Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ahmad Abou Abbass, M.D

Surgical Oncology Physician in Mission Viejo, CA · enumerated 2008.

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

National Provider Identifier

1790946895

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Ahmad Abou Abbass

Credential M.D

Sex Male

Practice address 26732 Crown Valley Pkwy Ste 351, Mission Viejo, CA, 92691

Phone (949) 364-1007

Fax (949) 364-6057

Enumeration date Jun 20, 2008

Last updated in NPPES Apr 9, 2026

Taxonomy & licenses

204F00000X Transplant Surgery Physician Allopathic & Osteopathic Physicians · License 4301091303 (MI) Secondary

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License A152200 (CA) Primary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 4301091303 (MI) Secondary

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

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

Is NPI 1790946895 active?

Yes, as of the latest NPPES snapshot, NPI 1790946895 is active (record last updated 2026-04-09).

How do I verify Ahmad Abou Abbass's NPI record?

Cross-check NPI 1790946895 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Matthew Brady Surgery Physician · Mission Viejo, CA NPI 1376863621 Jacob Chai Acute Care Nurse Practitioner · Mission Viejo, CA NPI 1548779168 Katie Rogers Acute Care Nurse Practitioner · Mission Viejo, CA NPI 1649767476 Ashley Mergelmeyer Physician Assistant · Mission Viejo, CA NPI 1902397219 Kathy Nguyen Acute Care Nurse Practitioner · Mission Viejo, CA NPI 1437702552 Marialejandra Diaz Ibarra Retina Specialist (Ophthalmology) Physician · Mission Viejo, CA NPI 1851031173

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-09.