Joshua Ammerman, MD
Neurological Surgery · Washington, DCNPI 1043361124
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $83,388 of the $103,537 with a category attached, or 80.5%. 23 manufacturers reported payments, led by Medtronic at 26.1% of the total. Reporting peaked in 2019 at $38,084 and has fallen 90.1% since, to $3,781 in 2025. Among neurological surgery clinicians in DC 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 135 payments — averaging $766.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$27K
- Centinel Spine, LLC$23K
- Globus Medical$19K
- Icotec Medical Inc.$11K
- The Institute Of Musculoskeletal Science And Education$10K
- Integrity Implants Inc.$7K
- plus $6K from 17 others
What the payments were for
- Royalty or licence$5,5565%
- Consulting fees$83,38881%
- Speaking & faculty fees$5,8756%
- Travel & lodging$6,5896%
- Food & beverage$1,5542%
- Gifts$5751%
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 |
|---|---|---|
| Medtronic(2 entities) | 18 | $27,017 |
| Centinel Spine, LLC | 10 | $23,355 |
| Globus Medical(2 entities) | 29 | $19,472 |
| Icotec Medical Inc. | 2 | $10,500 |
| The Institute Of Musculoskeletal Science And Education | 19 | $9,986 |
| Integrity Implants Inc. | 18 | $7,012 |
| Camber Spine Technologies LLC | 10 | $2,533 |
| Locate Bio Inc | 1 | $1,125 |
| Intrinsic Therapeutics | 1 | $500 |
| Kuros Biosciences USA, Inc | 3 | $492 |
| Depuy Synthes Products, Inc. | 5 | $440 |
| Axis Spine Technologies Inc. | 1 | $375 |
| Medical Device Business Services, Inc. | 2 | $126 |
| Benvenue Medical Inc | 1 | $119 |
| Choice Spine, LLC | 1 | $116 |
| Zimmer Biomet | 1 | $111 |
| Orthofix Medical, Inc. | 6 | $49 |
| Ossdsign USA Incorporated | 1 | $45 |
| Johnson & Johnson | 2 | $40 |
| Ecential Robotics | 1 | $40 |
| Spinal Elements, Inc. | 1 | $33 |
| 4web, Inc. | 1 | $29 |
| Cerapedics Inc. | 1 | $22 |
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.
- PRODISC C SK$20,315
- Precision TLIF$15,660
- CD HORIZON$11,525
- Vader one Pedicle System MIS$10,500
- CAPSTONE$6,815
- LineSider$3,776
- Spira$3,130
- FlareHawk$3,000
- PRODISC L$3,000
- Simplify Cervical Artificial Disc$2,375
- MAST QUADRANT$2,030
- Fortico$1,934
- MAST QUADRANT RETRACTOR SYSTEM$1,160
- LDGraft$1,125
- Clavical Fixation (16-186)$643
- BARRICAID ACD (ANNULAR CLOSURE DEVICE)$500
- CALIBER$452
- Enza 2.0$400
- Spira-A$400
- AXIS-ALIF$375
How this compares
$103,537 in reported general payments places this provider in the 95th percentile of 31 neurological surgery providers in District of Columbia.
See all neurological surgery providers in District of Columbia →
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 |
|---|---|---|
| Pentazocine-Naloxone HclPentazocine Hcl/Naloxone Hcl | 12 | $2,518 |
| Gabapentin | 80 | $945 |
| Methylprednisolone | 28 | $278 |
| Pregabalin | 11 | $154 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 23 | $143 |
| Diclofenac Sodium | 13 | $97 |
| Methocarbamol | 19 | $72 |
| Meloxicam | 15 | $20 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Washington
- Matthew AmmermanWashington$99K
- Joshua WindWashington$74K
- John RichertWashington$20K
- Abdullah FerozeWashington$15K
- Rocco ArmondaWashington$14K
- Mani NairWashington$13K
- Vinay DeshmukhWashington$12K
- Anna TerryWashington$10K
- Ehsan DowlatiWashington$5K
- Dimitrios SigounasWashington$3K
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.