Dr. Stephen Paul Cassis, MD
- Medicare services, 2024
- 2,234
- Medicare patients, 2024
- 886
- Part D claims, 2024
- 5,808
- MIPS score, 2024
- 61
- Hospital affiliations
- 5
- Practice address
- 4605 Maccorkle Avenue SW, South Charleston, WV 25309
- Practice phone
- Call (304) 766-3600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Cassis' 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.
Dr. Stephen Paul Cassis is an ophthalmologist in South Charleston, West Virginia
Dr. Cassis practices at Thomas Memorial Hospital in South Charleston, West Virginia, part of West Virginia University Health System.
Dr. Cassis' NPI, 1093709289, was assigned on September 2, 2005. Dr. Cassis graduated from West Virginia University School Of Medicine in 1978. Dr. Cassis holds West Virginia license 12950.
- NPI
- 1093709289NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597653683
- NPI enumeration date
- September 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (304) 766-3600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Paul Cassis practices at Thomas Memorial Hospital in South Charleston, West Virginia
Dr. Cassis' primary practice is Thomas Memorial Hospital, at 4605 Maccorkle Avenue SW, South Charleston, WV 25309 in Kanawha County. The practice phone is (304) 766-3600.
- Thomas Memorial Hospital4605 Maccorkle Avenue SW, South Charleston, WV 25309 · Kanawha CountyPhone(304) 766-3600
Source: Dmand AI Affiliation Data
Dr. Stephen Paul Cassis is affiliated with 5 sites of care and 1 medical group
Dr. Cassis' primary practice is Thomas Memorial Hospital in South Charleston, West Virginia, part of West Virginia University Health System. Dr. Cassis is also affiliated with Charleston Area Medical Center General Hospital. The medical group on file is Charleston Surgical Hospital. Dmand AI also links Dr. Cassis to 3 more hospitals, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen Paul Cassis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cassis practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thomas Memorial Hospital | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across West Virginia University Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Stephen Paul Cassis is one of 94 ophthalmologists in West Virginia
Ophthalmology is Dr. Cassis' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Cassis is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Cassis' licenses on file in 2 states: West Virginia and Ohio.
Specialties and state licenses
- Ophthalmology, West VirginiaPrimary
- Ohio license
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, cold sores or genital herpes, conjunctivitis, dry eye, eye infection or inflammation and eyelid inflammation among the conditions Dr. Cassis treats.
Ophthalmologists near Dr. Cassis
Counts of ophthalmologists 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
Dr. Stephen Paul Cassis billed Medicare for 2,234 services in 2024
CMS data shows 2,234 Medicare services from Dr. Cassis across 16 procedure codes in 2024, for 886 Medicare patients. Medicare paid $250,622 for them.
Dr. Cassis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,3062024: 1,01822%
- Office and hospital visits
- 2023: 8472024: 69418%
- Surgery
- 2023: 6782024: 52223%
- Imaging
- 2023: 132024: 0100%
Where Dr. Cassis' Medicare services took place, 2024
- In an office1,85083%
- In a facility38417%
Dr. Cassis compared with the West Virginia median for ophthalmologists, 2024
- Dr. Cassis
- West Virginia median
- Medicare services
- 2,234vs 1,41258% above
- Medicare patients
- 886vs 45794% above
- Part D claims
- 5,642vs 7747.3 times
Medians across 94 ophthalmologists in West Virginia with Dmand AI profiles that report each measure.
Dr. Cassis' 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.
Need commercial claims for Dr. Cassis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Cassis and other ophthalmologists in West Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Paul Cassis treated 886 Medicare patients in 2024, average age 76
CMS counts 886 Medicare patients who saw Dr. Cassis in 2024. The largest group is 65 to 74, with 370 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Cassis' median patient age at 75, with 59% women.
Dr. Cassis' Medicare patients by age, 2024
Dr. Cassis' Medicare patients by sex, 2024
- Women52359%
- Men36341%
Chronic conditions among Dr. Cassis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Diabetes36%
- Ischemic heart disease35%
- Chronic kidney disease29%
- Anxiety27%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cassis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Paul Cassis wrote 5,808 Medicare Part D claims in 2024
In 2024, Dr. Cassis wrote 5,808 Medicare Part D claims for 1,332 patients. 69% of them were for generic drugs. CMS names the drug for 5,642 of them, across 30 drugs with 11 or more claims each, at $373,624 in total drug cost. In 2023, CMS named 5,949 claims across 37 drugs.
Dr. Cassis' Part D claims by kind of drug, 2024
- Generic3,983 claims69%
- Brand-name1,825 claims31%
Dr. Cassis' 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.
Drug classes CMS tracks in Dr. Cassis' Part D claims, 2024
- Antibiotics2%137 of 5,808 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,9492024: 5,6425%
Drugs named by CMS: 30 in 2024, 37 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
Dr. Stephen Paul Cassis scored 61 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 61 out of 100 for Dr. Cassis for performance year 2024, reported individually. Dr. Cassis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 1,451 procedures of cataract surgery by Dr. Cassis, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Cassis' MIPS scores, performance year 2024
- 61of 100Final score
- 20of 100Quality
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Cassis ranks in Medicare procedure volume
- Cataract surgery
- 99th percentile1,451 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen Paul Cassis received $9,130 in industry payments from 2016 to 2025
CMS Open Payments shows 68 general payments to Dr. Cassis from 20 drug and device companies from 2016 to 2025. Debt forgiveness make up the largest share, 59% of the total. Alcon Laboratories Inc paid the most, $6,702.
General payments to Dr. Cassis by program year, 2016 to 2025
General payments to Dr. Cassis by kind, 2016 to 2025
- Debt forgiveness$5,37859%
- Food and beverage$3,75241%
Companies that paid Dr. Cassis 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. Stephen Paul Cassis has 1 award and honors on record
Dmand AI lists 1 award for Dr. Cassis.
Awards and honors for Dr. Cassis
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Stephen Paul Cassis graduated from West Virginia University School Of Medicine
Dr. Cassis graduated from West Virginia University School Of Medicine in 1978. Dr. Cassis is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Stephen Paul Cassis accepts plans from 14 insurance carriers
Dr. Cassis is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Highmark
- +6 more carriersWith a free account
Plan types Dr. Cassis accepts, by number of carriers
- PPO10
- Medicare8
- HMO5
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen Paul Cassis'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Clinician Public Reporting: Overall MIPS Performance (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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Stephen Paul Cassis
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. Stephen Paul Cassis' NPI number?
Dr. Stephen Paul Cassis' NPI number is 1093709289. It was assigned on September 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Paul Cassis?
Dr. Stephen Paul Cassis is an ophthalmologist in South Charleston, West Virginia. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Stephen Paul Cassis practice?
Dr. Cassis practices at 4605 Maccorkle Avenue SW, South Charleston, WV 25309. Dr. Cassis' primary practice is Thomas Memorial Hospital in South Charleston, West Virginia, part of West Virginia University Health System. Dmand AI also links Dr. Cassis to 3 hospitals.
What is Dr. Stephen Paul Cassis' office phone number?
The practice phone on file for Dr. Cassis is (304) 766-3600.
What is Dr. Stephen Paul Cassis' medical license number?
Dr. Cassis holds West Virginia license 12950, one of the licenses on file in 2 states.
Which states has Dr. Stephen Paul Cassis been licensed in?
Dmand AI has state licenses on file for Dr. Cassis in West Virginia (1982 to 2026) and Ohio (1979 to 1982).
Which hospitals is Dr. Stephen Paul Cassis affiliated with?
Dr. Cassis practices at Thomas Memorial Hospital in South Charleston, West Virginia. Dr. Cassis is also affiliated with Charleston Area Medical Center General Hospital. Dmand AI links Dr. Cassis to 3 more hospitals.
What medical group is Dr. Stephen Paul Cassis part of?
Dr. Cassis is linked to Charleston Surgical Hospital.
Does Dr. Stephen Paul Cassis accept Medicare?
Yes. CMS data shows Dr. Cassis billed Medicare for 2,234 services in 2024, and Dr. Cassis accepts Medicare assignment.
What is Dr. Stephen Paul Cassis' MIPS score?
Dr. Cassis' MIPS final score for performance year 2024 is 61 out of 100, reported individually.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Stephen Paul Cassis see?
CMS counts 886 Medicare patients who saw Dr. Cassis in 2024, with an average age of 76.
Is Dr. Stephen Paul Cassis board certified?
Yes. Dr. Cassis is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Stephen Paul Cassis bill to Medicare?
In 2024, Dr. Cassis' most billed Medicare services were office visit, established patient (99213), eye exam or test (92136) and surgery: eye (66984).
Where did Dr. Stephen Paul Cassis go to medical school?
Dr. Cassis graduated from West Virginia University School Of Medicine in 1978.
What drugs does Dr. Stephen Paul Cassis prescribe most?
In 2024 Medicare Part D data, Dr. Cassis' most prescribed drugs by claims were Latanoprost, Prednisolone Acetate and Ketorolac Tromethamine.
Has Dr. Stephen Paul Cassis received payments from drug or device companies?
CMS Open Payments shows $9,130 in general payments to Dr. Cassis from 20 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Stephen Paul Cassis been practicing?
Dr. Cassis graduated from medical school in 1978, 48 years ago.
What insurance does Dr. Stephen Paul Cassis accept?
Dr. Cassis is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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