Karen Holbrook, MD, MPH
NPI 1235211954 · Infectious Disease Physician · Sebastopol, CA
Karen Holbrook, MD, MPH is a Infectious Disease Physician provider in Sebastopol, CA (NPI 1235211954).
Provider details
- NPI number
- 1235211954
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Female
- Sole proprietor
- Yes
- License
- G84580 (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
- 2006-10-20
- Last updated
- 2021-03-17
- Certified
- 2021-03-17
Frequently asked questions
- What is Karen Holbrook's NPI number?
- Karen Holbrook's National Provider Identifier (NPI) is 1235211954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Holbrook's specialty?
- Karen Holbrook is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Holbrook located?
- Karen Holbrook's practice location on file with NPPES is 715 Hurlbut Ave, Sebastopol, CA 95472-2825.
- What is Karen Holbrook's phone number?
- The practice phone number listed in the NPPES registry for Karen Holbrook is (707) 889-9649.
- Is Karen Holbrook's NPI active?
- Yes — Karen Holbrook's NPI (1235211954) is active in the NPPES registry as of the last update on 2021-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.