John Sinclair, PHD
NPI 1124201553 · Audiologist-Hearing Aid Fitter · Northridge, CA
John Sinclair, PHD is a Audiologist-Hearing Aid Fitter provider in Northridge, CA (NPI 1124201553).
Provider details
- NPI number
- 1124201553
- Entity type
- Individual
- Primary specialty
- Audiologist-Hearing Aid FitterSpeech, Language and Hearing Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- AU670 (CA)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2007-12-07
- Last updated
- 2007-12-07
Frequently asked questions
- What is John Sinclair's NPI number?
- John Sinclair's National Provider Identifier (NPI) is 1124201553, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Sinclair's specialty?
- John Sinclair is listed in the NPPES registry with a primary specialty of Audiologist-Hearing Aid Fitter (Speech, Language and Hearing Service Providers).
- Where is John Sinclair located?
- John Sinclair's practice location on file with NPPES is 18111 Nordhoff St, Northridge, CA 91330-8288.
- What is John Sinclair's phone number?
- The practice phone number listed in the NPPES registry for John Sinclair is (818) 677-2856.
- Is John Sinclair's NPI active?
- Yes — John Sinclair's NPI (1124201553) is active in the NPPES registry as of the last update on 2007-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.