Sigve Tonstad, M.D.
NPI 1043499098 · Internal Medicine Physician · Loma Linda, CA
Sigve Tonstad, M.D. is a Internal Medicine Physician provider in Loma Linda, CA (NPI 1043499098).
Provider details
- NPI number
- 1043499098
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G62012 (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
18 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
- 2007-10-26
- Last updated
- 2008-07-01
Frequently asked questions
- What is Sigve Tonstad's NPI number?
- Sigve Tonstad's National Provider Identifier (NPI) is 1043499098, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sigve Tonstad's specialty?
- Sigve Tonstad is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sigve Tonstad located?
- Sigve Tonstad's practice location on file with NPPES is 11370 Anderson St, Loma Linda, CA 92354-3450.
- What is Sigve Tonstad's phone number?
- The practice phone number listed in the NPPES registry for Sigve Tonstad is (909) 558-2870.
- Is Sigve Tonstad's NPI active?
- Yes — Sigve Tonstad's NPI (1043499098) is active in the NPPES registry as of the last update on 2008-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.