Dr. John Christian Oneil, MD
- Part D claims, 2024
- 13
- Hospital affiliations
- 1
- Industry payments
- $218
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 9920 Talbert Avenue, Fountain Valley, CA 92708
- Practice phone
- Call (714) 378-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oneil's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Christian Oneil is a general practice physician in Fountain Valley, California
Dr. Oneil practices at Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
Dr. Oneil's NPI, 1952573826, was assigned on March 31, 2008. Dr. Oneil holds California license A118663.
- NPI
- 1952573826NPI Registry (opens in a new tab)
- NPI enumeration date
- March 31, 2008
- NPI status
- Active
- Practice phone
- (714) 378-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Christian Oneil practices at Orange Coast Medical Center in Fountain Valley, California
Dr. Oneil's primary practice is Orange Coast Medical Center, at 9920 Talbert Avenue, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 378-7000.
- Orange Coast Medical Center9920 Talbert Avenue, Fountain Valley, CA 92708 · Orange CountyPhone(714) 378-7000
Source: Dmand AI Affiliation Data
Dr. John Christian Oneil is affiliated with 1 site of care
Dr. Oneil's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Christian Oneil's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oneil practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange Coast Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across MemorialCare Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Christian Oneil is one of 1,526 general practice physicians in California
General practice is Dr. Oneil's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Oneil is licensed in California.
Specialties and state licenses
- General practice, CaliforniaPrimary
General practice physicians near Dr. Oneil
Counts of general practice physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Christian Oneil's patients have a median age of 40
Across all payers, Dmand AI patient panel data puts Dr. Oneil's median patient age at 40, with 24% women.
Dr. Oneil's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women24%
- Men75%
Source: Dmand AI Patient Panel Data
Dr. John Christian Oneil wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Oneil wrote 13 Medicare Part D claims. 92% of them were for generic drugs.
Dr. Oneil's Part D claims by kind of drug, 2024
- Generic12 claims92%
- Brand-name and other1 claims8%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. John Christian Oneil received $218 in industry payments from 2016 to 2018
CMS Open Payments shows 3 general payments to Dr. Oneil from 3 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $100.
General payments to Dr. Oneil by program year, 2016 to 2018
Companies that paid Dr. Oneil the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Christian Oneil's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Christian Oneil
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Christian Oneil's NPI number?
Dr. John Christian Oneil's NPI number is 1952573826. It was assigned on March 31, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Christian Oneil?
Dr. John Christian Oneil is a general practice physician in Fountain Valley, California. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. John Christian Oneil practice?
Dr. Oneil practices at 9920 Talbert Avenue, Fountain Valley, CA 92708. Dr. Oneil's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
What is Dr. John Christian Oneil's office phone number?
The practice phone on file for Dr. Oneil is (714) 378-7000.
What is Dr. John Christian Oneil's medical license number?
Dr. Oneil holds California license A118663.
Which hospitals is Dr. John Christian Oneil affiliated with?
Dr. Oneil practices at Orange Coast Medical Center in Fountain Valley, California.
Has Dr. John Christian Oneil received payments from drug or device companies?
CMS Open Payments shows $218 in general payments to Dr. Oneil from 3 companies from 2016 to 2018. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. John Christian Oneil been practicing?
Dr. Oneil's NPI was assigned in 2008.
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