Payment overview · 2025
General Payments
$1,592.11
66 reported records · 36 companies
Healthcare provider profile · identity verified
Michael Paul Kellam, M.D.
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · PLANO, TX · NPI 1689789950
Verified facts
What the public records show
CMS Open Payments records show Michael Paul Kellam, M.D. received $1,592.11 in general payments during 2025 across 66 reported records.
ABBVIE INC. accounted for 11.6% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 40 associated products.
Amneal Pharmaceuticals 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 RYTARY as an associated drug or biological on 200 records involving 121 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Rytary by this doctor in 2024.
Otsuka America Pharmaceutical, 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 NUEDEXTA as an associated drug or biological on 393 records involving 285 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Nuedexta by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
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 company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| ABBVIE INC. | Unresolved — no canonical attribution shown | $184.96 | 11.6% | 10 | 2025 |
| UCB, Inc. | Unresolved — no canonical attribution shown | $106.54 | 6.7% | 3 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $99.25 | 6.2% | 4 | 2025 |
| MDD US Operations, LLC | Unresolved — no canonical attribution shown | $69.48 | 4.4% | 3 | 2025 |
| SK Life Science, Inc. |
SK Life Science, Inc. exact · evidence 2025-04-03 |
$68.30 | 4.3% | 2 | 2025 |
| Teva Pharmaceuticals USA, Inc. | Unresolved — no canonical attribution shown | $65.11 | 4.1% | 2 | 2025 |
| Mallinckrodt Hospital Products Inc. | Unresolved — no canonical attribution shown | $60.10 | 3.8% | 3 | 2025 |
| Biogen, Inc. | Unresolved — no canonical attribution shown | $59.66 | 3.8% | 2 | 2025 |
| Genentech USA, Inc. | Unresolved — no canonical attribution shown | $57.29 | 3.6% | 2 | 2025 |
| Eisai Inc. | Unresolved — no canonical attribution shown | $55.65 | 3.5% | 2 | 2025 |
| Grifols USA, LLC | Unresolved — no canonical attribution shown | $48.85 | 3.1% | 2 | 2025 |
| ARGENX US, INC. | Unresolved — no canonical attribution shown | $46.98 | 3.0% | 2 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $46.12 | 2.9% | 2 | 2025 |
| Axsome Therapeutics, Inc. | Unresolved — no canonical attribution shown | $46.00 | 2.9% | 2 | 2025 |
| Neurocrine BioSciences, Inc. | Unresolved — no canonical attribution shown | $44.74 | 2.8% | 2 | 2025 |
| Celgene Corporation | Unresolved — no canonical attribution shown | $40.34 | 2.5% | 2 | 2025 |
| JAZZ PHARMACEUTICALS INC. | Unresolved — no canonical attribution shown | $34.83 | 2.2% | 2 | 2025 |
| ANI Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $33.10 | 2.1% | 1 | 2025 |
| CSL Behring | Unresolved — no canonical attribution shown | $33.02 | 2.1% | 1 | 2025 |
| EMD Serono, Inc. | Unresolved — no canonical attribution shown | $33.00 | 2.1% | 1 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $31.39 | 2.0% | 1 | 2025 |
| TG Therapeutics, Inc. | Unresolved — no canonical attribution shown | $30.39 | 1.9% | 1 | 2025 |
| Amneal Pharmaceuticals LLC | Unresolved — no canonical attribution shown | $26.79 | 1.7% | 1 | 2025 |
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $26.58 | 1.7% | 1 | 2025 |
| HARMONY BIOSCIENCES LLC | Unresolved — no canonical attribution shown | $25.94 | 1.6% | 1 | 2025 |
| Neurelis, Inc. |
Neurelis, Inc. exact · evidence 2025-02-20 |
$24.18 | 1.5% | 1 | 2025 |
| ACADIA Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $23.34 | 1.5% | 1 | 2025 |
| MicroTransponder, Inc. | Unresolved — no canonical attribution shown | $22.38 | 1.4% | 1 | 2025 |
| GE HEALTHCARE | Unresolved — no canonical attribution shown | $21.55 | 1.4% | 1 | 2025 |
| Tanabe Pharma America, Inc. | Unresolved — no canonical attribution shown | $21.26 | 1.3% | 1 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $21.22 | 1.3% | 1 | 2025 |
| Abbott Laboratories | Unresolved — no canonical attribution shown | $18.40 | 1.2% | 1 | 2025 |
| Otsuka America Pharmaceutical, Inc. | Unresolved — no canonical attribution shown | $17.35 | 1.1% | 1 | 2025 |
| Azurity Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $17.22 | 1.1% | 1 | 2025 |
| SCILEX PHARMACEUTICALS INC. | Unresolved — no canonical attribution shown | $15.67 | 1.0% | 1 | 2025 |
| Tonix Medicines, Inc. | Unresolved — no canonical attribution shown | $15.13 | 0.9% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $1,592.11 | 66 |
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 product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| QULIPTA Normalized: qulipta |
Drug | ABBVIE INC. | $93.66 | 5 | 2025 |
Source payment records
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| VYALEV Normalized: vyalev |
Drug | ABBVIE INC. | $88.56 | 3 | 2025 |
Source payment records
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| AUSTEDO XR Normalized: austedo xr |
Drug | Teva Pharmaceuticals USA, Inc. | $65.11 | 2 | 2025 |
Source payment records
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| UBRELVY Normalized: ubrelvy |
Drug | ABBVIE INC. | $60.75 | 3 | 2025 |
Source payment records
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| ACTHAR Normalized: acthar |
Biological | Mallinckrodt Hospital Products Inc. | $60.10 | 3 | 2025 |
Source payment records
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| VUMERITY Normalized: vumerity |
Drug | Biogen, Inc. | $59.66 | 2 | 2025 |
Source payment records
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| Ocrevus Zunovo Normalized: ocrevus zunovo |
Biological | Genentech USA, Inc. | $57.29 | 2 | 2025 |
Source payment records
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| EMGALITY Normalized: emgality |
Drug | Lilly USA, LLC | $57.01 | 2 | 2025 |
Source payment records
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| Leqembi Normalized: leqembi |
Drug | Eisai Inc. | $55.65 | 2 | 2025 |
Source payment records
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| Gamunex-C Normalized: gamunex c |
Biological | Grifols USA, LLC | $48.85 | 2 | 2025 |
Source payment records
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| Rystiggo Normalized: rystiggo |
Drug | UCB, Inc. | $47.53 | 1 | 2025 |
Source payment records
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| VYVGART HYTRULO Normalized: vyvgart hytrulo |
Drug | ARGENX US, INC. | $46.98 | 2 | 2025 |
Source payment records
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $46.12 | 2 | 2025 |
Source payment records
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| INGREZZA Normalized: ingrezza |
Drug | Neurocrine BioSciences, Inc. | $44.74 | 2 | 2025 |
Source payment records
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| KISUNLA Normalized: kisunla |
Drug | Lilly USA, LLC | $42.24 | 2 | 2025 |
Source payment records
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| ZEPOSIA Normalized: zeposia |
Drug | Celgene Corporation | $40.34 | 2 | 2025 |
Source payment records
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| BOTOX Normalized: botox |
Biological | ABBVIE INC. | $35.65 | 4 | 2025 |
Source payment records
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| XYWAV Normalized: xywav |
Drug | JAZZ PHARMACEUTICALS INC. | $34.83 | 2 | 2025 |
Source payment records
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| PURIFIED CORTROPHIN GEL Normalized: purified cortrophin gel |
Drug | ANI Pharmaceuticals, Inc. | $33.10 | 1 | 2025 |
Source payment records
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| Hizentra Normalized: hizentra |
Biological | CSL Behring | $33.02 | 1 | 2025 |
Source payment records
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| Privigen Normalized: privigen |
Biological | CSL Behring | $33.02 | 1 | 2025 |
Source payment records
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| KESIMPTA Normalized: kesimpta |
Drug | Novartis Pharmaceuticals Corporation | $31.39 | 1 | 2025 |
Source payment records
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| BRIUMVI Normalized: briumvi |
Drug | TG Therapeutics, Inc. | $30.39 | 1 | 2025 |
Source payment records
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| Nayzilam Normalized: nayzilam |
Drug | UCB, Inc. | $29.61 | 1 | 2025 |
Source payment records
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| Fintepla Normalized: fintepla |
Drug | UCB, Inc. | $29.40 | 1 | 2025 |
Source payment records
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| Symbravo Normalized: symbravo |
Drug | Axsome Therapeutics, Inc. | $28.31 | 1 | 2025 |
Source payment records
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $27.95 | 1 | 2025 |
Source payment records
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| CREXONT Normalized: crexont |
Drug | Amneal Pharmaceuticals LLC | $26.79 | 1 | 2025 |
Source payment records
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| WAKIX Normalized: wakix |
Drug | HARMONY BIOSCIENCES LLC | $25.94 | 1 | 2025 |
Source payment records
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| VALTOCO Normalized: valtoco |
Drug | Neurelis, Inc. | $24.18 | 1 | 2025 |
Source payment records
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| Gocovri Normalized: gocovri |
Drug | MDD US Operations, LLC | $23.73 | 1 | 2025 |
Source payment records
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| NUPLAZID Normalized: nuplazid |
Drug | ACADIA Pharmaceuticals Inc | $23.34 | 1 | 2025 |
Source payment records
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| AMYVID Normalized: amyvid |
Drug | Lilly USA, LLC | $21.88 | 1 | 2025 |
Source payment records
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| Radicava Normalized: radicava |
Drug | Tanabe Pharma America, Inc. | $21.26 | 1 | 2025 |
Source payment records
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| INFINITY Normalized: infinity |
Device | Abbott Laboratories | $18.40 | 1 | 2025 |
Source payment records
|
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| Sunosi Normalized: sunosi |
Drug | Axsome Therapeutics, Inc. | $17.69 | 1 | 2025 |
Source payment records
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| REXULTI Normalized: rexulti |
Drug | Otsuka America Pharmaceutical, Inc. | $17.35 | 1 | 2025 |
Source payment records
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| HORIZANT Normalized: horizant |
Drug | Azurity Pharmaceuticals, Inc. | $17.22 | 1 | 2025 |
Source payment records
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| ZTLido Normalized: ztlido |
Drug | SCILEX PHARMACEUTICALS INC. | $15.67 | 1 | 2025 |
Source payment records
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| ZEMBRACE SYMTOUCH Normalized: zembrace symtouch |
Drug | Tonix Medicines, Inc. | $15.13 | 1 | 2025 |
Source payment records
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* 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
No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.
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 company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| Amneal Pharmaceuticals LLC Exact reporting entity; no affiliate inference |
2025 | RYTARY open payments reported associated product |
CMS Open Payments — General Payments 200 supporting records · 121 recipient NPIs · example record 1220526035 |
Rytary · 2024 Exact normalized brand match · 1 Part D row |
16 | suppressed by CMS |
| Otsuka America Pharmaceutical, Inc. Exact reporting entity; no affiliate inference |
2025 | NUEDEXTA open payments reported associated product |
CMS Open Payments — General Payments 393 supporting records · 285 recipient NPIs · example record 1227268901 |
Nuedexta · 2024 Exact normalized brand match · 1 Part D row |
12 | 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
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Gabapentin | Gabapentin | 200 | 57 |
| Memantine Hcl | Memantine Hcl | 182 | 47 |
| Donepezil Hcl | Donepezil Hcl | 125 | 32 |
| Duloxetine Hcl | Duloxetine Hcl | 119 | 27 |
| Clonazepam | Clonazepam | 114 | 20 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 108 | 26 |
| Pregabalin | Pregabalin | 103 | 25 |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 95 | 19 |
| Belsomra | Suvorexant | 82 | 14 |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 73 | 17 |
| Tizanidine Hcl | Tizanidine Hcl | 72 | 18 |
| Levetiracetam | Levetiracetam | 67 | 23 |
| Temazepam | Temazepam | 51 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 50 | 15 |
| Trazodone Hcl | Trazodone Hcl | 49 | 17 |
| Topiramate | Topiramate | 48 | 16 |
| Primidone | Primidone | 44 | 14 |
| Mirtazapine | Mirtazapine | 43 | 14 |
| Tramadol Hcl | Tramadol Hcl | 43 | suppressed |
| Galantamine Er | Galantamine Hbr | 42 | 12 |
| Ropinirole Hcl | Ropinirole Hcl | 41 | 13 |
| Escitalopram Oxalate | Escitalopram Oxalate | 40 | suppressed |
| Sertraline Hcl | Sertraline Hcl | 38 | suppressed |
| Bupropion Xl | Bupropion Hcl | 35 | suppressed |
| Lamotrigine | Lamotrigine | 30 | suppressed |
| Rizatriptan | Rizatriptan Benzoate | 30 | suppressed |
| Rasagiline Mesylate | Rasagiline Mesylate | 29 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 29 | suppressed |
| Eszopiclone | Eszopiclone | 28 | suppressed |
| Baclofen | Baclofen | 24 | 11 |
| Modafinil | Modafinil | 20 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 20 | suppressed |
| Adlarity | Donepezil Hcl | 19 | suppressed |
| Meloxicam | Meloxicam | 19 | suppressed |
| Pentoxifylline | Pentoxifylline | 19 | suppressed |
| Butalbital-Acetaminophen-Caffe | Butalb/Acetaminophen/Caffeine | 18 | suppressed |
| Memantine Hcl Er | Memantine Hcl | 18 | suppressed |
| Rivastigmine | Rivastigmine Tartrate | 17 | suppressed |
| Quetiapine Fumarate | Quetiapine Fumarate | 16 | suppressed |
| Rytary | Carbidopa/Levodopa | 16 | suppressed |
| Verapamil Er | Verapamil Hcl | 16 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 15 | suppressed |
| Venlafaxine Hcl | Venlafaxine Hcl | 15 | suppressed |
| Alprazolam | Alprazolam | 14 | suppressed |
| Butorphanol Tartrate | Butorphanol Tartrate | 14 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 14 | suppressed |
| Prednisone | Prednisone | 14 | suppressed |
| Diazepam | Diazepam | 13 | suppressed |
| Armodafinil | Armodafinil | 12 | suppressed |
| Droxidopa | Droxidopa | 12 | suppressed |
| Emgality Syringe | Galcanezumab-Gnlm | 12 | suppressed |
| Nuedexta | Dextromethorphan Hbr/Quinidine | 12 | suppressed |
| Zonisamide | Zonisamide | 12 | suppressed |
| Amantadine | Amantadine Hcl | 11 | suppressed |
| Carbidopa-Levodopa-Entacapone | Carbidopa/Levodopa/Entacapone | 11 | suppressed |
| Desvenlafaxine Succinate Er | Desvenlafaxine Succinate | 11 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 11 | suppressed |
| Nourianz | Istradefylline | 11 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 11 | suppressed |
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.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $1,592.11 · 66 records | ABBVIE INC. | ACTHAR, AMYVID, AUSTEDO XR, BOTOX, BRIUMVI, CREXONT, EMGALITY, Fintepla, Gamunex-C, Gocovri, HORIZANT, Hizentra, INFINITY, INGREZZA, KESIMPTA, KISUNLA, Leqembi, NUPLAZID, NURTEC ODT, Nayzilam, Ocrevus Zunovo, PURIFIED CORTROPHIN GEL, Privigen, QULIPTA, REXULTI, Radicava, Rystiggo, Sunosi, Symbravo, UBRELVY, VALTOCO, VUMERITY, VYALEV, VYVGART HYTRULO, WAKIX, XYWAV, ZAVZPRET, ZEMBRACE SYMTOUCH, ZEPOSIA, ZTLido | 2 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- How do you evaluate evidence when you have a financial relationship with Amneal Pharmaceuticals LLC?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| 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 |
Full methodology · Questions & answers · Report a possible error