John Liu, MD
Neurological Surgery · Los Angeles, CANPI 1235161449
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $11,875 of the $14,180 with a category attached, or 83.7%. Novapproach Spine, LLC accounts for 83.7% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2024 at $10,001 and has fallen 62.7% since, to $3,733 in 2025.
Across 31 payments — averaging $457.44 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novapproach Spine, LLC$12K
- GS Solutions, Inc.$1K
- Medtronic$848
- Globus Medical$154
- Viseon, Inc.$132
- Alphatec Spine, Inc$57
- plus $114 from 4 others
Across 4 payments — averaging $1956.96 each. An ownership or investment interest held by the physician or an immediate family member.
- Viseon, Inc.$8K
- Novapproach Spine, LLC$0
What the payments were for
- Consulting fees$11,87584%
- Speaking & faculty fees$1,0007%
- Food & beverage$1,3059%
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 |
|---|---|---|
| Novapproach Spine, LLC | 14 | $11,875 |
| GS Solutions, Inc. | 1 | $1,000 |
| Medtronic | 7 | $848 |
| Globus Medical | 1 | $154 |
| Viseon, Inc. | 1 | $132 |
| Alphatec Spine, Inc | 1 | $57 |
| AbbVie | 2 | $48 |
| AstraZeneca | 2 | $38 |
| Abbott | 1 | $15 |
| Siemens Medical Solutions USA, Inc. | 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.
- OneLIF$11,875
- MAZOR X SYSTEM$559
- UNID_PASS$200
- Excelsius - GPS$154
- MaxView System - Lateral Set$132
How this compares
$14,180 in reported general payments places this provider in the 65th percentile of 773 neurological surgery providers in California.
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.
Other neurological surgery in Los Angeles
- Larry KhooLos Angeles$2.8M
- Aaron Cohen-GadolLos Angeles$1.3M
- Geoffrey ColbyLos Angeles$1.1M
- Langston HollyLos Angeles$846K
- Linda LiauLos Angeles$783K
- Adam MamelakLos Angeles$678K
- Martin PhamLos Angeles$596K
- Carl LauryssenLos Angeles$571K
- Vivek MehtaLos Angeles$442K
- Patrick HsiehLos Angeles$345K
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.