John Lok, M.D.
NPI 1992713028 · Infectious Disease Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Lok, M.D. is a Infectious Disease Physician provider in Fountain Valley, CA (NPI 1992713028).
Provider details
- NPI number
- 1992713028
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G39849 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-08-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Lok's NPI number?
- John Lok's National Provider Identifier (NPI) is 1992713028, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Lok's specialty?
- John Lok is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Lok located?
- John Lok's practice location on file with NPPES is 11160 Warner Ave, Fountain Valley, CA 92708-4008.
- What is John Lok's phone number?
- The practice phone number listed in the NPPES registry for John Lok is (714) 751-7002.
- Does John Lok accept Medicare?
- John Lok is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Lok's NPI active?
- Yes — John Lok's NPI (1992713028) 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.