Tamara A. O'Nan, PA-C
- Part D claims, 2024
- 1,016
- Industry payments
- $2,080
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 5020 Campus Dr, Newport Beach, CA 92660
- Practice phone
- Call (949) 945-0927
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Allied Psychiatry and Mental Health
Newport Beach, California
Find Tamara O'Nan'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.
Tamara A. O'Nan is a physician assistant in Newport Beach, California
Tamara O'Nan practices at Allied Psychiatry and Mental Health in Newport Beach, California.
Tamara O'Nan's NPI, 1477837862, was assigned on October 4, 2011. Tamara O'Nan holds California license PA21869.
- NPI
- 1477837862NPI Registry (opens in a new tab)
- NPI enumeration date
- October 4, 2011
- NPI status
- Active
- Practice phone
- (949) 945-0927
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Tamara A. O'Nan practices at Allied Psychiatry and Mental Health in Newport Beach, California
Tamara O'Nan's primary practice is Allied Psychiatry and Mental Health, at 5020 Campus Dr, Newport Beach, CA 92660 in Orange County. The practice phone is (949) 945-0927.
- Allied Psychiatry and Mental Health5020 Campus Dr, Newport Beach, CA 92660 · Orange CountyPhone(949) 945-0927
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Tamara A. O'Nan is affiliated with 2 sites of care and 1 medical group
Tamara O'Nan's primary practice is Allied Psychiatry and Mental Health in Newport Beach, California. The medical group on file is Allied Psychiatry and Mental Health. Dmand AI also links Tamara O'Nan to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Tamara A. O'Nan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tamara O'Nan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Allied Psychiatry and Mental Health | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Tamara A. O'Nan is one of 11,482 physician assistants in California
Physician assistant is Tamara O'Nan's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Tamara O'Nan is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Tamara O'Nan
Counts of physician assistants 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
Tamara A. O'Nan's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Tamara O'Nan's median patient age at 73, with 53% women.
Tamara O'Nan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women53%
- Men42%
Source: Dmand AI Patient Panel Data
Tamara A. O'Nan wrote 1,016 Medicare Part D claims in 2024
In 2024, Tamara O'Nan wrote 1,016 Medicare Part D claims for 65 patients. 93% of them were for generic drugs.
Tamara O'Nan's Part D claims by kind of drug, 2024
- Generic949 claims93%
- Brand-name67 claims7%
Drug classes CMS tracks in Tamara O'Nan's Part D claims, 2024
- Antipsychotics, patients 65 and over14%143 of 1,016 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Tamara A. O'Nan received $2,080 in industry payments in 2025
CMS Open Payments shows 87 general payments to Tamara O'Nan from 22 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Vanda Pharmaceuticals Inc. paid the most, $330.
Companies that paid Tamara O'Nan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Tamara A. O'Nan'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 Tamara A. O'Nan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tamara A. O'Nan's NPI number?
Tamara A. O'Nan's NPI number is 1477837862. It was assigned on October 4, 2011, and it is active in the NPI Registry.
What does Tamara A. O'Nan specialize in?
Tamara A. O'Nan is a physician assistant in Newport Beach, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Tamara A. O'Nan practice?
Tamara O'Nan practices at 5020 Campus Dr, Newport Beach, CA 92660. Tamara O'Nan's primary practice is Allied Psychiatry and Mental Health in Newport Beach, California. Dmand AI also links Tamara O'Nan to 1 group practice or clinic.
What is Tamara A. O'Nan's office phone number?
The practice phone on file for Tamara O'Nan is (949) 945-0927.
What is Tamara A. O'Nan's medical license number?
Tamara O'Nan holds California license PA21869, one of 2 state licenses on file.
What medical group is Tamara A. O'Nan part of?
Tamara O'Nan is linked to Allied Psychiatry and Mental Health.
Has Tamara A. O'Nan received payments from drug or device companies?
CMS Open Payments shows $2,080 in general payments to Tamara O'Nan from 22 companies from 2025 to 2025. The largest total came from Vanda Pharmaceuticals Inc.
How long has Tamara A. O'Nan been practicing?
Tamara O'Nan graduated from medical school in 2011, 15 years ago.
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