Woosung Ahn, M.D., Inc
NPI 1285766253 · Internal Medicine Physician · Lakewood, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Woosung Ahn, M.D., Inc is a Internal Medicine Physician organization in Lakewood, CA (NPI 1285766253).
Provider details
- NPI number
- 1285766253
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Woosung Ahn, President(562) 916-5020
- License
- A51408 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-12
- Last updated
- 2018-06-21
Frequently asked questions
- What is Woosung Ahn, M.D., Inc's NPI number?
- Woosung Ahn, M.D., Inc's National Provider Identifier (NPI) is 1285766253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Woosung Ahn, M.D., Inc?
- Woosung Ahn, M.D., Inc is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Woosung Ahn, M.D., Inc located?
- Woosung Ahn, M.D., Inc's practice location on file with NPPES is 20145 Pioneer Blvd, Lakewood, CA 90715-1051.
- What is Woosung Ahn, M.D., Inc's phone number?
- The practice phone number listed in the NPPES registry for Woosung Ahn, M.D., Inc is (562) 916-5020.
- Does Woosung Ahn, M.D., Inc accept Medicare?
- Woosung Ahn, M.D., Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Woosung Ahn, M.D., Inc?
- The authorized official listed on Woosung Ahn, M.D., Inc's NPPES record is Woosung Ahn, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Woosung Ahn, M.D., Inc's NPI active?
- Yes — Woosung Ahn, M.D., Inc's NPI (1285766253) is active in the NPPES registry as of the last update on 2018-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.