Dr. Gregory L. Marusak, MD
- Medicare services, 2023
- 23
- Medicare patients, 2024
- 12
- Part D claims, 2018
- 14
- MIPS score, 2024
- 88
- Affiliated sites
- 1
- Practice address
- 150 Ucla Medical Plz, Los Angeles, CA 90024
- Practice phone
- Call (310) 267-9308
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Resnick Neuropsychiatric Hospital at UCLA
Los Angeles, California
Find Dr. Marusak's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory L. Marusak is a psychiatrist in Los Angeles, California
Dr. Marusak practices at Resnick Neuropsychiatric Hospital at UCLA in Los Angeles, California.
Dr. Marusak's NPI, 1205851532, was assigned on July 13, 2006. Dr. Marusak graduated from Wayne State University School Of Medicine in 1990. Dr. Marusak holds California license G72110.
- NPI
- 1205851532NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961640925
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 267-9308
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory L. Marusak practices at Resnick Neuropsychiatric Hospital at UCLA in Los Angeles, California
Dr. Marusak's primary practice is Resnick Neuropsychiatric Hospital at UCLA, at 150 Ucla Medical Plz, Los Angeles, CA 90024 in Los Angeles County. The practice phone is (310) 267-9308.
- Resnick Neuropsychiatric Hospital at UCLA150 Ucla Medical Plz, Los Angeles, CA 90024 · Los Angeles CountyPhone(310) 267-9308
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory L. Marusak is affiliated with 2 sites of care and 1 medical group
Dr. Marusak's primary practice is Resnick Neuropsychiatric Hospital at UCLA in Los Angeles, California. The medical group on file is UCLA Health. Dmand AI also links Dr. Marusak to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory L. Marusak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marusak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Resnick Neuropsychiatric Hospital at UCLA | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory L. Marusak is one of 6,803 psychiatrists in California
Psychiatry is Dr. Marusak's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Marusak is licensed in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Clinical focus
Dmand AI lists bipolar disorder, depression and schizophrenia among the conditions Dr. Marusak treats.
Psychiatrists near Dr. Marusak
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory L. Marusak billed Medicare for 23 services in 2023
CMS data shows 23 Medicare services from Dr. Marusak across 1 procedure code in 2023, all of them office visits, for 12 Medicare patients. Medicare paid $2,374 for them. Every service was in an office.
Dr. Marusak's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 282023: 2318%
Dr. Marusak compared with the California median for psychiatrists, 2023
- Dr. Marusak
- California median
- Medicare services
- 23vs 11981% below
- Medicare patients
- 12vs 4171% below
- Part D claims
- 14vs 14490% below
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Marusak's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marusak and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory L. Marusak treated 12 Medicare patients in 2024, average age 53
CMS counts 12 Medicare patients who saw Dr. Marusak in 2024. The largest group is 75 to 84, with 0 patients. 75% of them have depression, and 75% have mood disorders. Their average risk score is 1.36, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marusak's median patient age at 43, with 53% women.
Dr. Marusak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Marusak's Medicare patients, 2024
- Depression75%
- Mood disorders75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marusak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory L. Marusak wrote 14 Medicare Part D claims in 2018
In 2018, Dr. Marusak wrote 14 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $238 in total drug cost. In 2017, CMS named 100 claims across 4 drugs.
Dr. Marusak's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 1002018: 1486%
Drugs named by CMS: 1 in 2018, 4 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Gregory L. Marusak scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Marusak for performance year 2024, reported as part of a group. Dr. Marusak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marusak as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Marusak's MIPS scores, performance year 2024
- 88of 100Final score
- 76of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 56of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory L. Marusak graduated from Wayne State University School Of Medicine
Dr. Marusak graduated from Wayne State University School Of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Gregory L. Marusak accepts plans from 7 insurance carriers
Dr. Marusak is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- United Healthcare
Plan types Dr. Marusak accepts, by number of carriers
- Medicare7
- PPO5
- HMO2
- POS2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory L. Marusak's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory L. Marusak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory L. Marusak's NPI number?
Dr. Gregory L. Marusak's NPI number is 1205851532. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory L. Marusak?
Dr. Gregory L. Marusak is a psychiatrist in Los Angeles, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Gregory L. Marusak practice?
Dr. Marusak practices at 150 Ucla Medical Plz, Los Angeles, CA 90024. Dr. Marusak's primary practice is Resnick Neuropsychiatric Hospital at UCLA in Los Angeles, California. Dmand AI also links Dr. Marusak to 1 group practice or clinic.
What is Dr. Gregory L. Marusak's office phone number?
The practice phone on file for Dr. Marusak is (310) 267-9308.
What is Dr. Gregory L. Marusak's medical license number?
Dr. Marusak holds California license G72110.
What medical group is Dr. Gregory L. Marusak part of?
Dr. Marusak is linked to UCLA Health.
Does Dr. Gregory L. Marusak accept Medicare?
Yes. CMS data shows Dr. Marusak billed Medicare for 23 services in 2023, and Dr. Marusak accepts Medicare assignment.
Does Dr. Gregory L. Marusak offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marusak as offering telehealth services.
What is Dr. Gregory L. Marusak's MIPS score?
Dr. Marusak's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory L. Marusak see?
CMS counts 12 Medicare patients who saw Dr. Marusak in 2024, with an average age of 53.
Show 5 more questionsShow fewer questions
What services does Dr. Gregory L. Marusak bill to Medicare?
In 2023, Dr. Marusak's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Gregory L. Marusak go to medical school?
Dr. Marusak graduated from Wayne State University School Of Medicine in 1990.
What drugs does Dr. Gregory L. Marusak prescribe most?
In 2018 Medicare Part D data, Dr. Marusak's most prescribed drugs by claims were Lamotrigine.
How long has Dr. Gregory L. Marusak been practicing?
Dr. Marusak graduated from medical school in 1990, 36 years ago.
What insurance does Dr. Gregory L. Marusak accept?
Dr. Marusak is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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