Doctor profile · Federal record
Dr. Gregory Marusak, MD
Psychiatry Physician (CMS: Psychiatry) · Los Angeles, CA
- NPI 1205851532
- Accepts Medicare
- MIPS 83.9 / 100 · 2023
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
300 Medical Plz
Los Angeles, CA 900950001
(310) 825-9989 - Mailing address
-
5767 W Century Blvd, Suite 200
Los Angeles, CA 900455632
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 25, 2013
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- California #G72110
- Medicaid (2)
- CA #1205851532 · CA #00G721100
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1205851532. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
23
Distinct HCPCS
1
Medicare allowed
$3,248
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 23 | 18 | $141 |
In context: peer comparison
Among 77 peers in Los Angeles Psychiatry Physician, average services per provider: 134. This provider delivers 0.2× the peer median.Frequently asked questions
What is Dr. Gregory Marusak's medical specialty?
Dr. Gregory Marusak practices Psychiatry Physician in Los Angeles, CA.
Where does Dr. Gregory Marusak practice?
Dr. Gregory Marusak practices at 300 Medical Plz, Los Angeles, CA 900950001. Office phone: 3108259989.
What is Dr. Gregory Marusak's NPI?
Dr. Gregory Marusak's National Provider Identifier (NPI) is 1205851532, issued by NPPES.
Does Dr. Gregory Marusak accept Medicare assignment?
Yes. Dr. Gregory Marusak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Marusak commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.