Hallen Pham, MD
NPI 1811579667 · Internal Medicine Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hallen Pham, MD is a Internal Medicine Physician provider in Santa Clara, CA (NPI 1811579667).
Provider details
- NPI number
- 1811579667
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A197938 (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
5 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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 60 | 17 |
| Amlodipine Besylate | 40 | 12 |
| Tamsulosin Hcl | 35 | — |
| Losartan Potassium | 28 | 12 |
| Lisinopril | 26 | — |
| Metformin Hcl | 20 | — |
| Carvedilol | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-22
- Last updated
- 2024-10-20
- Certified
- 2024-10-20
Frequently asked questions
- What is Hallen Pham's NPI number?
- Hallen Pham's National Provider Identifier (NPI) is 1811579667, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hallen Pham's specialty?
- Hallen Pham is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hallen Pham located?
- Hallen Pham's practice location on file with NPPES is 710 Lawrence Expy Dept 272, Santa Clara, CA 95051-5173.
- What is Hallen Pham's phone number?
- The practice phone number listed in the NPPES registry for Hallen Pham is (408) 554-9800.
- Does Hallen Pham accept Medicare?
- Hallen Pham is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hallen Pham's NPI active?
- Yes — Hallen Pham's NPI (1811579667) is active in the NPPES registry as of the last update on 2024-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.