Harold Keer, MD
NPI 1124154398 · Hematology & Oncology Physician · Stanford, CA
Harold Keer, MD is a Hematology & Oncology Physician provider in Stanford, CA (NPI 1124154398).
Provider details
- NPI number
- 1124154398
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G78924 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-24
- Last updated
- 2008-04-04
Frequently asked questions
- What is Harold Keer's NPI number?
- Harold Keer's National Provider Identifier (NPI) is 1124154398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Keer's specialty?
- Harold Keer is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Keer located?
- Harold Keer's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Harold Keer's phone number?
- The practice phone number listed in the NPPES registry for Harold Keer is (650) 723-4000.
- Is Harold Keer's NPI active?
- Yes — Harold Keer's NPI (1124154398) is active in the NPPES registry as of the last update on 2008-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.