Donald Knotts, MEDICAL DOCTOR
NPI 1790858611 · Internal Medicine Physician · Castro Valley, CA
Donald Knotts, MEDICAL DOCTOR is a Internal Medicine Physician provider in Castro Valley, CA (NPI 1790858611).
Provider details
- NPI number
- 1790858611
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MEDICAL DOCTOR
- Sex
- Male
- Sole proprietor
- Yes
- License
- G33548 (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
- 2006-11-16
- Last updated
- 2007-07-09
Frequently asked questions
- What is Donald Knotts's NPI number?
- Donald Knotts's National Provider Identifier (NPI) is 1790858611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Knotts's specialty?
- Donald Knotts is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Knotts located?
- Donald Knotts's practice location on file with NPPES is 20130 Lake Chabot Rd, Castro Valley, CA 94546-5340.
- What is Donald Knotts's phone number?
- The practice phone number listed in the NPPES registry for Donald Knotts is (510) 886-3701.
- Is Donald Knotts's NPI active?
- Yes — Donald Knotts's NPI (1790858611) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.