What is William Si's NPI number?

William Si's National Provider Identifier (NPI) is 1285006452, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Si's specialty?

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

Where is William Si located?

William Si's practice location on file with NPPES is 1492 Highland Ave, Cheshire, CT 06410.

What is William Si's phone number?

The practice phone number listed in the NPPES registry for William Si is (203) 439-9099.

Is William Si's NPI active?

Yes — William Si's NPI (1285006452) is active in the NPPES registry as of the last update on 2019-06-02.

IndividualActive

William Si, PHARMD

NPI 1285006452 · Pharmacist · Cheshire, CT

William Si, PHARMD is a Pharmacist provider in Cheshire, CT (NPI 1285006452).

Provider details

NPI number: 1285006452
Entity type: Individual
Primary specialty: PharmacistPharmacy Service Providers
Credential: PHARMD
Sex: Male
Sole proprietor: Yes
License: PCT.0013371 (CT)

Practice location

1492 Highland Ave

Cheshire, CT 06410

Phone: (203) 439-9099

Fax: (631) 393-6922

Street-level locationGet directions

More CT providers

Mailing address

1492 Highland Ave

Cheshire, CT 06410-1287

Specialties & taxonomies

PharmacistPrimary183500000XLicense PCT.0013371 (CT)
Pharmacy Service Providers

Additional practice locations (1)

35 Gateway Ct
Cheshire, CT 06410-2239
Phone: (203) 806-0886

Profile Score

Detailed profile(78/100 index)

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

Registry tenure38% of score
11 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.

Enumerated: 2015-10-27
Last updated: 2019-06-02

Frequently asked questions

What is William Si's NPI number?: William Si's National Provider Identifier (NPI) is 1285006452, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Si's specialty?: William Si is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).
Where is William Si located?: William Si's practice location on file with NPPES is 1492 Highland Ave, Cheshire, CT 06410.
What is William Si's phone number?: The practice phone number listed in the NPPES registry for William Si is (203) 439-9099.
Is William Si's NPI active?: Yes — William Si's NPI (1285006452) is active in the NPPES registry as of the last update on 2019-06-02.

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

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (1)

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (1)

Profile Score

Frequently asked questions