IndividualActive
Diem Phan, BS
NPI 1104955939 · Mental Health Counselor · Rosemead, CA
Diem Phan, BS is a Mental Health Counselor provider in Rosemead, CA (NPI 1104955939).
Provider details
- NPI number
- 1104955939
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- BS
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
83% 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
9353 Valley Blvd
Rosemead, CA 91770-1934
Phone: (626) 287-2988
Street-level locationGet directions
Mailing address
1957 Gemini St
West Covina, CA 91792-2307
Registry dates
- Enumerated
- 2007-03-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diem Phan's NPI number?
- Diem Phan's National Provider Identifier (NPI) is 1104955939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diem Phan's specialty?
- Diem Phan is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Diem Phan located?
- Diem Phan's practice location on file with NPPES is 9353 Valley Blvd, Rosemead, CA 91770-1934.
- What is Diem Phan's phone number?
- The practice phone number listed in the NPPES registry for Diem Phan is (626) 287-2988.
- Is Diem Phan's NPI active?
- Yes — Diem Phan's NPI (1104955939) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.