Patric Liang, MD
Vascular Surgery · Boston, MANPI 1578973293
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $1,400 of the $2,297 with a category attached, or 60.9%. Silk Road Medical, Inc. accounts for 66.6% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2024 at $1,498 and has fallen 65.5% since, to $517 in 2025. That places this record below the midpoint for vascular surgery clinicians in MA, where the typical reported total is $4,155.
Across 11 payments — averaging $208.83 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Silk Road Medical, Inc.$2K
- Cook Medical LLC$171
- W. L. Gore & Associates, Inc.$168
- Lifenet Health$153
- Medtronic$124
- Smith+Nephew$74
- plus $77 from 2 others
What the payments were for
- Speaking & faculty fees$1,40061%
- Food & beverage$77334%
- Education$1245%
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 |
|---|---|---|
| Silk Road Medical, Inc. | 2 | $1,530 |
| Cook Medical LLC | 1 | $171 |
| W. L. Gore & Associates, Inc. | 1 | $168 |
| Lifenet Health | 2 | $153 |
| Medtronic | 1 | $124 |
| Smith+Nephew | 2 | $74 |
| Averitas Pharma Inc. | 1 | $53 |
| Tactile Systems Technology Inc | 1 | $24 |
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.
- ENROUTE Transcarotid Neuroprotection System$2,930
- ENROUTE Enflate Transcarotid RX Balloon Dilatation Catheter$1,400
- ENROUTE Transcarotid Stent$1,400
- ICAST COVERED STENT SYSTEM, 6MMX22MMX120CM$171
- EXCLUDER Conformable AAA Endoprosthesis with Active Control$168
- ENROUTE Transcarotid Stent System$130
- ENHANCE Transcarotid Peripheral Access Kit$130
- ENROUTE 0.014 Guidewire$130
- TheraGenesis Wound Matrix$124
How this compares
$2,297 in reported general payments places this provider in the 40th percentile of 142 vascular surgery providers in Massachusetts.
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 |
|---|---|---|
| Atorvastatin Calcium | 26 | $324 |
Paid to pharmacies, not to this prescriber.
Other vascular surgery in Boston
- Thomas OdonnellBoston$845K
- Anahita DuaBoston$186K
- Marc SchermerhornBoston$71K
- Edwin GravereauxBoston$61K
- Christopher KwolekBoston$55K
- Shivani KumarBoston$45K
- Richard CambriaBoston$43K
- Payam SalehiBoston$40K
- Nicholas SwerdlowBoston$33K
- Mohamad HussainBoston$24K
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.