Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Geoffery Alan O'Neill, MD

Individual provider Anesthesiology Physician · NPI 1871750497

Dr. Geoffery Alan O'Neill, MD is an Anesthesiology in Marina del Rey, California. Qualified in 2005, 21 years ago. Practices with Bayside Anesthesia Medical Group, a 48-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
21
Licensed in
CA
In the registry since
2008
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

3111 Via Dolce Apt 506
Marina del Rey, CA 90292-5077
Phone: (310) 965-6666
Fax: (310) 929-8436
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A97758 (CA)

Record details

NPI number1871750497
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 21, 2008
Last updated in NPPESJanuary 2, 2026
Certification dateJanuary 2, 2026

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Bayside Anesthesia Medical Group — 48 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Marina del Rey