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Gregory Hong, D.D.S.
NPI 1912051905 · General Practice Dentistry · Castro Valley, CA
Gregory Hong, D.D.S. is a General Practice Dentistry provider in Castro Valley, CA (NPI 1912051905).
Provider details
- NPI number
- 1912051905
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 034496 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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.
Practice location
20353 Lake Chabot Rd
Castro Valley, CA 94546-5392
Phone: (510) 581-2102
Fax: (510) 581-2321
Street-level locationGet directions
Mailing address
166 Castle Crest Rd
Alamo, CA 94507-2671
Registry dates
- Enumerated
- 2007-01-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gregory Hong's NPI number?
- Gregory Hong's National Provider Identifier (NPI) is 1912051905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hong's specialty?
- Gregory Hong is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Gregory Hong located?
- Gregory Hong's practice location on file with NPPES is 20353 Lake Chabot Rd, Castro Valley, CA 94546-5392.
- What is Gregory Hong's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hong is (510) 581-2102.
- Is Gregory Hong's NPI active?
- Yes — Gregory Hong's NPI (1912051905) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.