Krishnan Warrior, MD
Pulmonary Disease · Chicago, ILNPI 1255712162
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $4,050 of the $6,097 with a category attached, or 66.4%. United Therapeutics Corporation accounts for 89.6% of it on its own, with 11 other manufacturers making up the rest. 2025 is the largest year on record at $5,497, more than ten times the $18 reported in 2019.
Across 39 payments — averaging $156.32 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- United Therapeutics Corporation$5K
- Melinta Therapeutics, LLC$160
- Boehringer Ingelheim$156
- Insmed, Inc.$76
- Regeneron Healthcare Solutions, Inc.$44
- Takeda Pharmaceuticals U.S.A., Inc.$43
- plus $156 from 6 others
Across 6 payments — averaging $12,920 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.
- Boehringer Ingelheim$52K
- United Therapeutics Corporation$25K
What the payments were for
- Consulting fees$4,05066%
- Travel & lodging$71812%
- Food & beverage$1,32822%
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 |
|---|---|---|
| United Therapeutics Corporation | 17 | $5,463 |
| Melinta Therapeutics, LLC | 6 | $160 |
| Boehringer Ingelheim | 2 | $156 |
| Insmed, Inc. | 3 | $76 |
| Regeneron Healthcare Solutions, Inc. | 2 | $44 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $43 |
| GSK | 2 | $34 |
| Astellas Pharma US Inc | 1 | $31 |
| AstraZeneca | 1 | $28 |
| Ipsen Biopharmaceuticals, Inc | 1 | $26 |
| AbbVie | 1 | $18 |
| Philips North America LLC | 1 | $18 |
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.
- TYVASO$4,808
- OFEV$122
- STEEN Solution$114
How this compares
$6,097 in reported general payments places this provider in the 70th percentile of 539 pulmonary disease providers in Illinois.
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 |
|---|---|---|
| Tyvaso DpiTreprostinil | 33 | $801,248 |
| OfevNintedanib Esylate | 61 | $773,907 |
| PrevymisLetermovir | 13 | $99,373 |
| EliquisApixaban | 33 | $23,414 |
| Everolimus | 18 | $17,315 |
| Atovaquone | 25 | $11,885 |
| Valganciclovir Hcl | 26 | $10,240 |
| Breo ElliptaFluticasone/Vilanterol | 19 | $8,222 |
| Mycophenolic AcidMycophenolate Sodium | 13 | $6,616 |
| Mycophenolate Mofetil | 54 | $6,593 |
| Tacrolimus | 52 | $4,253 |
| Cyclosporine ModifiedCyclosporine, Modified | 31 | $3,281 |
| Sildenafil Citrate | 21 | $2,604 |
| Azathioprine | 22 | $2,305 |
| Pantoprazole Sodium | 102 | $2,278 |
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 |
|---|---|---|
| Boehringer IngelheimOfev | $156 | $773,90761 claims |
| GSKBreo Ellipta | $34 | $8,22219 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 70th percentile of 539 pulmonary disease providers in Illinois.
Other pulmonary disease in Chicago
- Douglas HogarthChicago$2.9M
- Steven WhiteChicago$970K
- Momen WahidiChicago$779K
- Septimiu MurguChicago$633K
- Ayodeji AdegunsoyeChicago$561K
- Ravi KalhanChicago$375K
- Brian GaribaldiChicago$356K
- Manu JainChicago$187K
- Richard WunderinkChicago$178K
- Rade TomicChicago$70K
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.