Zaina El-Isa, MD
NPI 1861623555 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zaina El-Isa, MD is a Internal Medicine Physician provider in Oakland, CA (NPI 1861623555).
Provider details
- NPI number
- 1861623555
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301094067 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fosfomycin Tromethamine | 57 | 18 |
| Amoxicillin | 34 | 15 |
| Cephalexin | 34 | 13 |
| Doxycycline Monohydrate | 27 | — |
| Itraconazole | 20 | — |
| Cefadroxil | 17 | — |
| Vancomycin Hcl | 17 | — |
| Fluconazole | 16 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-29
- Last updated
- 2021-12-22
Frequently asked questions
- What is Zaina El-Isa's NPI number?
- Zaina El-Isa's National Provider Identifier (NPI) is 1861623555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zaina El-Isa's specialty?
- Zaina El-Isa is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zaina El-Isa located?
- Zaina El-Isa's practice location on file with NPPES is 2950 International Blvd, Oakland, CA 94601-2228.
- What is Zaina El-Isa's phone number?
- The practice phone number listed in the NPPES registry for Zaina El-Isa is (510) 535-4410.
- Does Zaina El-Isa accept Medicare?
- Zaina El-Isa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zaina El-Isa's NPI active?
- Yes — Zaina El-Isa's NPI (1861623555) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.