$5,037 in research paymentsMacular DegenerationRetinal DegenerationAfliberceptHigh-dose aflibercept
Dr. William Lloyd Clark, MD
NPI1528057890PAC ID2668569161
- Medicare services, 2024
- 26,132
- Medicare patients, 2024
- 743
- Part D claims, 2024
- 567
- Clinical trials
- 2
- Hospital affiliations
- 1
- Practice address
- 124 Sunset Ct, West Columbia, SC 29169
- Practice phone
- Call (803) 931-0077
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Palmetto Retina Center
West Columbia, South Carolina
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Dr. William Lloyd Clark is an ophthalmologist in West Columbia, South Carolina
Dr. Clark practices at Palmetto Retina Center in West Columbia, South Carolina.
Dr. Clark's NPI, 1528057890, was assigned on October 19, 2005. Dr. Clark graduated from University of North Carolina at Chapel Hill School of Medicine in 1995. Dr. Clark holds South Carolina license 21749.
NPI and contact details
- NPI
- 1528057890NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668569161
- NPI enumeration date
- October 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (803) 931-0077
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Lloyd Clark practices at Palmetto Retina Center in West Columbia, South Carolina
Dr. Clark's primary practice is Palmetto Retina Center, at 124 Sunset Ct, West Columbia, SC 29169 in Lexington County. The practice phone is (803) 931-0077.
- Palmetto Retina Center124 Sunset Ct, West Columbia, SC 29169 · Lexington CountyPhone(803) 931-0077
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Lloyd Clark is affiliated with 4 sites of care and 2 medical groups
Dr. Clark's primary practice is Palmetto Retina Center in West Columbia, South Carolina. Dr. Clark is also affiliated with CarolinaEast Medical Center. Dmand AI also links Dr. Clark to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Palmetto Retina CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Lloyd Clark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Palmetto Retina Center | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Lloyd Clark is one of 269 ophthalmologists in South Carolina
Ophthalmology is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Clark's licenses on file in 2 states: South Carolina and North Carolina.
Specialties and state licenses
- Ophthalmology, South CarolinaPrimary
- North Carolina license
Ophthalmologists near Dr. Clark
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
269ophthalmologists in South Carolina
9ophthalmologists in West Columbia
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Lloyd Clark billed Medicare for 26,132 services in 2024
CMS data shows 26,132 Medicare services from Dr. Clark across 16 procedure codes in 2024, for 743 Medicare patients. Medicare paid $3,800,727 for them. Every service was in an office.
Medicare services, 202426,132
Medicare patients743
Paid by Medicare$3.8M
Procedure codes16
Dr. Clark's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 9,7282024: 18,88894%
- Tests and treatments
- 2023: 2,8272024: 3,27916%
- Other services
- 2023: 1,7742024: 1,9319%
- Surgery
- 2023: 1,7372024: 1,7032%
- Office and hospital visits
- 2023: 3582024: 3318%
Dr. Clark compared with the South Carolina median for ophthalmologists, 2024
- Dr. Clark
- South Carolina median
- Medicare services
- 26,132vs 2,44610.7 times
- Medicare patients
- 743vs 88116% below
- Part D claims
- 524vs 74830% below
Medians across 277 ophthalmologists in South Carolina with Dmand AI profiles that report each measure.
Dr. Clark's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Clark and other ophthalmologists in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Lloyd Clark treated 743 Medicare patients in 2024, average age 77
CMS counts 743 Medicare patients who saw Dr. Clark in 2024. The largest group is 75 to 84, with 281 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 1.43, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 74, with 61% women.
Medicare patients, 2024743
Average age77
Average risk score1.43
Also on Medicaid5%
Dr. Clark's Medicare patients by age, 2024
Dr. Clark's Medicare patients by sex, 2024
- Women41456%
- Men32944%
Chronic conditions among Dr. Clark's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Diabetes43%
- Ischemic heart disease35%
- Chronic kidney disease33%
- Anxiety23%
- Atrial fibrillation20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Lloyd Clark wrote 567 Medicare Part D claims in 2024
In 2024, Dr. Clark wrote 567 Medicare Part D claims for 140 patients. 55% of them were for generic drugs. CMS names the drug for 524 of them, across 12 drugs with 11 or more claims each, at $31,687 in total drug cost. In 2023, CMS named 406 claims across 11 drugs.
Part D claims, 2024567
Drugs named by CMS12
Total drug cost$31,687
Part D patients140
Dr. Clark's Part D claims by kind of drug, 2024
- Generic312 claims55%
- Brand-name255 claims45%
Dr. Clark's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4062024: 52429%
Drugs named by CMS: 12 in 2024, 11 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. William Lloyd Clark takes part in Medicare
Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Lloyd Clark has worked on 2 clinical trials
Dmand AI links Dr. Clark to 2 clinical trials. Conditions studied include Macular Degeneration and Retinal Degeneration. Regeneron Pharmaceuticals sponsors the most, 2. Open Payments lists research payments to Dr. Clark that name 2 trials.
Conditions in Dr. Clark's trials
- Macular Degeneration
- Retinal Degeneration
Investigators on the most trials with Dr. Clark
- David M. Brown, MD2 shared trials
- Stuart Kevin Burgess, MD2 shared trials
- Nauman Alam Chaudhry, MD2 shared trials
Recent clinical trials with Dr. Clark
$17,004 in research paymentsIntravitreal aflibercept injection [IAI]Sham
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. William Lloyd Clark received $1,167,148 in industry payments from 2016 to 2025
CMS Open Payments shows 990 general payments to Dr. Clark from 26 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 63% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $849,474. It also lists 23 research payments totaling $30,777 from 2017 to 2024, naming 2 clinical trials.
General payments to Dr. Clark by program year, 2016 to 2025
General payments to Dr. Clark by kind, 2016 to 2025
$1.2Min total
- Speaker and faculty fees$732,40063%
- Consulting fees$262,77023%
- Travel and lodging$148,16913%
- Food and beverage$23,7662%
- Education$420%
Companies that paid Dr. Clark the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Lloyd Clark graduated from University of North Carolina at Chapel Hill School of Medicine
Dr. Clark graduated from University of North Carolina at Chapel Hill School of Medicine in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Lloyd Clark'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Dr. William Lloyd Clark
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Lloyd Clark's NPI number?
Dr. William Lloyd Clark's NPI number is 1528057890. It was assigned on October 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William Lloyd Clark?
Dr. William Lloyd Clark is an ophthalmologist in West Columbia, South Carolina. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. William Lloyd Clark practice?
Dr. Clark practices at 124 Sunset Ct, West Columbia, SC 29169. Dr. Clark's primary practice is Palmetto Retina Center in West Columbia, South Carolina. Dmand AI also links Dr. Clark to 2 group practices and clinics and 2 medical groups.
What is Dr. William Lloyd Clark's office phone number?
The practice phone on file for Dr. Clark is (803) 931-0077.
What is Dr. William Lloyd Clark's medical license number?
Dr. Clark holds South Carolina license 21749, one of the licenses on file in 2 states.
Which states has Dr. William Lloyd Clark been licensed in?
Dmand AI has state licenses on file for Dr. Clark in South Carolina and North Carolina.
Which hospitals is Dr. William Lloyd Clark affiliated with?
Dr. Clark is affiliated with CarolinaEast Medical Center.
Does Dr. William Lloyd Clark accept Medicare?
Yes. CMS data shows Dr. Clark billed Medicare for 26,132 services in 2024, and Dr. Clark accepts Medicare assignment.
How many Medicare patients does Dr. William Lloyd Clark see?
CMS counts 743 Medicare patients who saw Dr. Clark in 2024, with an average age of 77.
What services does Dr. William Lloyd Clark bill to Medicare?
In 2024, Dr. Clark's most billed Medicare services were injected or infused drug (J2777), injected or infused drug (J0177) and eye exam or test (92134).
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Where did Dr. William Lloyd Clark go to medical school?
Dr. Clark graduated from University of North Carolina at Chapel Hill School of Medicine in 1995.
What drugs does Dr. William Lloyd Clark prescribe most?
In 2024 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Prednisolone Acetate, Atropine Sulfate and Latanoprost.
Has Dr. William Lloyd Clark received payments from drug or device companies?
CMS Open Payments shows $1,167,148 in general payments to Dr. Clark from 26 companies from 2016 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. William Lloyd Clark been practicing?
Dr. Clark graduated from medical school in 1995, 31 years ago.
Does Dr. William Lloyd Clark do research?
Dr. Clark has worked on 2 clinical trials.
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