Howard An, MD
Orthopaedic Surgery of the Spine · Chicago, ILNPI 1255310157
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $51,940 of the $81,521 with a category attached, or 63.7%. Zimmer Biomet accounts for 64.2% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2019 at $35,943 and has fallen 99.9% since, to $39 in 2025.
Across 48 payments — averaging $1698.36 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$52K
- Bioventus LLC$23K
- Medyssey USA, Inc$5K
- Medtronic$318
- Si-bone, Inc.$250
- Globus Medical$190
- plus $428 from 5 others
Across 3 payments — averaging $1218.42 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Bioventus LLC$4K
What the payments were for
- Royalty or licence$51,94064%
- Consulting fees$21,75027%
- Speaking & faculty fees$4,7896%
- Travel & lodging$7861%
- Food & beverage$2,2573%
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 |
|---|---|---|
| Zimmer Biomet | 15 | $52,333 |
| Bioventus LLC | 18 | $23,213 |
| Medyssey USA, Inc | 1 | $4,789 |
| Medtronic(2 entities) | 3 | $318 |
| Si-bone, Inc. | 3 | $250 |
| Globus Medical | 1 | $190 |
| Zimvie Inc. | 1 | $147 |
| Stryker | 2 | $138 |
| Highridge Medical LLC | 1 | $93 |
| Heron Therapeutics, Inc. | 1 | $29 |
| Orthofix Medical, Inc. | 2 | $21 |
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.
- Optio-C$51,940
- OsteoAMP$1,027
- Mobi-C$224
- XLIF$190
- Vital$168
- MAZOR X SYSTEM$156
- C-TEK MAXAN$147
- MazorX - Renaissance$124
How this compares
$81,521 in reported general payments places this provider in the 70th percentile of 64 orthopaedic surgery of the spine providers in Illinois.
See all orthopaedic surgery of the spine providers in Illinois →
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 |
|---|---|---|
| Meloxicam | 57 | $159 |
| Methylprednisolone | 35 | $139 |
| Gabapentin | 22 | $132 |
| Tramadol Hcl | 19 | $53 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery of the spine in Chicago
- Frank PhillipsChicago$3.9M
- Kern SinghChicago$1.3M
- Christopher DewaldChicago$1.2M
- Matthew ColmanChicago$334K
- Arash SayariChicago$174K
- Michael LeeChicago$107K
- Gregory LopezChicago$88K
- Purnendu GuptaChicago$33K
- Karan PatelChicago$13K
- Neil MohileChicago$8K
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.