Stephen Mathai, MD
Pulmonary Disease · Baltimore, MDNPI 1235242314
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $59,753 of the $90,977 with a category attached, or 65.7%. 5 manufacturers reported payments, led by Merck at 58.4% of the total. Reporting peaked in 2024 at $38,189 and has fallen 60.1% since, to $15,250 in 2025. Among pulmonary disease clinicians in MD with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 81 payments — averaging $1123.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$53K
- United Therapeutics Corporation$16K
- Actelion Pharmaceuticals US, Inc.$13K
- Actelion Pharmaceuticals, Ltd$9K
- AstraZeneca$118
What the payments were for
- Consulting fees$59,75366%
- Travel & lodging$29,02932%
- Food & beverage$2,1962%
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 |
|---|---|---|
| Merck | 42 | $53,095 |
| United Therapeutics Corporation | 20 | $15,995 |
| Actelion Pharmaceuticals US, Inc. | 10 | $12,943 |
| Actelion Pharmaceuticals, Ltd | 8 | $8,827 |
| AstraZeneca | 1 | $118 |
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
$90,977 in reported general payments places this provider in the 90th percentile of 297 pulmonary disease providers in Maryland.
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 |
|---|---|---|
| AdempasRiociguat | 60 | $847,110 |
| Ambrisentan | 98 | $701,232 |
| OpsumitMacitentan | 29 | $455,161 |
| UptraviSelexipag | 14 | $208,662 |
| Orenitram ErTreprostinil Diolamine | 16 | $171,313 |
| Tadalafil | 26 | $119,988 |
| Sildenafil Citrate | 40 | $23,673 |
| Bosentan | 12 | $14,934 |
| XareltoRivaroxaban | 22 | $6,416 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 11 | $713 |
| Furosemide | 33 | $343 |
| Spironolactone | 23 | $333 |
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 |
|---|---|---|
| Actelion Pharmaceuticals US, Inc.Opsumit, Uptravi, Bosentan | $12,943 | $678,75755 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 90th percentile of 297 pulmonary disease providers in Maryland.
Other pulmonary disease in Baltimore
- Alan SchwartzBaltimore$1.3M
- Hitesh BatraBaltimore$611K
- Lonny YarmusBaltimore$582K
- Robert WiseBaltimore$389K
- Ko Pen WangBaltimore$280K
- Hans LeeBaltimore$277K
- Angela ArgentoBaltimore$269K
- Michael DrummondBaltimore$263K
- Jason AkulianBaltimore$231K
- Kathryn RobinettBaltimore$160K
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.