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DAVID AHN, M.D., INC
NPI 1114501848
Internal Medicine - Endocrinology, Diabetes & Metabolism in Newport Beach, CA

Active since May 10, 2021
520 SUPERIOR AVE STE 150, NEWPORT BEACH, CA 92663(949) 764-7366(949) 642-7703 Get Directions Write a Review

NPPES record last updated: May 10, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About David Ahn, M.d., Inc NPPES

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

DAVID AHN, M.D., INC (NPI 1114501848) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Newport Beach, California and active in the NPI registry since May 2021. The organization lists David Ahn, President, as its authorized official.

NPPES Registry Identity

NPI1114501848
Entity TypeOrganization
Primary Taxonomy207RE0101X
Legal Business NameDAVID AHN, M.D., INC
Location Address520 SUPERIOR AVE STE 150Newport Beach, CA 92663-3642
Mailing Address520 Superior Ave Ste 150Newport Beach, CA 92663-3642
Phone(949) 764-7366
Fax(949) 642-7703
Organization SubpartNo
Authorized OfficialDavid AhnPresident · (858) 281-3333
Enumeration DateMay 10, 2021
NPPES CertifiedMay 10, 2021
✔ NPI 1114501848 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
520 SUPERIOR AVE STE 150, Newport Beach, CA 92663
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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)

David Ahn, M.d., Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to David Ahn, M.D., Inc, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

David Ahn, MD
Endocrinology
NPI 1184949570
520 SUPERIOR AVE STE 150
Newport Beach, CA 92663
(949) 764-7366
✔ PECOS✔ Accepts MedicareSame address
Diana Zhao, MD
Endocrinology
NPI 1295199768
520 SUPERIOR AVE STE 150
Newport Beach, CA 92663
(949) 764-8065
✔ PECOS✔ Accepts MedicareSame address
Jonathan Huang, MD
Endocrinology
NPI 1740749852
520 SUPERIOR AVE
Newport Beach, CA 92663
(949) 764-8065
✔ PECOS✔ Accepts MedicareSame address
Tanzila Razzaki, M.D.
Endocrinology
NPI 1619396769
500 SUPERIOR AVE STE 100
Newport Beach, CA 92663
(949) 764-8379
✔ PECOS✔ Accepts Medicare0.1 mi
Kristen Nguyen, M.D.
Endocrinology
NPI 1669884821
2699 ATLANTIC AVE
Long Beach, CA 90806
(562) 426-3333
✔ PECOS19 mi

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

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 David Ahn, M.D., Inc's NPI number?

The NPI number for David Ahn, M.D., Inc is 1114501848. It was assigned to this organization in the NPPES registry on May 10, 2021.

Where is David Ahn, M.D., Inc located?

David Ahn, M.D., Inc is located at 520 Superior Ave Ste 150, Newport Beach, CA 92663. The listed phone number is (949) 764-7366.

What is David Ahn, M.D., Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is David Ahn, M.D., Inc enrolled in Medicare?

Yes. David Ahn, M.D., Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through David Ahn, M.D., Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians, all in Endocrinology, reassign their Medicare billing to David Ahn, 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. Of these, 3 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for David Ahn, M.D., Inc was last updated on May 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.