Tammie Chen
NPI 1851628580 · Counselor · Oakland, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammie Chen is a Counselor provider in Oakland, CA (NPI 1851628580).
Provider details
- NPI number
- 1851628580
- Entity type
- Individual
- Primary specialty
- CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
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
Mailing address
Registry dates
- Enumerated
- 2009-11-18
- Last updated
- 2014-08-07
Frequently asked questions
- What is Tammie Chen's NPI number?
- Tammie Chen's National Provider Identifier (NPI) is 1851628580, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammie Chen's specialty?
- Tammie Chen is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).
- Where is Tammie Chen located?
- Tammie Chen's practice location on file with NPPES is 268 Grand Ave, Oakland, CA 94610-4724.
- What is Tammie Chen's phone number?
- The practice phone number listed in the NPPES registry for Tammie Chen is (510) 835-2777.
- Does Tammie Chen accept Medicare?
- Tammie Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammie Chen's NPI active?
- Yes — Tammie Chen's NPI (1851628580) is active in the NPPES registry as of the last update on 2014-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.