Payment overview · 2025
General Payments
$427.49
17 reported records · 3 companies
Healthcare provider profile · identity verified
Diana Blum, MD
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · STANFORD, CA · NPI 1952599839
Verified facts
What the public records show
CMS Open Payments records show Diana Blum, MD received $427.49 in general payments during 2025 across 17 reported records.
MDD US Operations, LLC accounted for 61.8% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Rytary.
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 ONGENTYS as an associated drug or biological on 728 records involving 311 distinct recipient NPIs. Public Medicare Part D data also shows 70 claims for Ongentys by this doctor in 2024.
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 306 claims for Rytary by this doctor in 2024.
MDD US Operations, 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 Gocovri as an associated drug or biological on 3202 records involving 1029 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Gocovri by this doctor in 2024.
MDD US Operations, 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 Xadago as an associated drug or biological on 139 records involving 79 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Xadago 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 |
|---|---|---|---|---|---|
| MDD US Operations, LLC | Unresolved — no canonical attribution shown | $264.01 | 61.8% | 8 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $149.08 | 34.9% | 8 | 2025 |
| Amneal Pharmaceuticals LLC | Unresolved — no canonical attribution shown | $14.40 | 3.4% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $378.68 | 16 |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $48.81 | 1 |
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 |
|---|---|---|---|---|---|
| VYALEV Normalized: vyalev |
Drug | ABBVIE INC. | $149.08 | 8 | 2025 |
Source payment records
|
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| RYTARY Normalized: rytary |
Drug | Amneal Pharmaceuticals LLC | $14.40 | 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
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| RYTARY rytary |
2025 | Rytary | 2024 | 306 | 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 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 | ONGENTYS open payments reported associated product |
CMS Open Payments — General Payments 728 supporting records · 311 recipient NPIs · example record 1220525547 |
Ongentys · 2024 Exact normalized brand match · 1 Part D row |
70 | suppressed by CMS |
| 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 |
306 | 34 |
| MDD US Operations, LLC Exact reporting entity; no affiliate inference |
2025 | Gocovri open payments reported associated product |
CMS Open Payments — General Payments 3202 supporting records · 1029 recipient NPIs · example record 1241843637 |
Gocovri · 2024 Exact normalized brand match · 1 Part D row |
20 | suppressed by CMS |
| MDD US Operations, LLC Exact reporting entity; no affiliate inference |
2025 | Xadago open payments reported associated product |
CMS Open Payments — General Payments 139 supporting records · 79 recipient NPIs · example record 1241843808 |
Xadago · 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 |
|---|---|---|---|
| Rytary | Carbidopa/Levodopa | 306 | 34 |
| Neupro | Rotigotine | 87 | 13 |
| Nourianz | Istradefylline | 85 | 12 |
| Ongentys | Opicapone | 70 | suppressed |
| Rasagiline Mesylate | Rasagiline Mesylate | 68 | 16 |
| Droxidopa | Droxidopa | 64 | 11 |
| Gabapentin | Gabapentin | 62 | 17 |
| Clonazepam | Clonazepam | 52 | suppressed |
| Inbrija | Levodopa | 38 | 15 |
| Donepezil Hcl | Donepezil Hcl | 35 | suppressed |
| Amantadine | Amantadine Hcl | 32 | suppressed |
| Escitalopram Oxalate | Escitalopram Oxalate | 28 | suppressed |
| Mirtazapine | Mirtazapine | 28 | suppressed |
| Memantine Hcl | Memantine Hcl | 27 | suppressed |
| Sertraline Hcl | Sertraline Hcl | 27 | suppressed |
| Rivastigmine | Rivastigmine | 26 | suppressed |
| Nuplazid | Pimavanserin Tartrate | 25 | suppressed |
| Rivastigmine | Rivastigmine Tartrate | 25 | suppressed |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 23 | suppressed |
| Gocovri | Amantadine Hcl | 20 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 20 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 20 | suppressed |
| Duloxetine Hcl | Duloxetine Hcl | 18 | suppressed |
| Carbidopa-Levodopa Er | Carbidopa/Levodopa | 16 | suppressed |
| Neurontin | Gabapentin | 14 | suppressed |
| Modafinil | Modafinil | 12 | suppressed |
| Trazodone Hcl | Trazodone Hcl | 12 | suppressed |
| Xadago | Safinamide Mesylate | 12 | 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 | $427.49 · 17 records | MDD US Operations, LLC | RYTARY, VYALEV | 4 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Rytary play in your treatment recommendations for me?
- 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