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Los Angeles → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Natalie Ayars, MDLos Angeles, CA 900951285665364
- Laurie Casaus, MDLos Angeles, CA 900951093755449
- Philip Cogen, M.D.Los Angeles, CA 900951831130426
- Melita Daley, MDLos Angeles, CA 900951982635058
- Michael Enenbach, MDLos Angeles, CA 900951477583953
- Stephanny Freeman, PHDLos Angeles, CA 900951891732194
- Helen Lavretsky, M.D.Los Angeles, CA 900951881627404
- Patricia Lester, MDLos Angeles, CA 900951760415277
Common questions
What is Gregory Marusak, MD's NPI number?
Gregory Marusak, MD's National Provider Identifier (NPI) is 1205851532, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Marusak, MD located?
The NPPES record lists a practice address at 300 Medical Plz, Los Angeles, CA, 90095. Phone: (310) 825-9989. Providers update this record themselves, so call before visiting.
How can I verify Gregory Marusak, MD's license?
NPPES lists California license number G72110, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Gregory Marusak, MD's MIPS final score?
The 2023 MIPS final score is 91.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.