William Koch, M.D.
NPI 1821063686 · Obstetrics & Gynecology Physician · Eureka, CA
William Koch, M.D. is a Obstetrics & Gynecology Physician provider in Eureka, CA (NPI 1821063686).
Provider details
- NPI number
- 1821063686
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G36829 (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
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
- 2006-02-22
- Last updated
- 2016-02-12
Frequently asked questions
- What is William Koch's NPI number?
- William Koch's National Provider Identifier (NPI) is 1821063686, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Koch's specialty?
- William Koch is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is William Koch located?
- William Koch's practice location on file with NPPES is 2773 Harris St, Eureka, CA 95503-4866.
- What is William Koch's phone number?
- The practice phone number listed in the NPPES registry for William Koch is (707) 444-9664.
- Is William Koch's NPI active?
- Yes — William Koch's NPI (1821063686) is active in the NPPES registry as of the last update on 2016-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.