Diana Chang
Endocrinology, Diabetes & Metabolism · Ventura, CANPI 1396142386
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,407 of the $1,616 with a category attached, or 87.1%. Stryker accounts for 94.3% of it on its own, with 3 other manufacturers making up the rest. 2025 is the largest year on record at $1,426, 10.0 times the $143 reported in 2023.
Across 10 payments — averaging $161.58 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$2K
- Medtronic$61
- Boehringer Ingelheim$19
- Pfizer$13
What the payments were for
- Travel & lodging$1,40787%
- Food & beverage$19012%
- Education$191%
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 |
|---|---|---|
| Stryker | 6 | $1,523 |
| Medtronic | 2 | $61 |
| Boehringer Ingelheim | 1 | $19 |
| Pfizer | 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.
- SCOPIS ENT$1,305
How this compares
$1,616 in reported general payments places this provider in the 55th percentile of 952 endocrinology, diabetes & metabolism providers in California.
See all endocrinology, diabetes & metabolism 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| MounjaroTirzepatide | 211 | $266,433 |
| OzempicSemaglutide | 146 | $201,294 |
| JardianceEmpagliflozin | 159 | $197,961 |
| TrulicityDulaglutide | 83 | $137,805 |
| JanuviaSitagliptin Phosphate | 57 | $53,704 |
| RybelsusSemaglutide | 35 | $52,315 |
| FarxigaDapagliflozin Propanediol | 38 | $33,563 |
| ProliaDenosumab | 16 | $27,635 |
| Evenity (2 Syringes)Romosozumab-Aqqg | 11 | $26,502 |
| Tresiba Flextouch U-100Insulin Degludec | 50 | $24,024 |
| Synjardy XrEmpagliflozin/Metformin Hcl | 14 | $21,875 |
| TradjentaLinagliptin | 16 | $21,249 |
| Janumet XrSitagliptin Phos/Metformin Hcl | 13 | $20,780 |
| Omnipod 5 Dexg7g6 Pods (Gen 5)Insulin Pump Cart,auto,bt,g6/7 | 23 | $17,042 |
| Humalog Kwikpen U-100Insulin Lispro | 51 | $14,816 |
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 |
|---|---|---|
| Boehringer IngelheimJardiance, Synjardy Xr, Tradjenta | $19 | $241,085189 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 55th percentile of 952 endocrinology, diabetes & metabolism providers in California.
Other endocrinology, diabetes & metabolism in Ventura
- Juan FriasSan Diego$1.4M
- Joselito CabaccanSan Jose$1.4M
- Daniel NadeauNewport Beach$1.2M
- Yehuda HandelsmanTarzana$1M
- Helen BaronRancho Mirage$958K
- Ken FujiokaSan Diego$747K
- Minou TranPico Rivera$663K
- James ChuMonterey$639K
- Anthony HeaneyLos Angeles$588K
- Daniel Einhornla Jolla$578K
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.