Dean Ahn, MD
NPI 1821165846 · Surgery Physician · Bellflower, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dean Ahn, MD is a Surgery Physician provider in Bellflower, CA (NPI 1821165846).
Provider details
- NPI number
- 1821165846
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G83801 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tramadol Hcl | 74 | 70 |
| Gabapentin | 74 | 70 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 | 20 |
| Metronidazole | 20 | 17 |
| Loperamide Hclbrand: Loperamide | 18 | — |
| Omeprazole | 15 | — |
| Cephalexin | 14 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-29
- Last updated
- 2021-11-29
Frequently asked questions
- What is Dean Ahn's NPI number?
- Dean Ahn's National Provider Identifier (NPI) is 1821165846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dean Ahn's specialty?
- Dean Ahn is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Dean Ahn located?
- Dean Ahn's practice location on file with NPPES is 9400 Rosecrans Ave, Bellflower, CA 90706-2246.
- What is Dean Ahn's phone number?
- The practice phone number listed in the NPPES registry for Dean Ahn is (562) 461-3000.
- Does Dean Ahn accept Medicare?
- Dean Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dean Ahn's NPI active?
- Yes — Dean Ahn's NPI (1821165846) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.