What is Craig Leong's NPI number?

Craig Leong's National Provider Identifier (NPI) is 1639103344, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Craig Leong's specialty?

Craig Leong is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).

Where is Craig Leong located?

Craig Leong's practice location on file with NPPES is 365 Lennon Ln Ste 250, Walnut Creek, CA 94598-5915.

What is Craig Leong's phone number?

The practice phone number listed in the NPPES registry for Craig Leong is (925) 943-6800.

Is Craig Leong's NPI active?

Yes — Craig Leong's NPI (1639103344) is active in the NPPES registry as of the last update on 2021-04-29.

IndividualActive

Craig Leong, M.D.

NPI 1639103344 · Retina Specialist (Ophthalmology) Physician · Walnut Creek, CA

Craig Leong, M.D. is a Retina Specialist (Ophthalmology) Physician provider in Walnut Creek, CA (NPI 1639103344).

Provider details

NPI number: 1639103344
Entity type: Individual
Primary specialty: Retina Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: G28041 (CA)

Specialties & taxonomies

Retina Specialist (Ophthalmology) PhysicianPrimary207WX0107XLicense G28041 (CA)
Allopathic & Osteopathic Physicians
Ophthalmology Physician207W00000XLicense G28041 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(100/100 index)

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

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
3 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

365 Lennon Ln Ste 250

Walnut Creek, CA 94598-5915

Phone: (925) 943-6800

Fax: (925) 943-6880

Street-level locationGet directions

More CA providers

Mailing address

365 Lennon Ln Ste 250

Walnut Creek, CA 94598-5915

Additional practice locations (2)

20130 Lake Chabot Rd Ste 303
Castro Valley, CA 94546-5340
Phone: (510) 733-1888
Fax: (510) 881-5332
5980 Stoneridge Dr Ste 117
Pleasanton, CA 94588-2723
Phone: (925) 463-8200
Fax: (925) 463-8201

Enumerated: 2006-07-10
Last updated: 2021-04-29
Certified: 2021-04-29

Frequently asked questions

What is Craig Leong's NPI number?: Craig Leong's National Provider Identifier (NPI) is 1639103344, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Craig Leong's specialty?: Craig Leong is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
Where is Craig Leong located?: Craig Leong's practice location on file with NPPES is 365 Lennon Ln Ste 250, Walnut Creek, CA 94598-5915.
What is Craig Leong's phone number?: The practice phone number listed in the NPPES registry for Craig Leong is (925) 943-6800.
Is Craig Leong's NPI active?: Yes — Craig Leong's NPI (1639103344) is active in the NPPES registry as of the last update on 2021-04-29.

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