John Isaac, MD
NPI 1922661867 · Psychiatry Physician · Corona, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Isaac, MD is a Psychiatry Physician provider in Corona, CA (NPI 1922661867).
Provider details
- NPI number
- 1922661867
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A181189 (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
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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
Mailing address
Additional practice locations (1)
- 4211 Avalon BlvdLos Angeles, CA 90011-5622Phone: (323) 563-9378
Registry dates
- Enumerated
- 2019-04-16
- Last updated
- 2024-04-26
- Certified
- 2024-04-26
Frequently asked questions
- What is John Isaac's NPI number?
- John Isaac's National Provider Identifier (NPI) is 1922661867, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Isaac's specialty?
- John Isaac is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Isaac located?
- John Isaac's practice location on file with NPPES is 4160 Temescal Canyon Rd Ste 205, Corona, CA 92883-4624.
- What is John Isaac's phone number?
- The practice phone number listed in the NPPES registry for John Isaac is (858) 279-1223.
- Does John Isaac accept Medicare?
- John Isaac is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Isaac's NPI active?
- Yes — John Isaac's NPI (1922661867) is active in the NPPES registry as of the last update on 2024-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.