James Singleton, MD
Rheumatology · Highlands Ranch, CONPI 1104881226
Payments from drug & device makers
Across 20 payments — averaging $26.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$217
- Mckesson Specialty Care Distribution, LLC$149
- Johnson & Johnson$56
- Genentech USA, Inc.$39
- ANI Pharmaceuticals, Inc.$20
- Sanofi$18
- plus $25 from 2 others
What the payments were for
- Food & beverage$36069%
- Education$143%
- Gifts$14928%
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 | 10 | $217 |
| Mckesson Specialty Care Distribution, LLC | 1 | $149 |
| Johnson & Johnson | 3 | $56 |
| Genentech USA, Inc. | 2 | $39 |
| ANI Pharmaceuticals, Inc. | 1 | $20 |
| Sanofi | 1 | $18 |
| Pfizer | 1 | $14 |
| Avion Pharmaceuticals | 1 | $11 |
How this compares
$523 in reported general payments places this provider in the 35th percentile of 108 rheumatology 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 |
|---|---|---|
| MethotrexateMethotrexate Sodium | 325 | $7,595 |
| Celecoxib | 31 | $5,709 |
| Hydroxychloroquine Sulfate | 55 | $2,177 |
| Leucovorin Calcium | 36 | $1,803 |
| Leflunomide | 35 | $1,255 |
| Allopurinol | 87 | $870 |
| Prednisone | 106 | $809 |
| Sulfasalazine | 35 | $735 |
| Diclofenac Sodium | 30 | $635 |
| Colchicine | 11 | $617 |
| Methotrexate SodiumMethotrexate Sodium/Pf | 12 | $344 |
| Folic Acid | 40 | $329 |
| Alendronate Sodium | 34 | $246 |
| Ibuprofen | 12 | $221 |
| Methylprednisolone | 22 | $135 |
Paid to pharmacies, not to this prescriber.
Other rheumatology in Highlands Ranch
- Michael ThakorFort Collins$7.3M
- Christopher AntoliniDenver$6.9M
- Christopher StriebichAurora$2M
- Larry MorelandAurora$1.8M
- Kevin DeaneAurora$1.4M
- Mary DemoruelleDenver$1.2M
- Melissa GriffithAurora$667K
- Susan ChildressEnglewood$354K
- Vernon HolersAurora$315K
- Elena WeinsteinAurora$291K
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.