Marcus Pak, MD
NPI 1740819531 · Psychiatry Physician · Colton, CA
Marcus Pak, MD is a Psychiatry Physician provider in Colton, CA (NPI 1740819531).
Provider details
- NPI number
- 1740819531
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4847 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Trazodone Hcl | 31 |
| Lurasidone Hcl | 26 |
| Benztropine Mesylate | 18 |
| Gabapentin | 18 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 17 |
| Sertraline Hcl | 16 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 15 |
| Clozapine | 15 |
| Glycopyrrolate | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$43 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 8019 Compton AveLos Angeles, CA 90001-3409Phone: (323) 586-7333
Registry dates
- Enumerated
- 2020-04-03
- Last updated
- 2023-06-08
- Certified
- 2023-06-03
Frequently asked questions
- What is Marcus Pak's NPI number?
- Marcus Pak's National Provider Identifier (NPI) is 1740819531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Pak's specialty?
- Marcus Pak is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Pak located?
- Marcus Pak's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is Marcus Pak's phone number?
- The practice phone number listed in the NPPES registry for Marcus Pak is (909) 580-2186.
- Is Marcus Pak's NPI active?
- Yes — Marcus Pak's NPI (1740819531) is active in the NPPES registry as of the last update on 2023-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.