Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ammar Istwani, M.D.

Diagnostic Radiology Physician in Long Beach, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1386683258

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Registry record

Entity type Individual (Type 1)

Name Ammar Istwani

Credential M.D.

Sex Male

Practice address 1045 Atlantic Ave, Suite 105, Long Beach, CA, 90813

Phone (562) 491-9167

Fax (562) 491-7969

Enumeration date Jun 6, 2006

Last updated in NPPES Aug 20, 2018

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G80027 (CA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License G80027 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
HW8412	Other	CA	GROUP PTAN
P00479357	Other	CA	RR MEDICARE
00G800270	Other	CA	BCBS
HW8412A	Other	CA	PTAN/LEGACY PACIFIC HOSP
HW881	Other	CA	ST MARYS PTAN
00G800270	Medicaid	CA	-
HW8412B	Other	CA	PTAN/LEGACY COMMUNITY HOSP

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ammar Istwani?

The National Provider Identifier (NPI) for Ammar Istwani is 1386683258, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ammar Istwani practice?

The practice location on file with NPPES is in Long Beach, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-20.