NPPES file of Aug 9, 2026

Ammar Istwani, M.D.

Diagnostic Radiology Physician · Long Beach, CA

Ammar Istwani, M.D. is a diagnostic radiology physician with a practice address in Long Beach, California, and NPI 1386683258, issued on Jun 6, 2006. Check the license (California G80027, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1386683258
Name
Ammar Istwani
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
G80027 CA
Self-reported in NPPES; status is on the state search
Practice location
1045 Atlantic Ave, Long Beach, CA 90813
Phone
(562) 491-9167
Enumerated
Jun 6, 2006
Record last updated
Aug 20, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(562) 491-7969
Medicaid ID
00G800270 CA
Medicare enrollment
Enrolled (PECOS I20040720000871); accepts Medicare assignment
Medical or professional school
Ohio State University College Of Medicine, 1992
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Also registered at 1045 Atlantic Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Abdul Abbasi, MDCardiovascular Disease Physician1710071717
  2. Rebecca Alleyne, M.DSurgery Physician1356389050
  3. Rose Mary Berman, M.D.Family Medicine Physician1225113830
  4. Charles Brown, M.D.Diagnostic Radiology Physician1134306236
  5. Ignacio Carrillo-Nunez, M.D.Neurology Physician1205827201
  6. Coreen Correa, FNPFamily Nurse Practitioner1063720324

Verify Ammar Istwani in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G80027    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Dignity Health Medical FoundationGrass Valley, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ammar Istwani among 4,500 diagnostic radiology physician records in California

Ammar Istwani, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1992 · median 2004 among the 3,130 with a school on file
  • Record last updated2018 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California.

All 4,500 in California → Every provider in Long Beach → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Charles Brown, M.D.Long Beach, CA 908131134306236
  2. Christine Khong-McBride, M.D.Long Beach, CA 908131578827697
  3. Ann Marie Levan, M.D.Long Beach, CA 908131629017512
  4. Gregory Vanley, M.D.Long Beach, CA 908131639118656
  5. Bassam Zahlan, M.D.Long Beach, CA 908131346289220
  6. Carol Manning, MDLong Beach, CA 908081154346336
  7. Emilia Olson, MD, PHDLong Beach, CA 908081790005494
  8. Timothy Bell, MDLong Beach, CA 908071073596573

Common questions

What is Ammar Istwani, M.D.'s NPI number?

Ammar Istwani, M.D.'s National Provider Identifier (NPI) is 1386683258, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Ammar Istwani, M.D. located?

The NPPES record lists a practice address at 1045 Atlantic Ave, Long Beach, CA, 90813. Phone: (562) 491-9167. Providers update this record themselves, so call before visiting.

How can I verify Ammar Istwani, M.D.'s license?

NPPES lists California license number G80027, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.