Mai Duong, M.D.
NPI 1629339304 · Internal Medicine Physician · El Cajon, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mai Duong, M.D. is a Internal Medicine Physician provider in El Cajon, CA (NPI 1629339304).
Provider details
- NPI number
- 1629339304
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A127798 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 272 | 55 |
| Amlodipine Besylate | 168 | 31 |
| Lisinopril | 113 | 22 |
| Famotidine | 102 | 20 |
| Empagliflozinbrand: Jardiance | 98 | 19 |
| Gabapentin | 93 | 17 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-30
- Last updated
- 2023-05-10
- Certified
- 2023-05-10
Frequently asked questions
- What is Mai Duong's NPI number?
- Mai Duong's National Provider Identifier (NPI) is 1629339304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mai Duong's specialty?
- Mai Duong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mai Duong located?
- Mai Duong's practice location on file with NPPES is 525 E Main St, El Cajon, CA 92020-4007.
- What is Mai Duong's phone number?
- The practice phone number listed in the NPPES registry for Mai Duong is (619) 515-2498.
- Does Mai Duong accept Medicare?
- Mai Duong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mai Duong's NPI active?
- Yes — Mai Duong's NPI (1629339304) is active in the NPPES registry as of the last update on 2023-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.