Doctor profile · Federal record
Dr. Mark Williams, O.D.
Optometrist (CMS: Optometry) · Redondo Beach, CA
- NPI 1316917842
- Accepts Medicare
- 46 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
239 Avenida del Norte
Redondo Beach, CA 902775702
(310) 540-5545
fax (310) 540-5536
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- February 7, 2013
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 152W00000X — NUCC code
- State license (1)
- California #7603T
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1316917842. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
86
Distinct HCPCS
3
Medicare allowed
$6,979
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 44 | 30 | $74 | |
66984 |
Removal of cataract with insertion of prosthetic lens | 23 | 18 | $117 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 19 | 16 | $54 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 46. This provider delivers 1.9× the peer median.Open Payments
Industry payments received
All-time total
$44
Transactions
3
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Alcon Vision LLC | 3 | $43.80 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
102
Patients
0
Total drug cost
$6,792
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Travoprost | Generic | 41 | 0 | $5,863 |
| Timolol Maleate | Generic | 33 | 0 | $237 |
| Latanoprost | Generic | 17 | 0 | $291 |
| Prednisolone Acetate | Generic | 11 | 0 | $402 |
Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Optometrist in Redondo Beach, CA.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at 239 Avenida del Norte, Redondo Beach, CA 902775702. Office phone: 3105405545.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1316917842, issued by NPPES.
Does Dr. Mark Williams accept Medicare assignment?
Yes. Dr. Mark Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Williams commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Removal of cataract with insertion of prosthetic lens (HCPCS 66984); Established patient office or other outpatient visit (HCPCS 99212). Source: CMS Medicare Physician & Other Practitioners file.