Douglas Phan, M.D.
NPI 1366671992 · Psychiatry Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Phan, M.D. is a Psychiatry Physician provider in Riverside, CA (NPI 1366671992).
Provider details
- NPI number
- 1366671992
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A114481 (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
16 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 69 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 730 | 110 |
| Olanzapine | 651 | 67 |
| Quetiapine Fumarate | 607 | 63 |
| Risperidone | 580 | 68 |
| Benztropine Mesylate | 505 | 62 |
| Sertraline Hcl | 353 | 41 |
| Escitalopram Oxalate | 340 | 49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-02
- Last updated
- 2016-10-20
Frequently asked questions
- What is Douglas Phan's NPI number?
- Douglas Phan's National Provider Identifier (NPI) is 1366671992, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Phan's specialty?
- Douglas Phan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Phan located?
- Douglas Phan's practice location on file with NPPES is 769 W Blaine St, Riverside, CA 92507-3970.
- What is Douglas Phan's phone number?
- The practice phone number listed in the NPPES registry for Douglas Phan is (951) 358-4705.
- Does Douglas Phan accept Medicare?
- Douglas Phan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Phan's NPI active?
- Yes — Douglas Phan's NPI (1366671992) is active in the NPPES registry as of the last update on 2016-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.