Doctor profile · Federal record
Dr. Joseph Chen, M.D.
Ophthalmology Physician (CMS: Ophthalmology) · Ophthalmology Physician · Westlake Village, CA
- NPI 1639496953
- Accepts Medicare
- MIPS 7.9 / 100 · 2023
- 17 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4353 Park Terrace Dr Ste 150
Westlake Village, CA 913614639
(805) 987-5300
Credentials & registration
- NPI registered
- April 2010 — 16 yrs on file
- Profile last updated
- July 10, 2023
- Year of graduation
- 2009 — 17 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State licenses (2)
- California #A131213 · Texas #BP20036802
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639496953. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,209
Distinct HCPCS
10
Medicare allowed
$411,542
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 870 | 432 | $99 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 505 | 378 | $140 | |
92083 |
Exam of visual field with extended testing | 314 | 239 | $58 | |
92133 |
Imaging of optic nerve | 264 | 255 | $41 | |
92134 |
Imaging of retina | 198 | 190 | $43 | |
92136 |
Measurement of corneal curvature and depth of eye | 188 | 112 | $33 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 187 | 187 | $180 | |
66984 |
Removal of cataract with insertion of prosthetic lens | 168 | 106 | $521 | |
92136 |
Measurement of corneal curvature and depth of eye | 160 | 153 | $53 | |
76514 |
Ultrasound scan of cornea to determine thickness | 90 | 90 | $12 |
In context: peer comparison
Among 6 peers in this city , average services per provider: 178. This provider delivers 18× the peer median.Open Payments
Industry payments received
All-time total
$2,471
Transactions
61
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 18 | $436.28 | |
| Alcon Vision LLC | 16 | $394.26 | |
| Bausch & Lomb Americas Inc. | 6 | $378.51 | |
| Sight Sciences, Inc. | 4 | $371.04 | |
| Glaukos Corporation | 2 | $249.57 | |
| Nova Eye, Inc. | 1 | $139.21 | |
| Amgen Inc. | 2 | $130.83 | |
| SUN PHARMACEUTICAL INDUSTRIES INC. | 2 | $63.80 | |
| Rayner Intraocular Lenses Limited | 2 | $58.90 | |
| BIOTISSUE HOLDINGS INC. | 1 | $46.38 | |
| Tarsus Pharmaceuticals, Inc. | 2 | $37.83 | |
| Oyster Point Pharma, Inc. | 2 | $37.69 | |
| Johnson & Johnson Surgical Vision, Inc. | 1 | $36.61 | |
| Mallinckrodt Hospital Products Inc. | 1 | $29.23 | |
| RxSight Inc | 1 | $23.97 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,415
Patients
1,009
Total drug cost
$401,783
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 428 | 154 | $7,789 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 304 | 95 | $7,461 |
| Prednisolone Acetate | Generic | 278 | 158 | $10,247 |
| Timolol Maleate | Generic | 232 | 83 | $6,178 |
| Lumigan (Bimatoprost) | Brand | 205 | 67 | $116,987 |
| Alphagan P (Brimonidine Tartrate) | Brand | 144 | 49 | $67,527 |
| Brimonidine Tartrate | Generic | 142 | 50 | $6,045 |
| Diclofenac Sodium | Generic | 118 | 82 | $1,660 |
| Moxifloxacin (Moxifloxacin Hcl) | Brand | 114 | 72 | $4,339 |
| Ofloxacin | Generic | 106 | 78 | $1,370 |
Hospital affiliations
Frequently asked questions
What is Dr. Joseph Chen's medical specialty?
Dr. Joseph Chen practices Ophthalmology Physician in Westlake Village, CA.
Where does Dr. Joseph Chen practice?
Dr. Joseph Chen practices at 4353 Park Terrace Dr Ste 150, Westlake Village, CA 913614639. Office phone: 8059875300.
What is Dr. Joseph Chen's NPI?
Dr. Joseph Chen's National Provider Identifier (NPI) is 1639496953, issued by NPPES.
Does Dr. Joseph Chen accept Medicare assignment?
Yes. Dr. Joseph Chen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Joseph Chen commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Exam of visual field with extended testing (HCPCS 92083). Source: CMS Medicare Physician & Other Practitioners file.