What is Bob Chien's NPI number?

Bob Chien's National Provider Identifier (NPI) is 1851763221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Bob Chien's specialty?

Bob Chien is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).

Where is Bob Chien located?

Bob Chien's practice location on file with NPPES is 12254 Bellflower Blvd, Downey, CA 90242-2804.

What is Bob Chien's phone number?

The practice phone number listed in the NPPES registry for Bob Chien is (562) 385-0556.

Is Bob Chien's NPI active?

Yes — Bob Chien's NPI (1851763221) is active in the NPPES registry as of the last update on 2020-07-09.

IndividualActive

Bob Chien, PHARM.D.

NPI 1851763221 · Pharmacist · Downey, CA

Bob Chien, PHARM.D. is a Pharmacist provider in Downey, CA (NPI 1851763221).

Provider details

NPI number: 1851763221
Entity type: Individual
Primary specialty: PharmacistPharmacy Service Providers
Credential: PHARM.D.
Sex: Male
Sole proprietor: Yes
License: 61058 (CA)

Specialties & taxonomies

PharmacistPrimary183500000XLicense 61058 (CA)
Pharmacy Service Providers

Profile Score

Detailed profile(77/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
10 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
2 documented practice locations

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

12254 Bellflower Blvd

Downey, CA 90242-2804

Phone: (562) 385-0556

Street-level locationGet directions

More CA providers

Mailing address

23 Edmonton Pl

Aliso Viejo, CA 92656-6209

Additional practice locations (1)

5385 Alton Pkwy
Irvine, CA 92604-8609
Phone: (949) 733-8226

Enumerated: 2015-10-26
Last updated: 2020-07-09
Certified: 2020-07-09

Frequently asked questions

What is Bob Chien's NPI number?: Bob Chien's National Provider Identifier (NPI) is 1851763221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Bob Chien's specialty?: Bob Chien is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).
Where is Bob Chien located?: Bob Chien's practice location on file with NPPES is 12254 Bellflower Blvd, Downey, CA 90242-2804.
What is Bob Chien's phone number?: The practice phone number listed in the NPPES registry for Bob Chien is (562) 385-0556.
Is Bob Chien's NPI active?: Yes — Bob Chien's NPI (1851763221) is active in the NPPES registry as of the last update on 2020-07-09.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.