Roger Christopher Chang, MD, PHD
Epilepsy · Palo Alto
- Medicare standing
- 1 flag on the record
- Listed below.
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
On the public record
- Medicare does not list them as allowed to order and refer
Offices
1 location
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Chang’s office at (650) 723-4000 to ask if they take your plan before you enroll.
Original Medicare doctor bills
$2,972
Medicare paid this office $2,972 for 18 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Who their Medicare patients are
18 Original Medicare patients in 2024. Average age 65 · 85 and older 0% · Health risk score 1.69. Above the middle of the specialty; the typical neurology clinician is at 1.61.
Conditions among them: High blood pressure 67%.
The office billed $14,747, Medicare allowed $3,970 and paid $2,972; for 23 services of 7 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Drugs they prescribed that Part D paid
$15,090
Pharmacies billed $15,090 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
29 generic and fewer than 11 brand-name prescriptions · $15,090 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
Year by year
| 2024 | 35 | 13 | None | None | $15,090 |
| 2023 | 28 | None | 0% (0) | None | $5,921 |
| 2022 | 11 | 11 | 0% (0) | None | $801 |
| 2021 | 44 | 13 | 0% (0) | None | $5,388 |
| 2020 | 16 | None | 0% (0) | None | $1,506 |
| 2019 | 20 | 11 | 0% (0) | None | $1,035 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
Money from drug and device companies
$676 in 2025
| 2025 | 4 | 8 | None | $676 |
| 2024 | 1 | 3 | None | $131 |
| 2023 | 1 | 4 | None | $1,049 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Jazz Pharmaceuticals | Epidiolex | $329 | 4 payments
|
| LivaNova USA | Vns Therapy Sentiva Model 1000 Generator | $136 | 1 payment
|
| SK Life Science | None | $109 | 2 payments
|
| Lundbeck | Rexulti | $102 | 1 payment
|
See all 8 published payments
| Lundbeck | Meals · 2025-12-11 | Rexulti | $102 |
| Jazz Pharmaceuticals | Meals · 2025-12-08 | Epidiolex | $77 |
| LivaNova USA | Meals · 2025-04-29 | Vns Therapy Sentiva Model 1000 Generator | $136 |
| Jazz Pharmaceuticals | Meals · 2025-04-09 | Epidiolex | $118 |
| SK Life Science | Meals · 2025-04-09 | None | $39 |
| Jazz Pharmaceuticals | Meals · 2025-04-06 | Epidiolex | $39 |
| SK Life Science | Meals · 2025-04-06 | None | $70 |
| Jazz Pharmaceuticals | Meals · 2025-03-22 | Epidiolex | $95 |
See earlier years (2024, 2023)
2024: $131
| Jazz Pharmaceuticals | Epidiolex | $131 | 3 payments
|
2023: $1,049
| Neuropace | Rns Neurostimulator Kit | $1,049 | 4 payments
|
Professional record
- NPI
- 1679035216
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 2084E0001X (2084E0001X); Neurology (2084N0400X)
- Mailing address
- 300 Pasteur Dr, Palo Alto, CA, 94304
- NPI first listed
- 2019-04-02
- NPI last updated
- 2024-07-04
- NPI record certified
- 2024-07-04
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 1959 Ne Pacific St, Seattle, WA, 98195