Healthcare provider profile · identity verified

Thomas G Ahn, MD

Allopathic & Osteopathic Physicians|Internal Medicine · LOS ANGELES, CA · NPI 1669556866

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 Thomas G Ahn, MD received $2,565.44 in general payments during 2025 across 115 reported records.

ABBVIE INC. accounted for 12.2% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 36 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Jardiance, Ozempic, Paxlovid.

ABBVIE 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 SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 251 claims for Synthroid by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Farxiga by this doctor in 2024.

Boehringer Ingelheim 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 86 claims for Jardiance by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 86 claims for Jardiance by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 109 claims for Mounjaro by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Trulicity by this doctor in 2024.

Novo Nordisk 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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 89 claims for Ozempic by this doctor in 2024.

PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Eliquis by this doctor in 2024.

PFIZER 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 PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 41 claims for Paxlovid by this doctor in 2024.

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

Payment overview · 2025

General Payments

$2,565.44

115 reported records · 29 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
ABBVIE INC. Unresolved — no canonical attribution shown $313.6812.2%202025
Mannkind Corporation Unresolved — no canonical attribution shown $264.6910.3%132025
Novo Nordisk Inc Unresolved — no canonical attribution shown $253.149.9%112025
BETA BIONICS, INC. Unresolved — no canonical attribution shown $206.118.0%52025
Ardelyx, Inc. Unresolved — no canonical attribution shown $201.547.9%102025
IBSA Pharma Inc. Unresolved — no canonical attribution shown $192.147.5%102025
Dexcom, Inc. Unresolved — no canonical attribution shown $118.074.6%42025
AKEBIA THERAPEUTICS INC Unresolved — no canonical attribution shown $105.084.1%42025
Amgen Inc. Unresolved — no canonical attribution shown $96.223.8%42025
Abbott Laboratories Unresolved — no canonical attribution shown $89.503.5%32025
Ascendis Pharma Endocrinology Inc Unresolved — no canonical attribution shown $83.133.2%32025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $82.503.2%32025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $72.812.8%32025
Madrigal Pharmaceuticals Unresolved — no canonical attribution shown $49.471.9%22025
PFIZER INC. Unresolved — no canonical attribution shown $46.471.8%22025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $44.811.8%22025
OPKO Pharmaceuticals, LLC Unresolved — no canonical attribution shown $39.211.5%22025
Verity Pharmaceuticals Inc. Unresolved — no canonical attribution shown $34.821.4%12025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $33.761.3%22025
Xeris Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $33.521.3%22025
Tanabe Pharma America, Inc. Unresolved — no canonical attribution shown $29.471.1%12025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $29.021.1%12025
Tandem Diabetes Care, Inc. Unresolved — no canonical attribution shown $23.850.9%12025
Calliditas Therapeutics US Inc. Unresolved — no canonical attribution shown $23.140.9%12025
Boston Scientific Corporation Unresolved — no canonical attribution shown $21.670.8%12025
KYOWA KIRIN, INC. Unresolved — no canonical attribution shown $21.440.8%12025
Lilly USA, LLC Unresolved — no canonical attribution shown $20.680.8%12025
Seqirus USA Inc Unresolved — no canonical attribution shown $17.790.7%12025
IRONWOOD PHARMACEUTICALS, INC Unresolved — no canonical attribution shown $17.710.7%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$2,565.44115

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
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $272.76 17 2025
Source payment records
AFREZZA
Normalized: afrezza
Drug Mannkind Corporation $264.69 13 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $253.14 11 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $230.51 10 2025
Source payment records
iLet Bionic Pancreas
Normalized: ilet bionic pancreas
Device BETA BIONICS, INC. $206.11 5 2025
Source payment records
iLet Insulin Infusion Kit Contact Detach
Normalized: ilet insulin infusion kit contact detach
Device BETA BIONICS, INC. $206.11 5 2025
Source payment records
iLet Insulin Infusion Kit Inset
Normalized: ilet insulin infusion kit inset
Device BETA BIONICS, INC. $206.11 5 2025
Source payment records
IBSRELA
Normalized: ibsrela
Drug Ardelyx, Inc. $201.54 10 2025
Source payment records
Flector
Normalized: flector
Drug IBSA Pharma Inc. $192.14 10 2025
Source payment records
Licart
Normalized: licart
Drug IBSA Pharma Inc. $192.14 10 2025
Source payment records
Tirosint
Normalized: tirosint
Drug IBSA Pharma Inc. $192.14 10 2025
Source payment records
Dexcom G6 Transmitter
Normalized: dexcom g6 transmitter
Medical Supply Dexcom, Inc. $118.07 4 2025
Source payment records
Vafseo
Normalized: vafseo
Drug AKEBIA THERAPEUTICS INC $105.08 4 2025
Source payment records
TEPEZZA
Normalized: tepezza
Biological Amgen Inc. $96.22 4 2025
Source payment records
FREESTYLE LIBRE 3
Normalized: freestyle libre 3
Device Abbott Laboratories $89.50 3 2025
Source payment records
Yorvipath
Normalized: yorvipath
Drug Ascendis Pharma Endocrinology Inc $83.13 3 2025
Source payment records
LEQVIO
Normalized: leqvio
Drug Novartis Pharmaceuticals Corporation $82.50 3 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $62.17 4 2025
Source payment records
REZDIFFRA
Normalized: rezdiffra
Drug Madrigal Pharmaceuticals $49.47 2 2025
Source payment records
RAYALDEE
Normalized: rayaldee
Drug OPKO Pharmaceuticals, LLC $39.21 2 2025
Source payment records
Tlando
Normalized: tlando
Drug Verity Pharmaceuticals Inc. $34.82 1 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $33.76 2 2025
Source payment records
GVOKE HYPOPEN
Normalized: gvoke hypopen
Drug Xeris Pharmaceuticals, Inc. $33.52 2 2025
Source payment records
Radicava
Normalized: radicava
Drug Tanabe Pharma America, Inc. $29.47 1 2025
Source payment records
JYNARQUE
Normalized: jynarque
Drug Otsuka America Pharmaceutical, Inc. $29.02 1 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $29.00 1 2025
Source payment records
ZAVZPRET
Normalized: zavzpret
Drug PFIZER INC. $29.00 1 2025
Source payment records
t:slim X2 Insulin Pump with Control-IQ
Normalized: t slim x2 insulin pump with control iq
Device Tandem Diabetes Care, Inc. $23.85 1 2025
Source payment records
TARPEYO
Normalized: tarpeyo
Drug Calliditas Therapeutics US Inc. $23.14 1 2025
Source payment records
General - Pain Management
Normalized: general pain management
Device Boston Scientific Corporation $21.67 1 2025
Source payment records
CRYSVITA
Normalized: crysvita
Drug KYOWA KIRIN, INC. $21.44 1 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Lilly USA, LLC $20.68 1 2025
Source payment records
Fluad
Normalized: fluad
Biological Seqirus USA Inc $17.79 1 2025
Source payment records
Flucelvax
Normalized: flucelvax
Biological Seqirus USA Inc $17.79 1 2025
Source payment records
Linzess
Normalized: linzess
Drug IRONWOOD PHARMACEUTICALS, INC $17.71 1 2025
Source payment records
PAXLOVID
Normalized: paxlovid
Drug PFIZER INC. $17.47 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
JARDIANCE
jardiance
2025 Jardiance 2024 86 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 89 exact normalized Medicare Part D
PAXLOVID
paxlovid
2025 Paxlovid 2024 41 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
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
251 53
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 FARXIGA
open payments reported associated product
CMS Open Payments — General Payments
106133 supporting records · 42906 recipient NPIs · example record 1206131362
Farxiga · 2024
Exact normalized brand match · 1 Part D row
24 suppressed by CMS
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
123636 supporting records · 49438 recipient NPIs · example record 1221811583
Jardiance · 2024
Exact normalized brand match · 1 Part D row
86 16
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
86 16
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
109 17
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
18 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
89 15
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
87112 supporting records · 36032 recipient NPIs · example record 1228794063
Eliquis · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 PAXLOVID
open payments reported associated product
CMS Open Payments — General Payments
24465 supporting records · 15715 recipient NPIs · example record 1228794432
Paxlovid · 2024
Exact normalized brand match · 1 Part D row
41 37

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
Levothyroxine SodiumLevothyroxine Sodium36791
Rosuvastatin CalciumRosuvastatin Calcium29485
Atorvastatin CalciumAtorvastatin Calcium26076
SynthroidLevothyroxine Sodium25153
Amlodipine BesylateAmlodipine Besylate14941
Zolpidem TartrateZolpidem Tartrate13228
Losartan PotassiumLosartan Potassium13039
Metformin HclMetformin Hcl11733
MounjaroTirzepatide10917
Metoprolol SuccinateMetoprolol Succinate9822
LorazepamLorazepam9223
Escitalopram OxalateEscitalopram Oxalate9023
OzempicSemaglutide8915
JardianceEmpagliflozin8616
AllopurinolAllopurinol7519
AlprazolamAlprazolam7124
GabapentinGabapentin7016
AzithromycinAzithromycin6754
EszopicloneEszopiclone64suppressed
JanuviaSitagliptin Phosphate6312
HydrochlorothiazideHydrochlorothiazide5618
Nano 2nd Gen Pen NeedlePen Needle, Diabetic5516
Pantoprazole SodiumPantoprazole Sodium4911
SimvastatinSimvastatin4714
Trazodone HclTrazodone Hcl45suppressed
OmeprazoleOmeprazole4212
Tresiba Flextouch U-200Insulin Degludec42suppressed
Citalopram HbrCitalopram Hydrobromide41suppressed
PaxlovidNirmatrelvir/Ritonavir4137
Sertraline HclSertraline Hcl41suppressed
EzetimibeEzetimibe3612
Lantus SolostarInsulin Glargine,hum.Rec.Anlog3611
Novolog FlexpenInsulin Aspart36suppressed
Olmesartan MedoxomilOlmesartan Medoxomil36suppressed
Tamsulosin HclTamsulosin Hcl36suppressed
IrbesartanIrbesartan35suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide34suppressed
Alendronate SodiumAlendronate Sodium28suppressed
TemazepamTemazepam27suppressed
Repatha SureclickEvolocumab26suppressed
CelecoxibCelecoxib2511
Duloxetine HclDuloxetine Hcl25suppressed
FarxigaDapagliflozin Propanediol24suppressed
LisinoprilLisinopril24suppressed
ValsartanValsartan23suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog22suppressed
ValacyclovirValacyclovir Hcl2216
DiazepamDiazepam21suppressed
Pravastatin SodiumPravastatin Sodium21suppressed
FamotidineFamotidine20suppressed
Humalog Kwikpen U-100Insulin Lispro20suppressed
Albuterol Sulfate HfaAlbuterol Sulfate19suppressed
Dexlansoprazole DrDexlansoprazole19suppressed
FinasterideFinasteride19suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen19suppressed
RamiprilRamipril19suppressed
Pioglitazone HclPioglitazone Hcl18suppressed
TrulicityDulaglutide18suppressed
Sumatriptan SuccinateSumatriptan Succinate17suppressed
TelmisartanTelmisartan17suppressed
Tresiba Flextouch U-100Insulin Degludec17suppressed
AcyclovirAcyclovir16suppressed
Bupropion XlBupropion Hcl16suppressed
ClopidogrelClopidogrel Bisulfate16suppressed
Trijardy XrEmpaglifloz/Linaglip/Metformin16suppressed
ClonazepamClonazepam15suppressed
FurosemideFurosemide15suppressed
MethocarbamolMethocarbamol15suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine14suppressed
Fiasp FlextouchInsulin Aspart (Niacinamide)14suppressed
Humalog Kwikpen U-200Insulin Lispro14suppressed
Humulin R U-500 KwikpenInsulin Regular, Human14suppressed
MyrbetriqMirabegron14suppressed
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide14suppressed
Potassium ChloridePotassium Chloride14suppressed
Amitriptyline HclAmitriptyline Hcl13suppressed
AtenololAtenolol13suppressed
GemfibrozilGemfibrozil13suppressed
Liothyronine SodiumLiothyronine Sodium13suppressed
Metformin Hcl ErMetformin Hcl13suppressed
Ondansetron OdtOndansetron1311
Selegiline HclSelegiline Hcl13suppressed
Alfuzosin Hcl ErAlfuzosin Hcl12suppressed
ChlorthalidoneChlorthalidone12suppressed
Droplet Pen NeedlePen Needle, Diabetic12suppressed
EliquisApixaban12suppressed
Fluoxetine HclFluoxetine Hcl12suppressed
JanumetSitagliptin Phos/Metformin Hcl12suppressed
Potassium Citrate ErPotassium Citrate12suppressed
RizatriptanRizatriptan Benzoate12suppressed
Soliqua 100-33Insulin Glargine/Lixisenatide12suppressed
Testosterone CypionateTestosterone Cypionate12suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid12suppressed
Montelukast SodiumMontelukast Sodium11suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog11suppressed
Venlafaxine Hcl ErVenlafaxine Hcl11suppressed
Xigduo XrDapaglifloz Propaned/Metformin11suppressed

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 $2,565.44 · 115 records ABBVIE INC. AFREZZA, CRYSVITA, Dexcom G6 Transmitter, FREESTYLE LIBRE 3, Flector, Fluad, Flucelvax, GVOKE HYPOPEN, General - Pain Management, IBSRELA, JARDIANCE, JYNARQUE, Kerendia, LEQVIO, Licart, Linzess, NURTEC ODT, Ozempic, PAXLOVID, QULIPTA, RAYALDEE, REZDIFFRA, Radicava, Rybelsus, TARPEYO, TEPEZZA, Tirosint, Tlando, UBRELVY, Vafseo, Yorvipath, ZAVZPRET, iLet Bionic Pancreas, iLet Insulin Infusion Kit Contact Detach, iLet Insulin Infusion Kit Inset, t:slim X2 Insulin Pump with Control-IQ 9
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