Healthcare provider profile · identity verified

Tamara O'Nan, PA-C

Physician Assistants & Advanced Practice Nursing Providers|Physician Assistant · NEWPORT BEACH, CA · NPI 1477837862

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show Tamara O'Nan, PA-C received $4,881.26 in general payments during 2025 across 200 reported records.

ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) accounted for 12.4% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 27 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Spravato.

Janssen Pharmaceuticals, Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SPRAVATO as an associated drug or biological on 43813 records involving 17025 distinct recipient NPIs. Public Medicare Part D data also shows 31 claims for Spravato by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$4,881.26

200 reported records · 23 companies

Separate record types

Research & Ownership

Research Payments (direct recipient): not present in the loaded data

Associated Research Funding (for example, named PI): not present in the loaded data

Ownership / Investment: not present in the loaded data

These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $607.3012.4%292025
Vanda Pharmaceuticals Inc. Unresolved — no canonical attribution shown $581.3711.9%172025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $489.2210.0%162025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $382.147.8%102025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $336.946.9%72025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $336.376.9%162025
ABBVIE INC. Unresolved — no canonical attribution shown $258.435.3%162025
Noven Therapeutics, LLC Unresolved — no canonical attribution shown $239.784.9%112025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $237.934.9%112025
Alkermes, Inc. Unresolved — no canonical attribution shown $232.044.8%112025
Tris Pharma Inc Unresolved — no canonical attribution shown $226.984.7%62025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $192.784.0%122025
Lundbeck LLC Unresolved — no canonical attribution shown $170.693.5%92025
Collegium Pharmaceutical, Inc. Unresolved — no canonical attribution shown $106.862.2%52025
Indivior Inc. Unresolved — no canonical attribution shown $85.811.8%42025
Supernus Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $83.361.7%42025
Bausch Health US, LLC Unresolved — no canonical attribution shown $65.231.3%32025
Lilly USA, LLC Unresolved — no canonical attribution shown $64.351.3%32025
Novo Nordisk Inc Unresolved — no canonical attribution shown $48.261.0%22025
Takeda Pharmaceuticals U.S.A., Inc. Unresolved — no canonical attribution shown $44.050.9%32025
OWP Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $42.970.9%22025
Neos Therapeutics, LP Unresolved — no canonical attribution shown $30.640.6%22025
Braeburn Inc. Unresolved — no canonical attribution shown $17.760.4%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$4,881.26200

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $607.30 29 2025
Source payment records
FANAPT
Normalized: fanapt
Drug Vanda Pharmaceuticals Inc. $581.37 17 2025
Source payment records
HETLIOZ
Normalized: hetlioz
Drug Vanda Pharmaceuticals Inc. $493.43 13 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $489.22 16 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $382.14 10 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $336.37 16 2025
Source payment records
SPRAVATO
Normalized: spravato
Drug Janssen Pharmaceuticals, Inc $312.35 6 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $258.43 16 2025
Source payment records
Xelstrym
Normalized: xelstrym
Drug Noven Therapeutics, LLC $239.78 11 2025
Source payment records
LYBALVI
Normalized: lybalvi
Drug Alkermes, Inc. $232.04 11 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $228.05 12 2025
Source payment records
Dyanavel XR
Normalized: dyanavel xr
Drug Tris Pharma Inc $226.98 6 2025
Source payment records
ARISTADA
Normalized: aristada
Drug Alkermes, Inc. $202.42 10 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $192.78 12 2025
Source payment records
ABILIFY ASIMTUFII
Normalized: abilify asimtufii
Drug Otsuka America Pharmaceutical, Inc. $173.41 7 2025
Source payment records
Jornay PM
Normalized: jornay pm
Drug Collegium Pharmaceutical, Inc. $106.86 5 2025
Source payment records
SUBLOCADE
Normalized: sublocade
Drug Indivior Inc. $85.81 4 2025
Source payment records
APLENZIN
Normalized: aplenzin
Drug Bausch Health US, LLC $65.23 3 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $64.35 3 2025
Source payment records
TRINTELLIX
Normalized: trintellix
Drug Takeda Pharmaceuticals U.S.A., Inc. $44.05 3 2025
Source payment records
Subvenite
Normalized: subvenite
Drug OWP Pharmaceuticals, Inc. $42.97 2 2025
Source payment records
Cotempla XR-ODT
Normalized: cotempla xr odt
Drug Neos Therapeutics, LP $30.64 2 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $26.01 1 2025
Source payment records
INVEGA SUSTENNA
Normalized: invega sustenna
Drug Janssen Pharmaceuticals, Inc $24.59 1 2025
Source payment records
WELLBUTRIN
Normalized: wellbutrin
Drug Bausch Health US, LLC $22.87 1 2025
Source payment records
BRIXADI
Normalized: brixadi
Drug Braeburn Inc. $17.76 1 2025
Source payment records
ABILIFY MAINTENA
Normalized: abilify maintena
Drug Otsuka America Pharmaceutical, Inc. $7.16 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
SPRAVATO
spravato
2025 Spravato 2024 31
Beneficiary count suppressed
exact normalized Medicare Part D

The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.

Analysis 2 · Same-company prescribing overlap

Drugs reported in other payments from the same company that also appear in Medicare Part D

This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
Janssen Pharmaceuticals, Inc
Exact reporting entity; no affiliate inference
2025 SPRAVATO
open payments reported associated product
CMS Open Payments — General Payments
43813 supporting records · 17025 recipient NPIs · example record 1174223254
Spravato · 2024
Exact normalized brand match · 1 Part D row
31 suppressed by CMS

These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.

Public Medicare Part D data

Provider-and-drug rows loaded for 2024

BrandGenericClaimsBeneficiaries
Quetiapine FumarateQuetiapine Fumarate9314
ClonazepamClonazepam9215
LamotrigineLamotrigine7414
Duloxetine HclDuloxetine Hcl41suppressed
Lurasidone HclLurasidone Hcl37suppressed
Trazodone HclTrazodone Hcl37suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine34suppressed
Divalproex SodiumDivalproex Sodium33suppressed
Escitalopram OxalateEscitalopram Oxalate31suppressed
SpravatoEsketamine Hcl31suppressed
GabapentinGabapentin28suppressed
Buprenorphine HclBuprenorphine Hcl26suppressed
Propranolol HclPropranolol Hcl25suppressed
AripiprazoleAripiprazole23suppressed
Fluoxetine HclFluoxetine Hcl23suppressed
LorazepamLorazepam23suppressed
Hydroxyzine HclHydroxyzine Hcl22suppressed
OlanzapineOlanzapine21suppressed
Dextroamphetamine-Amphet ErDextroamphetamine/Amphetamine20suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate19suppressed
TemazepamTemazepam18suppressed
Bupropion XlBupropion Hcl17suppressed
Fluvoxamine MaleateFluvoxamine Maleate17suppressed
Sertraline HclSertraline Hcl17suppressed
Bupropion Hcl SrBupropion Hcl16suppressed
Prazosin HclPrazosin Hcl16suppressed
Paroxetine HclParoxetine Hcl15suppressed
TopiramateTopiramate13suppressed
Naltrexone HclNaltrexone Hcl12suppressed

Timeline

Payment and prescribing data by year

Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $4,881.26 · 200 records ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) ABILIFY ASIMTUFII, ABILIFY MAINTENA, APLENZIN, ARISTADA, AUSTEDO XR, Auvelity, BRIXADI, CAPLYTA, COBENFY, Cotempla XR-ODT, Dyanavel XR, FANAPT, HETLIOZ, INGREZZA, INVEGA SUSTENNA, Jornay PM, LYBALVI, REXULTI, SPRAVATO, SUBLOCADE, Subvenite, TRINTELLIX, VRAYLAR, WELLBUTRIN, Wegovy, Xelstrym, ZEPBOUND 1
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
CMS Open Payments — General Payments 2025 2026-06-30 Original source
Medicare Part D Prescribers by Provider and Drug 2024 2026-05-06 Original source
NPPES Data Dissemination V2 current / reference data 2026-08-10 Original source

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error