William Buchholz, MD
NPI 1699774406 · Hematology (Internal Medicine) Physician · Los Altos, CA
William Buchholz, MD is a Hematology (Internal Medicine) Physician provider in Los Altos, CA (NPI 1699774406).
Provider details
- NPI number
- 1699774406
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G-23475 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
Mailing address
Registry dates
- Enumerated
- 2005-07-14
- Last updated
- 2013-07-25
Frequently asked questions
- What is William Buchholz's NPI number?
- William Buchholz's National Provider Identifier (NPI) is 1699774406, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Buchholz's specialty?
- William Buchholz is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Buchholz located?
- William Buchholz's practice location on file with NPPES is 851 Fremont Ave, Los Altos, CA 94024-5698.
- What is William Buchholz's phone number?
- The practice phone number listed in the NPPES registry for William Buchholz is (650) 980-1982.
- Is William Buchholz's NPI active?
- Yes — William Buchholz's NPI (1699774406) is active in the NPPES registry as of the last update on 2013-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.