What is Gerard Leong's NPI number?

Gerard Leong's National Provider Identifier (NPI) is 1215346697, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gerard Leong's specialty?

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

Where is Gerard Leong located?

Gerard Leong's practice location on file with NPPES is 1333 N Mountain Ave, Ontario, CA 91762-1105.

What is Gerard Leong's phone number?

The practice phone number listed in the NPPES registry for Gerard Leong is (909) 321-3172.

Is Gerard Leong's NPI active?

Yes — Gerard Leong's NPI (1215346697) is active in the NPPES registry as of the last update on 2014-08-11.

IndividualActive

Gerard Leong, PHARM.D.

NPI 1215346697 · Pharmacist · Ontario, CA

Gerard Leong, PHARM.D. is a Pharmacist provider in Ontario, CA (NPI 1215346697).

Provider details

NPI number: 1215346697
Entity type: Individual
Primary specialty: PharmacistPharmacy Service Providers
Credential: PHARM.D.
Sex: Male
Sole proprietor: No
License: 41116 (CA)

Practice location

1333 N Mountain Ave

Ontario, CA 91762-1105

Phone: (909) 321-3172

Street-level locationGet directions

More CA providers

Mailing address

1333 N Mountain Ave

Ontario, CA 91762-1105

Specialties & taxonomies

PharmacistPrimary183500000XLicense 41116 (CA)
Pharmacy Service Providers

Profile Score

Detailed profile(76/100 index)

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

Registry tenure38% of score
12 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.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.

Drug	Part D claims (2024)
Naloxone Hcl	11

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Enumerated: 2014-08-11
Last updated: 2014-08-11

Frequently asked questions

What is Gerard Leong's NPI number?: Gerard Leong's National Provider Identifier (NPI) is 1215346697, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Gerard Leong's specialty?: Gerard Leong is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).
Where is Gerard Leong located?: Gerard Leong's practice location on file with NPPES is 1333 N Mountain Ave, Ontario, CA 91762-1105.
What is Gerard Leong's phone number?: The practice phone number listed in the NPPES registry for Gerard Leong is (909) 321-3172.
Is Gerard Leong's NPI active?: Yes — Gerard Leong's NPI (1215346697) is active in the NPPES registry as of the last update on 2014-08-11.

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

Profile Score

What this provider prescribes (Medicare Part D)

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Frequently asked questions