William Sandborn, M.D.
NPI 1639157563 · Gastroenterology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Sandborn, M.D. is a Gastroenterology Physician provider in San Diego, CA (NPI 1639157563).
Provider details
- NPI number
- 1639157563
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G63853 (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
- 2005-12-30
- Last updated
- 2019-08-29
Frequently asked questions
- What is William Sandborn's NPI number?
- William Sandborn's National Provider Identifier (NPI) is 1639157563, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sandborn's specialty?
- William Sandborn is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Sandborn located?
- William Sandborn's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9001.
- What is William Sandborn's phone number?
- The practice phone number listed in the NPPES registry for William Sandborn is (800) 926-8273.
- Does William Sandborn accept Medicare?
- William Sandborn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Sandborn's NPI active?
- Yes — William Sandborn's NPI (1639157563) is active in the NPPES registry as of the last update on 2019-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.