Mark H. Williams, OD
- Medicare patients, 2024
- 59
- Part D claims, 2024
- 138
- Industry payments
- $41
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 239 Avenida Del Norte, Redondo Beach, CA 90277-5799
- Practice phone
- Call (310) 540-5545
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mark Hilker Williams
Eye care practice · Redondo Beach, California
Find Mark Williams' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mark H. Williams is an optometrist in Redondo Beach, California
Mark Williams practices at Mark Hilker Williams in Redondo Beach, California.
Mark Williams' NPI, 1316917842, was assigned on January 26, 2006. Mark Williams graduated from Southern California College of Optometry in 1980. Mark Williams holds California license 7603T.
- NPI
- 1316917842NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103936182
- NPI enumeration date
- January 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 540-5545
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark H. Williams practices at Mark Hilker Williams in Redondo Beach, California
Mark Williams' primary practice is Mark Hilker Williams, at 239 Avenida Del Norte, Redondo Beach, CA 90277-5799. The practice phone is (310) 540-5545.
- Mark Hilker Williams239 Avenida Del Norte, Redondo Beach, CA 90277-5799Phone(310) 540-5545
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark H. Williams is affiliated with 1 site of care and 1 medical group
Mark Williams' primary practice is Mark Hilker Williams in Redondo Beach, California. Dmand AI also links Mark Williams to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Mark H. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mark Hilker Williams | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark H. Williams is one of 7,206 optometrists in California
Optometrist is Mark Williams' primary specialty in the NPI Registry, under taxonomy code 152W00000X. Mark Williams is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Mark Williams
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mark H. Williams treated 59 Medicare patients in 2024, average age 77
CMS counts 59 Medicare patients who saw Mark Williams in 2024. The largest group is 75 to 84, with 33 patients. 75% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Williams' median patient age at 71, with 100% women.
Mark Williams' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mark Williams' Medicare patients by sex, 2024
- Women3356%
- Men2644%
Chronic conditions among Mark Williams' Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis56%
- Chronic kidney disease29%
- Atrial fibrillation20%
- Diabetes19%
Share of Medicare patients with each condition. A patient can have several.
Mark Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark H. Williams wrote 138 Medicare Part D claims in 2024
In 2024, Mark Williams wrote 138 Medicare Part D claims for 39 patients. 65% of them were for generic drugs.
Mark Williams' Part D claims by kind of drug, 2024
- Generic90 claims65%
- Brand-name48 claims35%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Mark H. Williams takes part in Medicare
Mark Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Mark H. Williams received $41 in industry payments in 2025
CMS Open Payments shows 2 general payments to Mark Williams from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. CooperVision Inc. paid the most, $22.
Companies that paid Mark Williams the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Mark H. Williams graduated from Southern California College of Optometry
Mark Williams graduated from Southern California College of Optometry in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mark H. Williams's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mark H. Williams
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark H. Williams' NPI number?
Mark H. Williams' NPI number is 1316917842. It was assigned on January 26, 2006, and it is active in the NPI Registry.
What does Mark H. Williams specialize in?
Mark H. Williams is an optometrist in Redondo Beach, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mark H. Williams practice?
Mark Williams practices at 239 Avenida Del Norte, Redondo Beach, CA 90277-5799. Mark Williams' primary practice is Mark Hilker Williams in Redondo Beach, California. Dmand AI also links Mark Williams to 1 medical group.
What is Mark H. Williams' office phone number?
The practice phone on file for Mark Williams is (310) 540-5545.
What is Mark H. Williams' medical license number?
Mark Williams holds California license 7603T.
Does Mark H. Williams accept Medicare?
Yes. CMS lists Mark Williams as accepting Medicare assignment.
How many Medicare patients does Mark H. Williams see?
CMS counts 59 Medicare patients who saw Mark Williams in 2024, with an average age of 77.
Where did Mark H. Williams go to medical school?
Mark Williams graduated from Southern California College of Optometry in 1980.
Has Mark H. Williams received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Mark Williams from 2 companies from 2025 to 2025. The largest total came from CooperVision Inc.
How long has Mark H. Williams been practicing?
Mark Williams graduated from medical school in 1980, 46 years ago.
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