Ryan Wu, MD
NPI 1598843641 · Internal Medicine Physician · Livermore, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Wu, MD is a Internal Medicine Physician provider in Livermore, CA (NPI 1598843641).
Provider details
- NPI number
- 1598843641
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A81955 (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
19 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 · 113 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 449 | 143 |
| Levothyroxine Sodium | 269 | 84 |
| Amlodipine Besylate | 226 | 77 |
| Losartan Potassium | 203 | 68 |
| Lisinopril | 192 | 68 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 166 | 30 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2021-12-13
Frequently asked questions
- What is Ryan Wu's NPI number?
- Ryan Wu's National Provider Identifier (NPI) is 1598843641, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Wu's specialty?
- Ryan Wu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Wu located?
- Ryan Wu's practice location on file with NPPES is 3000 Las Positas Rd, Livermore, CA 94551-9627.
- What is Ryan Wu's phone number?
- The practice phone number listed in the NPPES registry for Ryan Wu is (925) 243-2600.
- Does Ryan Wu accept Medicare?
- Ryan Wu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Wu's NPI active?
- Yes — Ryan Wu's NPI (1598843641) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.