Doctor profile · Federal record
Dr. Judy Chang, O.D.
Optometrist (CMS: Optometry) · Walnut Creek, CA
- NPI 1316090384
- Accepts Medicare
- 32 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
320 Lennon Ln
Walnut Creek, CA 945982419
(925) 469-3700
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- January 3, 2022
- Year of graduation
- 1994 — 32 yrs since
- Specialty taxonomy
- 152W00000X — NUCC code
- State license (1)
- California #10299T
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1316090384. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$617
Transactions
12
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 10 | $362.47 | |
| Alcon Vision LLC | 1 | $149.97 | |
| Oyster Point Pharma, Inc. | 1 | $104.57 |
By nature of payment
Frequently asked questions
What is Dr. Judy Chang's medical specialty?
Dr. Judy Chang practices Optometrist in Walnut Creek, CA.
Where does Dr. Judy Chang practice?
Dr. Judy Chang practices at 320 Lennon Ln, Walnut Creek, CA 945982419. Office phone: 9254693700.
What is Dr. Judy Chang's NPI?
Dr. Judy Chang's National Provider Identifier (NPI) is 1316090384, issued by NPPES.
Does Dr. Judy Chang accept Medicare assignment?
Yes. Dr. Judy Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.