John Williams, MD
Endocrinology, Diabetes & Metabolism · Knoxville, TNNPI 1982605598
Payments from drug & device makers
Across 90 payments — averaging $38.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Tandem Diabetes Care, Inc.$2K
- Dexcom, Inc.$442
- Abbott$438
- Amgen$228
- Novartis$188
- Asensus Surgical, Inc.$160
- plus $428 from 12 others
What the payments were for
- Speaking & faculty fees$1,55045%
- Food & beverage$1,88555%
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 |
|---|---|---|
| Tandem Diabetes Care, Inc. | 5 | $1,550 |
| Dexcom, Inc. | 20 | $442 |
| Abbott | 29 | $438 |
| Amgen(2 entities) | 4 | $228 |
| Novartis | 12 | $188 |
| Asensus Surgical, Inc. | 1 | $160 |
| Esperion Therapeutics, Inc. | 1 | $124 |
| Novo Nordisk | 3 | $50 |
| Nevro Corp. | 3 | $46 |
| AbbVie | 3 | $42 |
| Gilead | 1 | $34 |
| Pfizer | 2 | $29 |
| Cequr Corporation | 1 | $24 |
| Medtronic | 1 | $19 |
| Radius Health, Inc. | 1 | $18 |
| Amneal Pharmaceuticals LLC | 1 | $16 |
| Boehringer Ingelheim | 1 | $14 |
| Sanofi Pasteur 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.
- t:slim X2 insulin pump$1,150
- t-slim insulin pump$400
- Senhance Surgical Robotics System$160
- EVENITY$124
- NEXLIZET$124
- NEXLETOL$124
How this compares
$3,435 in reported general payments places this provider in the 45th percentile of 130 endocrinology, diabetes & metabolism providers in Tennessee.
See all endocrinology, diabetes & metabolism providers in Tennessee →
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 |
|---|---|---|
| OzempicSemaglutide | 76 | $157,996 |
| ForteoTeriparatide | 27 | $115,272 |
| MounjaroTirzepatide | 35 | $54,957 |
| JardianceEmpagliflozin | 32 | $42,470 |
| Tresiba Flextouch U-200Insulin Degludec | 11 | $29,785 |
| Tresiba Flextouch U-100Insulin Degludec | 40 | $25,172 |
| TrulicityDulaglutide | 14 | $22,714 |
| Fiasp FlextouchInsulin Aspart (Niacinamide) | 17 | $17,052 |
| SynthroidLevothyroxine Sodium | 198 | $16,509 |
| FarxigaDapagliflozin Propanediol | 12 | $12,098 |
| NovologInsulin Aspart | 24 | $9,773 |
| Omnipod 5 Dexg7g6 Pods (Gen 5)Insulin Pump Cart,auto,bt,g6/7 | 13 | $8,734 |
| Novolog FlexpenInsulin Aspart | 22 | $8,251 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 40 | $6,523 |
| Testosterone | 38 | $6,099 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Novo NordiskOzempic, Novolog | $50 | $167,769100 claims |
| Boehringer IngelheimJardiance | $14 | $42,47032 claims |
| AbbVieSynthroid, Armour Thyroid | $42 | $19,835232 claims |
| Amneal Pharmaceuticals LLCLevothyroxine Sodium | $16 | $5,148663 claims |
| PfizerLevoxyl | $29 | $2,22444 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 45th percentile of 130 endocrinology, diabetes & metabolism providers in Tennessee.
Other endocrinology, diabetes & metabolism in Knoxville
- Amit VoraKnoxville$579K
- David IrizarryKnoxville$96K
- Casey PageKnoxville$82K
- Mubashir MahmoodKnoxville$26K
- Thomas DotyKnoxville$21K
- Daniel McCammonKnoxville$9K
- Stephen SharpNashville$25.9M
- Lisa UsdanMemphis$14.3M
- Kathryn DahirNashville$11M
- David HuffmanChattanooga$2.4M
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.