Danh Dan, M.D.
NPI 1790917631 · Internal Medicine Physician · Garden Grove, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Danh Dan, M.D. is a Internal Medicine Physician provider in Garden Grove, CA (NPI 1790917631).
Provider details
- NPI number
- 1790917631
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A112628 (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
16 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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 174 | 169 |
| Omeprazole | 110 | 51 |
| Pantoprazole Sodium | 50 | 21 |
| Mesalamine | 39 | 13 |
| Dicyclomine Hcl | 31 | 12 |
| Budesonidebrand: Budesonide Dr | 30 | 11 |
| Entecavir | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-08-11
- Last updated
- 2021-11-18
- Certified
- 2021-11-18
Frequently asked questions
- What is Danh Dan's NPI number?
- Danh Dan's National Provider Identifier (NPI) is 1790917631, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Danh Dan's specialty?
- Danh Dan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Danh Dan located?
- Danh Dan's practice location on file with NPPES is 12688 Chapman Ave, Garden Grove, CA 92840-4041.
- What is Danh Dan's phone number?
- The practice phone number listed in the NPPES registry for Danh Dan is (714) 697-9347.
- Does Danh Dan accept Medicare?
- Danh Dan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Danh Dan's NPI active?
- Yes — Danh Dan's NPI (1790917631) is active in the NPPES registry as of the last update on 2021-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.