Ram Patak, MD
Nephrology · Northridge, CANPI 1144218488
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.8% of the total across 166 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 27 manufacturers, the largest accounting for just 15.5% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $3,978 and has fallen 99.5% since, to $21 in 2025.
Across 166 payments — averaging $47.90 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$1K
- AstraZeneca$1K
- Otsuka America Pharmaceutical, Inc.$987
- Johnson & Johnson$856
- Amgen$744
- GSK$424
- plus $3K from 21 others
Across 901 payments — averaging $2231.30 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Akebia Therapeutics Inc$574K
- Eli Lilly$533K
- Kowa Research Institute, Inc.$337K
- Novartis$188K
- Esperion Therapeutics, Inc.$152K
- Ardelyx, Inc.$102K
- plus $125K from 3 others
What the payments were for
- Food & beverage$7,85599%
- Education$961%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AbbVie(2 entities) | 10 | $1,234 |
| AstraZeneca | 29 | $1,033 |
| Otsuka America Pharmaceutical, Inc. | 33 | $987 |
| Johnson & Johnson | 7 | $856 |
| Amgen(2 entities) | 24 | $744 |
| GSK | 10 | $424 |
| Boehringer Ingelheim | 3 | $359 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 3 | $325 |
| Amarin Pharma, Inc. | 2 | $249 |
| Lilly USA, LLC | 7 | $201 |
| Bayer | 4 | $188 |
| Vifor Pharma, Inc. | 8 | $179 |
| Aurinia Pharma U.S., Inc. | 3 | $177 |
| E.r. Squibb & Sons, L.L.C. | 1 | $125 |
| Pfizer | 1 | $125 |
| Sanofi-aventis U.S. LLC | 1 | $125 |
| Mallinckrodt Enterprises LLC | 1 | $124 |
| Merck | 1 | $118 |
| Akebia Therapeutics Inc | 4 | $71 |
| Fresenius USA Marketing, Inc. | 4 | $70 |
| Novartis | 2 | $52 |
| Calliditas Therapeutics US Inc. | 2 | $45 |
| Sanofi | 2 | $34 |
| Travere Therapeutics, Inc. | 1 | $30 |
| Mallinckrodt Hospital Products Inc. | 1 | $28 |
| Ultragenyx Pharmaceutical Inc. | 1 | $25 |
| Ardelyx, Inc. | 1 | $23 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$7,951 in reported general payments places this provider in the 85th percentile of 1,341 nephrology providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| ProcritEpoetin Alfa | 30 | $37,620 |
| LokelmaSodium Zirconium Cyclosilicate | 27 | $22,797 |
| RetacritEpoetin Alfa-Epbx | 12 | $12,878 |
| FarxigaDapagliflozin Propanediol | 14 | $7,117 |
| Furosemide | 64 | $301 |
| Chlorthalidone | 21 | $276 |
| Allopurinol | 26 | $210 |
| Amlodipine Besylate | 17 | $177 |
| Atorvastatin Calcium | 11 | $91 |
| Losartan Potassium | 21 | $72 |
| Hydrochlorothiazide | 14 | $19 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Johnson & JohnsonProcrit | $856 | $37,62030 claims |
| AstraZenecaLokelma, Farxiga | $1,033 | $29,91441 claims |
| PfizerRetacrit | $125 | $12,87812 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 85th percentile of 1,341 nephrology providers in California.
Other nephrology in Northridge
- Ramanath DukkipatiNorthridge$70K
- William YangNorthridge$66K
- Anjay RastogiLos Angeles$2.2M
- Glenn ChertowStanford$2M
- Luis AlvarezPalo Alto$1.8M
- Jose MorfinSacramento$1M
- Rodolfo BatarseRancho Mirage$910K
- Vandana MathurWoodside$769K
- Yasir QaziOrange$618K
- Rafael VillicanaLoma Linda$610K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.