John Joseph Isaac, MD
Psychiatry Physician · Corona, CA
John Joseph Isaac, MD is a psychiatry physician with a practice address in Corona, California, and NPI 1922661867, issued on Apr 16, 2019. Check the license (California A181189, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Joseph Isaac
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A181189 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4160 Temescal Canyon RD Ste 205, Corona, CA 92883
- Phone
- (858) 279-1223
- Enumerated
- Apr 16, 2019
- Record last updated
- Apr 26, 2024
- Medicare enrollment
- Enrolled (PECOS I20250402000528); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 4160 Temescal Canyon RD Ste 205
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mariel Abisaab, LMFTMarriage & Family Therapist1609339530
- Lori Baber, LCSWClinical Social Worker1184242158
- John Bradford, PSYD, LPPsychologist1083677561
- Eric Burnell, LCSWClinical Social Worker1578986279
- Josephine Chu, LMFTMarriage & Family Therapist1689018111
- Sylvana Elali, LMFTMarriage & Family Therapist1114379922
Verify John Joseph Isaac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A181189Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Ehab Yacoub MD IncGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Joseph Isaac among 8,673 psychiatry physician records in California
John Joseph Isaac, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 13% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2019 · median 2005 among the 3,295 with a school on file
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Corona → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jack Lyden, MDCorona, CA 928831346980919
- Adrian Jacques Ambrose, M.D.Corona, CA 928821528485679
- Purshotam Kataria, M.D.Corona, CA 928821073582482
- Malini Singh, DOCorona, CA 928821639758618
- Raj Rajani, M.D.Corona, CA 928811861566572
- Clarice Chan, M.D.Yorba Linda, CA 928861073856084
- Moataz Giurgius, MDYorba Linda, CA 928861548217573
- Shadee Giurgius, MDYorba Linda, CA 928861376170100
Common questions
What is John Joseph Isaac, MD's NPI number?
John Joseph Isaac, MD's National Provider Identifier (NPI) is 1922661867, issued on Apr 16, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Joseph Isaac, MD located?
The NPPES record lists a practice address at 4160 Temescal Canyon RD Ste 205, Corona, CA, 92883. Phone: (858) 279-1223. Providers update this record themselves, so call before visiting.
How can I verify John Joseph Isaac, MD's license?
NPPES lists California license number A181189, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.