Quick answers
- Which hospitals does Gilbert O. Andersen work at?
- Medicare's official clinician data lists Gilbert O. Andersen at 1 hospital: Lompoc Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gilbert O. Andersen see patients?
- Medicare's clinician data lists 2 practice locations, including Lompoc, CA. Call before your visit to confirm the address.
- What is Gilbert O. Andersen's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Gilbert O. Andersen accept Medicare assignment?
- Yes. Medicare's clinician data says Gilbert O. Andersen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gilbert O. Andersen?
- (805) 737-8700, as listed in official Medicare / NPI Registry data.
- What is Gilbert O. Andersen's NPI number?
- 1821091836. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gilbert O. Andersen works
Medicare's Facility Affiliation Data lists Gilbert O. Andersen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lompoc Valley Medical CenterLompoc, CA · Acute Care Hospital · CCN 050110
Practice locations
Addresses where Gilbert O. Andersen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1225 N H StLompoc, CA 93436 (805) 737‑8700
- 136 N 3rd StLompoc, CA 93436 (805) 737‑3300
Group practices
Medicare enrollment lists Gilbert O. Andersen as a member of this group (CMS data updated 2026-10-02).
- Lompoc Valley Medical Center91 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Lompoc
Clinicians with the same Medicare primary specialty in Lompoc, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1974 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821091836 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians