Joseph Marquis, MD
NPI 1598084329 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Marquis, MD is a Internal Medicine Physician provider in Oakland, CA (NPI 1598084329).
Provider details
- NPI number
- 1598084329
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A127074 (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 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 151 | 85 |
| Losartan Potassium | 75 | 44 |
| Amlodipine Besylate | 75 | 49 |
| Lisinopril | 70 | 48 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 67 | 17 |
| Levothyroxine Sodium | 62 | 39 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-18
- Last updated
- 2021-12-17
Frequently asked questions
- What is Joseph Marquis's NPI number?
- Joseph Marquis's National Provider Identifier (NPI) is 1598084329, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Marquis's specialty?
- Joseph Marquis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Marquis located?
- Joseph Marquis's practice location on file with NPPES is 2950 International Blvd, Oakland, CA 94601-2228.
- What is Joseph Marquis's phone number?
- The practice phone number listed in the NPPES registry for Joseph Marquis is (510) 535-4400.
- Does Joseph Marquis accept Medicare?
- Joseph Marquis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Marquis's NPI active?
- Yes — Joseph Marquis's NPI (1598084329) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.