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WOOSUNG AHN, M.D., INC
NPI 1285766253
Internal Medicine in Lakewood, CA

Active since March 12, 2007CLIA 05D0887759 · Waiver
20145 PIONEER BLVD, LAKEWOOD, CA 90715(562) 916-5020(562) 916-5022 Get Directions Write a Review

NPPES record last updated: June 21, 2018. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Woosung Ahn, M.d., Inc NPPES

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

WOOSUNG AHN, M.D., INC (NPI 1285766253) is a healthcare organization registered as an internal medicine in Lakewood, California and active in the NPI registry since March 2007. The organization holds a CLIA Waiver certificate valid through June 15, 2028 and lists Woosung Ahn, President, as its authorized official.

NPPES Registry Identity

NPI1285766253
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameWOOSUNG AHN, M.D., INC
Location Address20145 PIONEER BLVDLakewood, CA 90715-1051
Mailing Address20145 Pioneer BlvdLakewood, CA 90715-1051 · (562) 916-5020 · Fax (562) 916-5022
Phone(562) 916-5020
Fax(562) 916-5022
Organization SubpartNo
Authorized OfficialWoosung AhnPresident · (562) 916-5020
Enumeration DateMarch 12, 2007
Last NPPES UpdateJune 21, 2018
✔ NPI 1285766253 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A51408
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
20145 PIONEER BLVD, Lakewood, CA 90715
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Other Identifiers 1

Medicaid00A514080CA

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

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 Waiver 05D0887759

Woo-Sung Ahn MD · Lakewood, CA
Active · expires Jun 15, 2028
CLIA Number05D0887759
Laboratory TypePhysician Office
Certificate Effective DateJune 16, 2026
Certificate Expiration DateJune 15, 2028
Laboratory DirectorWoo S. Ahn
Laboratory Phone(562) 916-5020
Laboratory LocationWoo-Sung Ahn MD20145 S Pioneer Blvd, Lakewood, CA 90715
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

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

The NPI number for Woosung Ahn, M.D., Inc is 1285766253. It was assigned to this organization in the NPPES registry on March 12, 2007.

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

Woosung Ahn, M.D., Inc is located at 20145 Pioneer Blvd, Lakewood, CA 90715. The listed phone number is (562) 916-5020.

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

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Does Woosung Ahn, M.D., Inc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0887759) is associated with this NPI, valid through June 15, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Woosung Ahn, M.D., Inc was last updated on June 21, 2018. NPI Profile syncs with the weekly NPPES data releases published by CMS.