Jack Rentz, MD
Pain Medicine · Greenwood Village, CONPI 1033300140
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $221,950 of the $264,031 with a category attached, or 84.1%. Si-bone, Inc. accounts for 98.4% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2019 at $78,421 and has fallen 98.8% since, to $950 in 2025. Among pain medicine clinicians in CO with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 377 payments — averaging $700.35 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Si-bone, Inc.$260K
- Abbott$3K
- Boston Scientific$820
- Nalu Medical, Inc.$110
- Pfizer$105
- SPR Therapeutics, Inc$81
- plus $124 from 5 others
What the payments were for
- Consulting fees$221,95084%
- Travel & lodging$32,27312%
- Food & beverage$9,8084%
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. | 327 | $259,839 |
| Abbott | 22 | $2,951 |
| Boston Scientific | 13 | $820 |
| Nalu Medical, Inc. | 1 | $110 |
| Pfizer | 6 | $105 |
| SPR Therapeutics, Inc | 2 | $81 |
| Alphatec Spine, Inc | 2 | $49 |
| Painteq LLC | 1 | $24 |
| Bioventus LLC | 1 | $20 |
| Spinal Simplicity, LLC | 1 | $16 |
| Johnson & Johnson | 1 | $15 |
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$185,074
- IFUSE IMPLANT SYSTEM$64,153
- PROCLAIM$2,041
- GENERAL PAIN MANAGEMENT$418
- ETERNA$300
- Axium$278
- Nalu Neurostimulation System$110
How this compares
$264,031 in reported general payments places this provider in the 95th percentile of 96 pain medicine 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 |
|---|---|---|
| Gabapentin | 49 | $780 |
| Pregabalin | 17 | $769 |
| Tramadol Hcl | 25 | $265 |
| Cyclobenzaprine Hcl | 28 | $210 |
| Tizanidine Hcl | 15 | $181 |
| Duloxetine Hcl | 11 | $154 |
| Meloxicam | 13 | $54 |
Paid to pharmacies, not to this prescriber.
Other pain medicine in Greenwood Village
- Michael Harlander-LockeGreenwood Village$16K
- Robert MoghimGolden$273K
- Donald BernardiniEnglewood$102K
- Haley BurkeAurora$55K
- Amar PatelThornton$47K
- David ColumbusLoveland$30K
- Matthew PouliotFort Collins$26K
- Justin MerkowEnglewood$24K
- Daniel FeldmanBroomfield$18K
- Steven WrightWheat Ridge$18K
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.