Derek Truong Phan MD Inc
NPI 1598091837 · Internal Medicine Physician · Westminster, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derek Truong Phan MD Inc is a Internal Medicine Physician organization in Westminster, CA (NPI 1598091837).
Provider details
- NPI number
- 1598091837
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Derek Phan, Owner(714) 383-1661
- License
- A99908 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-10-21
- Last updated
- 2009-10-21
Frequently asked questions
- What is Derek Truong Phan MD Inc's NPI number?
- Derek Truong Phan MD Inc's National Provider Identifier (NPI) is 1598091837, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Derek Truong Phan MD Inc?
- Derek Truong Phan MD Inc is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Derek Truong Phan MD Inc located?
- Derek Truong Phan MD Inc's practice location on file with NPPES is 9191 Bolsa Ave, Westminster, CA 92683-5564.
- What is Derek Truong Phan MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Derek Truong Phan MD Inc is (714) 891-7035.
- Does Derek Truong Phan MD Inc accept Medicare?
- Derek Truong Phan MD Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Derek Truong Phan MD Inc?
- The authorized official listed on Derek Truong Phan MD Inc's NPPES record is Derek Phan, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Derek Truong Phan MD Inc's NPI active?
- Yes — Derek Truong Phan MD Inc's NPI (1598091837) is active in the NPPES registry as of the last update on 2009-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.