Dr. John Christian Oneil , MD
General Practice • Calistoga, CA
Professional Overview & Biography Verified Profile Summary
Dr. John Oneil, MD is a registered healthcare professional specializing in General Practice in Calistoga, CA. Practice services are available at 3076 MYRTLEDALE RD under active NPI credentials.
Practice Location & Contact Primary Location
3076 Myrtledale Rd
Calistoga, CA 945151052
Specialty Benchmarks & Practice Insights
Comparative analytics for General Practice in Calistoga, CA
Practicing in Calistoga, CA (2300 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-07-02NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Physician Assistant
Physician Assistant (Certified)
Social Worker - Clinical
Licensed Clinical Social Worker
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 3076 MYRTLEDALE RD, CALISTOGA, CA 945151052 (Tel: 7079426888)
Registered at PO BOX 1793, MIDDLETOWN, CA 954611793 (Tel: 5055064044)
Registered at 1530 THE ALAMEDA STE 301, SAN JOSE, CA 951262303 (Tel: 5055064044)
NPI status registered as active in NPPES database
Registered at 1659 SCOTT BLVD STE 30, SANTA CLARA, CA 950504137 (Tel: 4082441834)
Registered at 930 SPRING ST, OAK VIEW, CA 930229719 (Tel: (505) 506-4044)
Recorded as JOHN ONEIL, M.D.
General Practice (License #A118663 in CA)
NPI status registered as active in NPPES database
Registered at 2425 ENBORG LN, SAN JOSE, CA 951282648 (Tel: 4088855400)
Registered at 1441 CAPRI DR, CAMPBELL, CA 950086818 (Tel: 5055064044)
Recorded as JOHN ONEIL, M.D.
General Practice (License #A118663 in CA)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
Po Box 1793
Middletown, CA 954611793
Phone: 5055064044
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.