1. Home
  2. Directory
  3. California
  4. Northridge
  5. Audiologist Hearing Aid Fitter
  6. NPI Profile

DR. JOHN STEPHEN SINCLAIR PHD
NPI 1124201553
Audiologist-Hearing Aid Fitter in Northridge, CA

Active since December 07, 2007
18111 NORDHOFF ST, MONTEREY HALL, NORTHRIDGE, CA 91330(818) 677-2856(818) 677-5952 Get Directions Write a Review

NPPES record last updated: December 7, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. John Stephen Sinclair Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN STEPHEN SINCLAIR PHD (NPI 1124201553) is an individual audiologist-hearing aid fitter provider in Northridge, California, licensed in California (AU670) and active in the NPI registry since December 2007.

NPPES Registry Identity

NPI1124201553
Entity TypeIndividualMale
Primary Taxonomy237600000X
Provider Legal NameDR. JOHN STEPHEN SINCLAIRCredential: PHD
Location Address18111 NORDHOFF ST, MONTEREY HALLNorthridge, CA 91330-8288
Mailing Address18111 Nordhoff StNorthridge, CA 91330-8288 · (818) 677-2856 · Fax (818) 677-5952
Phone(818) 677-2856
Fax(818) 677-5952
Sole ProprietorYes
Enumeration DateDecember 7, 2007
✔ NPI 1124201553 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologist-Hearing Aid FitterSpeech, Language and Hearing Service Providers
Taxonomy Code237600000X
License✔ Licensed in CA · AU670
Definition
An audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of tests to determine the exact nature of an individual's hearing problem, presents a variety of treatment options to patients, dispenses and fits hearing aids, administers tests of balance to evaluate dizziness and provides hearing rehabilitation training. This classification should be used where individuals are licensed as audiologist-hearing aid fitters as opposed to states that license individuals as audiologists.
18111 NORDHOFF ST, Northridge, CA 91330
Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARTINE DOMINIQUE PAREKH AU.D FAAA, CCC-A
Audiologist
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (818) 677-5888
MR. JACK ANTHONY THORPE II ATC
Specialist/Technologist (Athletic Trainer)
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (805) 512-1480
ADRIANA URRUTIA
Specialist/Technologist (Athletic Trainer)
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (818) 677-1200
EMILY MICHELLE FERIALDI
Student in an Organized Health Care Education/Training Program
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (661) 713-2629
ARTTURI MATIAS SIMILA
Specialist/Technologist (Athletic Trainer)
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (818) 677-1200
SAMANTHA ALONSO
Student in an Organized Health Care Education/Training Program
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (818) 677-1200
COLE KISSICK
Specialist/Technologist (Athletic Trainer)
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (805) 373-1486
KENNETH MCGHEE PATTERSON AU.D
Audiologist
18111 NORDHOFF ST
NORTHRIDGE, CA 91330
Los Angeles County (818) 677-2856

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Sinclair's NPI number?

The NPI number for John Sinclair is 1124201553. It was assigned to this individual provider in the NPPES registry on December 7, 2007.

Where is John Sinclair located?

John Sinclair practices at 18111 Nordhoff St Monterey Hall, Northridge, CA 91330. The listed phone number is (818) 677-2856.

What is John Sinclair's specialty?

The primary specialty registered for this NPI is Audiologist-Hearing Aid Fitter with taxonomy code 237600000X.

When was this NPI record last updated?

The NPPES record for John Sinclair was last updated on December 7, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.