William Herzog, MD
Interventional Cardiology · Columbia, MDNPI 1902873979
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,656 of the $2,228 with a category attached, or 74.3%. 22 manufacturers reported payments, led by Terumo Medical Corporation at 26.9% of the total. Reporting peaked in 2019 at $1,026 and has fallen 93.2% since, to $69 in 2023. That places this record below the midpoint for interventional cardiology clinicians in MD, where the typical reported total is $7,370.
Across 99 payments — averaging $22.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Terumo Medical Corporation$599
- Boehringer Ingelheim$282
- Novartis$228
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$204
- AstraZeneca$197
- Merck$111
- plus $607 from 16 others
Across 668 payments — averaging $1425.27 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.
- CSL Behring$336K
- Novo Nordisk AS$332K
- Amgen$166K
- Novartis$31K
- Vifor (international) Ltd.$27K
- Boehringer Ingelheim$23K
- plus $36K from 2 others
What the payments were for
- Travel & lodging$48222%
- Food & beverage$1,65674%
- Education$904%
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 |
|---|---|---|
| Terumo Medical Corporation | 6 | $599 |
| Boehringer Ingelheim | 14 | $282 |
| Novartis | 15 | $228 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 11 | $204 |
| AstraZeneca | 12 | $197 |
| Merck | 7 | $111 |
| Medtronic(2 entities) | 5 | $91 |
| Amgen | 5 | $83 |
| Chiesi USA, Inc. | 3 | $71 |
| Johnson & Johnson | 3 | $40 |
| Shockwave Medical, Inc | 2 | $40 |
| Boston Scientific | 1 | $39 |
| E.r. Squibb & Sons, L.L.C. | 3 | $37 |
| Pfizer | 2 | $33 |
| Novo Nordisk | 2 | $31 |
| Bayer | 2 | $31 |
| Abbott | 1 | $29 |
| Cardiovascular Systems Inc. | 1 | $20 |
| Edwards Lifesciences | 1 | $18 |
| Cardinal Health 200 LLC | 1 | $17 |
| Elutia, Inc. | 1 | $15 |
| Irhythm Technologies, Inc. | 1 | $12 |
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.
- Optitorque$412
- Heartrail$412
- TR Band$412
- Glidesheath$412
How this compares
$2,228 in reported general payments places this provider in the 15th percentile of 71 interventional cardiology providers in Maryland.
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 |
|---|---|---|
| Metoprolol Succinate | 20 | $202 |
| Atorvastatin Calcium | 12 | $73 |
Paid to pharmacies, not to this prescriber.
Other interventional cardiology in Columbia
- Vinay SatwahGreenbelt$679K
- Aloke FinnBaltimore$575K
- Michael ChenRockville$241K
- John WangBaltimore$138K
- Steven HearneSalisbury$100K
- Amir NajafiBel Air$82K
- Diljon ChahalBaltimore$78K
- Joseph CinderellaSalisbury$72K
- Ali TabrizchiBel Air$66K
- Homam IbrahimSilver Spring$49K
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.