Timothy Litwin, D.O.
NPI 1891032421 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Litwin, D.O. is a Internal Medicine Physician provider in Oakland, CA (NPI 1891032421).
Provider details
- NPI number
- 1891032421
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A12348 (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
13 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 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 427 | 169 |
| Amlodipine Besylate | 195 | 86 |
| Lisinopril | 184 | 79 |
| Losartan Potassium | 153 | 71 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 114 | 29 |
| Atenolol | 112 | 48 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-01-16
- Last updated
- 2021-12-15
Frequently asked questions
- What is Timothy Litwin's NPI number?
- Timothy Litwin's National Provider Identifier (NPI) is 1891032421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Litwin's specialty?
- Timothy Litwin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Litwin located?
- Timothy Litwin's practice location on file with NPPES is 1411 E 31st St, Oakland, CA 94602-1018.
- What is Timothy Litwin's phone number?
- The practice phone number listed in the NPPES registry for Timothy Litwin is (510) 437-3800.
- Does Timothy Litwin accept Medicare?
- Timothy Litwin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Litwin's NPI active?
- Yes — Timothy Litwin's NPI (1891032421) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.