Doctor profile · Federal record
Dr. David Chang, M.D.
Ophthalmology Physician (CMS: Ophthalmology) · Los Altos, CA
- NPI 1316966138
- MIPS 75.0 / 100 · 2023
- 46 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
762 Altos Oaks Dr
Los Altos, CA 940245434
(650) 948-9123
fax (650) 948-0563
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- May 5, 2015
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State license (1)
- California #G045581
- Medicaid
- CA #00G455810
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1316966138. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,329
Distinct HCPCS
8
Medicare allowed
$972,699
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
92136 |
Measurement of corneal curvature and depth of eye | 1,207 | 821 | $48 | |
66984 |
Removal of cataract with insertion of prosthetic lens | 965 | 614 | $635 | |
92004 |
New patient complete exam of visual system | 700 | 700 | $179 | |
92014 |
Established patient complete exam of visual system | 155 | 155 | $152 | |
66982 |
Complex removal of cataract with insertion of prosthetic lens | 112 | 87 | $852 | |
66821 |
Removal of recurring cataract in lens capsule using a laser | 108 | 100 | $382 | |
92134 |
Imaging of retina | 65 | 65 | $45 | |
66991 |
Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye | 17 | 12 | $783 |
In context: peer comparison
Among 4 peers in Los Altos Ophthalmology Physician, average services per provider: 309. This provider delivers 11× the peer median.Open Payments
Industry payments received
All-time total
$11,617
Transactions
19
Manufacturers
7
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Alcon Research LLC | 2 | $7,600.00 | |
| Alcon Vision LLC | 6 | $2,304.86 | |
| RxSight INC | 1 | $1,250.00 | |
| Johnson & Johnson Surgical Vision, INC. | 6 | $217.77 | |
| Carl Zeiss Meditec USA, INC. | 2 | $167.73 | |
| Johnson & Johnson Vision Care, INC. | 1 | $46.89 | |
| Oyster Point Pharma, INC. | 1 | $29.63 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
390
Patients
263
Total drug cost
$16,538
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ketorolac Tromethamine | Generic | 194 | 123 | $3,969 |
| Prednisolone Acetate | Generic | 123 | 83 | $4,016 |
| Diclofenac Sodium | Generic | 33 | 29 | $394 |
| Lotemax Sm (Loteprednol Etabonate) | Brand | 20 | 14 | $5,343 |
| Loteprednol Etabonate | Generic | 20 | 14 | $2,816 |
Frequently asked questions
What is Dr. David Chang's medical specialty?
Dr. David Chang practices Ophthalmology Physician in Los Altos, CA.
Where does Dr. David Chang practice?
Dr. David Chang practices at 762 Altos Oaks Dr, Los Altos, CA 940245434. Office phone: 6509489123.
What is Dr. David Chang's NPI?
Dr. David Chang's National Provider Identifier (NPI) is 1316966138, issued by NPPES.
Does Dr. David Chang accept Medicare assignment?
Dr. David Chang does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. David Chang commonly perform?
Top Medicare-reported procedures in 2023: Measurement of corneal curvature and depth of eye (HCPCS 92136); Removal of cataract with insertion of prosthetic lens (HCPCS 66984); New patient complete exam of visual system (HCPCS 92004). Source: CMS Medicare Physician & Other Practitioners file.