Judy Chang, OD
Optometry · Santa Clara
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
Offices
1 location · Permanente Medical Group Inc · 10,928 clinicians in this group
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 (408) 851-1000 to ask if they take your plan before you enroll.
Medicaid work
$505 in 2024
Medicaid paid $505 for 44 billed services this clinician did in 2024, up to 18 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
| DETERMINATION REFRACTIVE STATE | 31 | $324 |
| Ophthalmological services: medical examination and evaluation, with initiation or continuation of diagnostic and treatment program; intermediate, established patient | 13 | $181 |
| 2024 | 44 | 2 | 18 | $505 |
| 2023 | 42 | 2 | 16 | $0 |
| 2022 | 72 | 2 | 18 | $0 |
| 2021 | 33 | 1 | 17 | $0 |
| 2019 | 27 | 1 | 15 | $7 |
| 2018 | 44 | 3 | 15 | $0 |
See the largest Medicaid services in earlier years
2023
| Ophthalmological services: medical examination and evaluation, with initiation or continuation of diagnostic and treatment program; intermediate, established patient | 12 | $0 |
| DETERMINATION REFRACTIVE STATE | 30 | $0 |
2022
| Ophthalmological services: medical examination and evaluation, with initiation or continuation of diagnostic and treatment program; intermediate, established patient | 14 | $0 |
| DETERMINATION REFRACTIVE STATE | 58 | $0 |
2021
| DETERMINATION REFRACTIVE STATE | 33 | $0 |
2019
| DETERMINATION REFRACTIVE STATE | 27 | $7 |
2018
| Ophthalmological services: medical examination and evaluation, with initiation or continuation of diagnostic and treatment program; intermediate, established patient | 15 | $0 |
| DETERMINATION REFRACTIVE STATE | 15 | $0 |
| FUNDUS PHOTOGRAPHY W/INTERPRETATION & REPORT | 14 | $0 |
Drugs they prescribed that Part D paid
$1,663
Pharmacies billed $1,663 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 40) in 2024. Too few prescriptions to compare fairly with other clinicians.
27 generic and 13 brand-name prescriptions · $1,663 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.
| Cyclosporine | 11 | $1,007 | $92 |
| Latanoprost | 12 | $190 | $16 |
Year by year
| 2024 | 40 | 15 | 0% (0) | 33% | $1,663 |
| 2023 | 25 | 15 | 0% (0) | None | $1,096 |
| 2019 | 12 | None | 0% (0) | None | $869 |
| 2018 | 18 | 12 | 0% (0) | 61% | $1,531 |
| 2016 | 21 | None | 0% (0) | None | $1,245 |
| 2015 | 46 | 16 | 0% (0) | None | $4,452 |
| 2014 | 106 | 37 | 0% (0) | 61% | $12,944 |
| 2013 | 140 | 44 | 0% (0) | 79% | $17,192 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2014: 3 drugs
| Restasis | 15 | $6,125 | $408 |
| Alphagan P | 16 | $1,554 | $97 |
| Timolol Maleate | 11 | $128 | $12 |
2013: 5 drugs
| Restasis | 14 | $4,787 | $342 |
| Lumigan | 24 | $3,966 | $165 |
| Combigan | 12 | $1,326 | $110 |
| Alphagan P | 11 | $1,042 | $95 |
| Prednisolone Acetate | 11 | $245 | $22 |
Money from drug and device companies
$140 in 2025
| 2025 | 1 | 5 | None | $140 |
| 2024 | 3 | 12 | None | $617 |
| 2023 | 1 | 2 | None | $227 |
| 2021 | 1 | 2 | None | $49 |
| 2020 | 1 | 1 | None | $17 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Abbvie | Durysta | $140 | 5 payments
|
See all 5 published payments
| Abbvie | Meals · 2025-10-10 | Durysta | $24 |
| Abbvie | Meals · 2025-07-25 | Durysta | $31 |
| Abbvie | Meals · 2025-07-03 | Durysta | $30 |
| Abbvie | Meals · 2025-05-15 | Durysta | $25 |
| Abbvie | Meals · 2025-03-13 | Durysta | $29 |
See earlier years (2024, 2023, 2021, 2020)
2024: $617
| Abbvie | Durysta | $362 | 10 payments
|
| Alcon Vision | Centurion | $150 | 1 payment
|
| Oyster Point Pharma | Tyrvaya | $105 | 1 payment
|
2023: $227
| AbbVie | Durysta | $227 | 2 payments
|
2021: $49
| MannKind | Afrezza | $49 | 2 payments
|
2020: $17
| Carl Zeiss Meditec | None Specified | $17 | 1 payment
|
Professional record
- NPI
- 1316090384
- Licence
- CA 10299T
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 152W00000X (152W00000X)
- Mailing address
- 320 Lennon Ln, Walnut Creek, CA, 94598
- NPI first listed
- 2007-01-20
- NPI last updated
- 2022-01-03
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.