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IDEAL GASTROENTEROLOGY ASSOCIATES
NPI 1063593739
Internal Medicine - Gastroenterology in Upland, CA

Active since October 18, 2006CLIA 05D2256519 · Certificate of Compliance
1310 SAN BERNARDINO RD STE 103, UPLAND, CA 91786(909) 920-0444(909) 920-5044 Get Directions Write a Review

NPPES record last updated: January 14, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ideal Gastroenterology Associates NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

IDEAL GASTROENTEROLOGY ASSOCIATES (NPI 1063593739) is a healthcare organization registered as a gastroenterology in Upland, California and active in the NPI registry since October 2006. The organization holds a CLIA Certificate of Compliance certificate valid through February 28, 2027, maintains a secondary practice location in Rancho Cucamonga, and lists Basim Z Abdelkarim, President, as its authorized official.

NPPES Registry Identity

NPI1063593739
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameBASIM Z. ABDELKARIM, M.D., INC.
Location Address1310 SAN BERNARDINO RD STE 103Upland, CA 91786-4985
Mailing Address1310 San Bernardino Rd Ste 103Upland, CA 91786-4985 · (909) 920-0444 · Fax (909) 920-5044
Phone(909) 920-0444
Fax(909) 920-5044
Organization SubpartNo
Authorized OfficialBasim Z AbdelkarimPresident · (909) 920-0444
Enumeration DateOctober 18, 2006
Last NPPES UpdateJanuary 14, 2025
NPPES CertifiedJanuary 14, 2025
✔ NPI 1063593739 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A74259
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1310 SAN BERNARDINO RD STE 103, Upland, CA 91786
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Other Names 2

Doing Business AsIdeal Gastroenterology Associates
Former Legal Business NameBasim Z. Abdelkarim M.d.

Secondary Practice Location 1

Location 18659 Haven Ave Ste 100Rancho Cucamonga, CA 91730-4893 · Phone (909) 920-0444

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ideal Gastroenterology Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

7

Medicare enrollment records show 7 clinicians reassign Medicare billing to Ideal Gastroenterology Associates, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 5 within 10 miles. They are listed nearest first.

Clinicians, nearest first (7)

Basim Abdelkarim, MD
Gastroenterology
NPI 1932217544
1310 SAN BERNARDINO RD SUITE 103
Upland, CA 91786
(909) 920-0444
✔ PECOS✔ Accepts MedicareSame address
Priyanka Yaramada
Hospitalist
NPI 1588008189
1310 SAN BERNARDINO RD STE 103
Upland, CA 91786
(909) 920-0444
✔ PECOS✔ Accepts MedicareSame address
Brianne Bridgeland, ARNP
Nurse Practitioner
NPI 1104070598
8659 HAVEN AVE STE 100
Rancho Cucamonga, CA 91730
(909) 920-0444
✔ PECOS3.4 mi
Muhammad Hammami, M.D.
Gastroenterology
NPI 1073801809
9140 HAVEN AVE STE 115
Rancho Cucamonga, CA 91730
(909) 606-4860
✔ PECOS✔ Accepts Medicare3.4 mi
Deborah Anghesom-Negusse, MD
Gastroenterology
NPI 1780862169
8221 ROCHESTER AVE STE 130
Rancho Cucamonga, CA 91730
(909) 360-1111
✔ PECOS✔ Accepts Medicare5.2 mi
Khodadad Mehraein, M.D.
Pathology
NPI 1316147374
1415 E 17TH ST SUITE 280
Santa Ana, CA 92705
(562) 225-2002
✔ PECOS✔ Accepts Medicare27 mi
Dalia Al-Mudallal, M.D.
Gastroenterology
NPI 1356502116
24411 HEALTH CENTER DR STE 430
Laguna Hills, CA 92653
(949) 452-3933
✔ PECOS✔ Accepts Medicare34 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 05D2256519

Basim Z Abdelkarim MD Inc Dba Ideal Gastro Associates · Upland, CA
Active · expires Feb 28, 2027
CLIA Number05D2256519
Laboratory TypePhysician Office
Certificate Effective DateMarch 1, 2025
Certificate Expiration DateFebruary 28, 2027
Laboratory DirectorKhodadad Mehraein
Laboratory Phone(909) 920-0444
Laboratory LocationBasim Z Abdelkarim MD Inc Dba Ideal Gastro Associates1310 San Bernardino Rd, Ste 103, Upland, CA 91786
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Basim Z. Abdelkarim, M.D., Inc.'s NPI number?

The NPI number for Basim Z. Abdelkarim, M.D., Inc. is 1063593739. It was assigned to this organization in the NPPES registry on October 18, 2006. The provider is doing business as Ideal Gastroenterology Associates. The provider was formerly known as Basim Z. Abdelkarim M.D..

Where is Basim Z. Abdelkarim, M.D., Inc. located?

Basim Z. Abdelkarim, M.D., Inc. is located at 1310 San Bernardino Rd Ste 103, Upland, CA 91786. The listed phone number is (909) 920-0444.

What is Basim Z. Abdelkarim, M.D., Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Basim Z. Abdelkarim, M.D., Inc. enrolled in Medicare?

Yes. Basim Z. Abdelkarim, M.D., Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Basim Z. Abdelkarim, M.D., Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians in 4 Medicare specialties reassign their Medicare billing to Basim Z. Abdelkarim, M.D., Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Gastroenterology (4), Hospitalist (1) and Nurse Practitioner (1). Of these, 2 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Basim Z. Abdelkarim, M.D., Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 05D2256519) is associated with this NPI, valid through February 28, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Basim Z. Abdelkarim, M.D., Inc. was last updated on January 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.