John Kassabian, M.D.
Internal Medicine Physician · Long Beach, CA
John Kassabian, M.D. is an internal medicine physician with a practice address in Long Beach, California, and NPI 1932207768, issued on Sep 20, 2006. Check the license (California G87727, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Kassabian
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G87727 CA
25MA03079500 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 1333 Chestnut Avenue, Long Beach, CA 90813
- Phone
- (562) 599-8601
- Enumerated
- Sep 20, 2006
- Record last updated
- Feb 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (562) 599-4916
- Medicaid ID
- 3985008 NJ
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1333 Chestnut Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judith Grkinich, REGISTERED NURSERegistered Nurse1285984617
Verify John Kassabian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G87727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John Kassabian among 17,696 internal medicine physician records in California
John Kassabian, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
221 internal medicine physician records list a practice address in Long Beach
They are 221 of the 13,650 NPPES records with a practice address in Long Beach, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Long Beach → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Katya Corado, M.D.Long Beach, CA 908131013109461
- Jasminka CrileyLong Beach, CA 908131174535017
- Peter Ferrera, M.D.Long Beach, CA 908131366481384
- Brian Hugh, D.O.Long Beach, CA 908131811013857
- Tom Ky, M.D.Long Beach, CA 908131558397869
- Thomas McCloy, MDLong Beach, CA 908131568476513
- Minh Nguyen, MDLong Beach, CA 908131922160613
- Kittya Paigne, MDLong Beach, CA 908131225058837
Common questions
What is John Kassabian, M.D.'s NPI number?
John Kassabian, M.D.'s National Provider Identifier (NPI) is 1932207768, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Kassabian, M.D. located?
The NPPES record lists a practice address at 1333 Chestnut Avenue, Long Beach, CA, 90813. Phone: (562) 599-8601. Providers update this record themselves, so call before visiting.
How can I verify John Kassabian, M.D.'s license?
NPPES lists California license number G87727, 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. 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.