Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John Christian Oneil, MD

Individual provider General Practice Physician · NPI 1952573826

Dr. John Christian Oneil, MD is a General Practice Physician in Calistoga, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3076 Myrtledale Rd
Calistoga, CA 94515-1052
Phone: (707) 942-6888
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence A118663 (CA)

Record details

NPI number1952573826
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 31, 2008
Last updated in NPPESJuly 2, 2026
Certification dateJuly 2, 2026