Mark Chan, MD
Physical Medicine & Rehabilitation · Boulder, CONPI 1255569638
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 32 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 14 manufacturers, the largest accounting for just 18.7% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $283 and has fallen 92.4% since, to $21 in 2025.
Across 32 payments — averaging $20.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Si-bone, Inc.$125
- AbbVie$81
- Scilex Pharmaceuticals Inc.$72
- Biodelivery Sciences International, Inc.$65
- Pfizer$52
- Radius Health, Inc.$46
- plus $226 from 8 others
What the payments were for
- Food & beverage$668100%
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 |
|---|---|---|
| Si-bone, Inc. | 1 | $125 |
| AbbVie(2 entities) | 4 | $81 |
| Scilex Pharmaceuticals Inc. | 5 | $72 |
| Biodelivery Sciences International, Inc. | 5 | $65 |
| Pfizer | 3 | $52 |
| Radius Health, Inc. | 1 | $46 |
| Collegium Pharmaceutical, Inc. | 3 | $42 |
| Redhill Biopharma Inc. | 2 | $39 |
| Bioventus LLC | 2 | $38 |
| Pacira Therapeutics, Inc. | 2 | $33 |
| Arbor Pharmaceuticals, Inc. | 1 | $22 |
| Assertio Therapeutics, Inc. | 1 | $21 |
| Abbott | 1 | $18 |
| Lilly USA, LLC | 1 | $13 |
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.
- iFuse Implant$125
How this compares
$668 in reported general payments places this provider in the 70th percentile of 199 physical medicine & rehabilitation providers in Colorado.
See all physical medicine & rehabilitation providers in Colorado →
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 |
|---|---|---|
| Baclofen | 21 | $1,829 |
| Tizanidine Hcl | 14 | $491 |
| Gabapentin | 11 | $349 |
Paid to pharmacies, not to this prescriber.
Other physical medicine & rehabilitation in Boulder
- Cliff GronsethBoulder$7K
- Justin GreenBoulder$2K
- Bradley GaleBoulder$2K
- Ilya IgolnikovBoulder$2K
- Jennifer TsoiBoulder$1K
- John TobeyBoulder$702
- Drew TrainorGreenwood Village$320K
- William ScelzaEnglewood$16K
- Aakash ThakralGreeley$14K
- Alan WeintraubEnglewood$10K
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.