Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Gilbert Owen Andersen, MD

Individual provider Internal Medicine Physician · NPI 1821091836

Dr. Gilbert Owen Andersen, MD practises Internal Medicine in Lompoc, California. Graduated from University of California, Irvine, California College of Medicine in 1974, 52 years ago. Practices with Lompoc Valley Medical Center, a 91-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
52
Trained at
University of California, Irvine, California College of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

136 N 3rd St
Lompoc, CA 93436-7002
Phone: (805) 736-1253
Fax: (805) 736-5355
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A29916 (CA)

Record details

NPI number1821091836
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 23, 2005
Last updated in NPPESNovember 29, 2016

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduated 1974 (52 years in practice)
Group practice Lompoc Valley Medical Center — 91 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 24 times · 50th percentile
Laminectomy or laminotomy (partial removal of spine bones) 1–10 times
Lower limb (leg) arthroscopy (minimally invasive joint repair) 1–10 times
Removal or shaving of skin growth 1–10 times
Spinal fusion 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Lompoc Valley Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 91 clinicians in the practice; 12 are shown here.

Other providers in Lompoc