AHMAD ABOU ABBASS M.D – NPI #1790946895
Surgery

A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.

Health Care Provider Taxonomy Code for Surgery

AHMAD ABOU ABBASS is a surgeon located in MISSION VIEJO, CA. NPPES has assigned the NPI number 1790946895 to AHMAD ABOU ABBASS on June 20, 2008. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2086X0206X from the Health Care Provider Taxonomy code set, which is classified as Surgery, specializing in Surgical Oncology

The NPI profile was last updated on Apr 09, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for AHMAD ABOU ABBASS below.

NPI Profile for
AHMAD ABOU ABBASS

NPI Number
1790946895
Enumeration Date

(about 18 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
AHMAD ABOU ABBASS
Credentials
M.D
Primary location
26732 CROWN VALLEY PKWY STE 351
MISSION VIEJO, CA 92691
Phone: (949) 364-1007 Fax: (949) 364-6057
1 Other location(s):
1000 Fivepoint Ste A
Irvine, CA 92618-2621
Phone: (949) 671-8000
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
Apr 09, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
2086X0206X
- Surgery / Surgical Oncology (Primary)		 CA A152200
208600000X
- Surgery		 MI 4301091303
204F00000X
- Transplant Surgery		 MI 4301091303

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Endpoint

Health Information Exchange (HEI)

HEI is the mobilization of health care information electronically across organizations within a region, community or hospital system. Endpoints provide a simple and secure way for participants to send authenticated, encrypted health information directly to known, trusted recipients over the internet such as primary care physicians, specialists, hospitals, labs, etc.

Endpoint
[email protected]
Endpoint type
Direct Messaging Address
Endpoint Description
Content Type
Affiliation
Y
Endpoint Location
1000 FIVEPOINT,
IRVINE, CA 77025-1669

Additional Information

Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
AHMAD ABOU ABBASS is affiliated with the following medical group(s):
  • HOSPITAL
    • MEMORIALCARE SADDLEBACK MEDICAL CENTER
      24451 HEALTH CENTER DRIVE
      LAGUNA HILLS, CA 92653
    • PROVIDENCE MISSION HOSPITAL
      27700 MEDICAL CENTER RD
      MISSION VIEJO, CA 92691

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
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Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.