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Walter Wu, M.D.
NPI 1891913851 · Internal Medicine Physician · Palo Alto, CA
Walter Wu, M.D. is a Internal Medicine Physician provider in Palo Alto, CA (NPI 1891913851).
Provider details
- NPI number
- 1891913851
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A064310 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
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.
Practice location
755 Page Mill Rd
Palo Alto, CA 94304-1018
Phone: (650) 813-5659
Street-level locationGet directions
Mailing address
1888 Robles Ranch Rd
Los Altos, CA 94024-6774
Registry dates
- Enumerated
- 2007-04-23
- Last updated
- 2013-05-10
Frequently asked questions
- What is Walter Wu's NPI number?
- Walter Wu's National Provider Identifier (NPI) is 1891913851, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Wu's specialty?
- Walter Wu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Wu located?
- Walter Wu's practice location on file with NPPES is 755 Page Mill Rd, Palo Alto, CA 94304-1018.
- What is Walter Wu's phone number?
- The practice phone number listed in the NPPES registry for Walter Wu is (650) 813-5659.
- Is Walter Wu's NPI active?
- Yes — Walter Wu's NPI (1891913851) is active in the NPPES registry as of the last update on 2013-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.