A Phase 3 Study in Participants With Moderate to Severe Psoriasis (UNCOVER-2) (opens in a new tab)
Completed
$512 in research paymentsPsoriasisSkin Diseases, Papulosquamous50 mg etanercept80 mg ixekizumab Dosing Regimen
Dr. William T. Ko, MD
NPI1841230976PAC ID8527251669
- Medicare services, 2024
- 25,816
- Medicare patients, 2024
- 780
- Part D claims, 2024
- 1,368
- Clinical trials
- 1
- MIPS score, 2024
- 83
- Practice address
- 4835 E Cactus Rd, Scottsdale, AZ 85254
- Practice phone
- Call (480) 905-8485
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arizona Dermatology
Scottsdale, Arizona
Find Dr. Ko's 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. William T. Ko is a dermatologist in Scottsdale, Arizona
Dr. Ko practices at Arizona Dermatology in Scottsdale, Arizona.
Dr. Ko's NPI, 1841230976, was assigned on June 7, 2006. Dr. Ko graduated from Northeastern Ohio University College of Medicine in 1994. Dr. Ko holds Arizona license 26333.
NPI and contact details
- NPI
- 1841230976NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527251669
- NPI enumeration date
- June 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 905-8485
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William T. Ko practices at Arizona Dermatology in Scottsdale, Arizona
Dr. Ko's primary practice is Arizona Dermatology, at 4835 E Cactus Rd, Scottsdale, AZ 85254 in Maricopa County. The practice phone is (480) 905-8485.
- Arizona Dermatology4835 E Cactus Rd, Scottsdale, AZ 85254 · Maricopa CountyPhone(480) 905-8485
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William T. Ko is affiliated with 3 sites of care and 2 medical groups
Dr. Ko's primary practice is Arizona Dermatology in Scottsdale, Arizona. The medical group on file is Arizona Dermatology. Dmand AI also links Dr. Ko to 2 more group practices and clinics and 1 medical group, each named with a free account.
Arizona DermatologyPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William T. Ko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ko practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arizona Dermatology | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William T. Ko is one of 269 dermatologists in Arizona
Dermatology is Dr. Ko's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Ko is licensed in Arizona.
Specialties and state licenses
- Dermatology, ArizonaPrimary
Dermatologists near Dr. Ko
Counts of dermatologists 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. William T. Ko billed Medicare for 25,816 services in 2024
CMS data shows 25,816 Medicare services from Dr. Ko across 34 procedure codes in 2024, for 780 Medicare patients. Medicare paid $608,791 for them. Every service was in an office.
Medicare services, 202425,816
Medicare patients780
Paid by Medicare$608,791
Procedure codes34
Dr. Ko's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 19,8242024: 16,06619%
- Surgery
- 2023: 8,7632024: 8,3235%
- Office and hospital visits
- 2023: 1,4522024: 1,3229%
- Tests and treatments
- 2023: 1132024: 1057%
- Imaging
- 2023: 932024: 0100%
Dr. Ko compared with the Arizona median for dermatologists, 2024
- Dr. Ko
- Arizona median
- Medicare services
- 25,816vs 3,5667.2 times
- Medicare patients
- 780vs 69812% above
- Part D claims
- 1,234vs 4702.6 times
Medians across 254 dermatologists in Arizona with Dmand AI profiles that report each measure.
Dr. Ko'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. Ko and other dermatologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William T. Ko treated 780 Medicare patients in 2024, average age 77
CMS counts 780 Medicare patients who saw Dr. Ko in 2024. The largest group is 75 to 84, with 390 patients. 75% of them have high cholesterol, and 65% 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 Dr. Ko's median patient age at 74, with 52% women.
Medicare patients, 2024780
Average age77
Average risk score1.02
Dr. Ko's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ko's Medicare patients by sex, 2024
- Women37748%
- Men40352%
Chronic conditions among Dr. Ko's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis46%
- Ischemic heart disease27%
- Chronic kidney disease22%
- Cancer19%
- Diabetes18%
- Osteoporosis18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ko'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
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William T. Ko wrote 1,368 Medicare Part D claims in 2024
In 2024, Dr. Ko wrote 1,368 Medicare Part D claims for 643 patients. 92% of them were for generic drugs. CMS names the drug for 1,234 of them, across 22 drugs with 11 or more claims each, at $372,560 in total drug cost. In 2023, CMS named 1,162 claims across 23 drugs.
Part D claims, 20241,368
Drugs named by CMS22
Total drug cost$372,560
Part D patients643
Dr. Ko's Part D claims by kind of drug, 2024
- Generic1,259 claims92%
- Brand-name109 claims8%
Dr. Ko'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.
Drug classes CMS tracks in Dr. Ko's Part D claims, 2024
- Opioids2%21 of 1,368 claims
- Antibiotics4%52 of 1,368 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: 1,1622024: 1,2346%
Drugs named by CMS: 22 in 2024, 23 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. William T. Ko scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Ko for performance year 2024, reported as part of a group. Dr. Ko accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 930 procedures of skin biopsy by Dr. Ko, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Ko's MIPS scores, performance year 2024
- 83of 100Final score
- 82.3of 100Quality
- 83of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Ko ranks in Medicare procedure volume
- Removal of skin lesions
- 98th percentile2,084 procedures
- Skin biopsy
- 99th percentile930 procedures
- Removal of skin cancer
- 58th percentile474 procedures
- Melanoma (skin cancer) excision
- 89th percentile67 procedures
- Removal or shaving of skin growth
- 68th percentile15 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 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. William T. Ko has worked on 1 clinical trial
Dmand AI links Dr. Ko to 1 clinical trial. Conditions studied include Psoriasis and Skin Diseases, Papulosquamous. Open Payments lists research payments to Dr. Ko that name 1 trial.
Conditions in Dr. Ko's trials
- Psoriasis
- Skin Diseases, Papulosquamous
Investigators on the most trials with Dr. Ko
- William Abramovits, MD1 shared trial
- Mira Baron, MD, CPI1 shared trial
- Daniel Anthony Carrasco, MD1 shared trial
Recent clinical trials with Dr. Ko
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. William T. Ko received $148,480 in industry payments from 2016 to 2025
CMS Open Payments shows 1,492 general payments to Dr. Ko from 51 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 74% of the total. Celgene Corporation paid the most, $50,952. It also lists 3 research payments totaling $543 from 2017 to 2018, naming 1 clinical trial.
General payments to Dr. Ko by program year, 2016 to 2025
General payments to Dr. Ko by kind, 2016 to 2025
$148.5Kin total
- Speaker and faculty fees$109,56474%
- Food and beverage$29,74920%
- Consulting fees$3,6702%
- Education speaker fees$2,5002%
- Other$2,9972%
Companies that paid Dr. Ko 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 T. Ko graduated from Northeastern Ohio University College of Medicine
Dr. Ko graduated from Northeastern Ohio University College of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William T. Ko's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William T. Ko
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 T. Ko's NPI number?
Dr. William T. Ko's NPI number is 1841230976. It was assigned on June 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William T. Ko?
Dr. William T. Ko is a dermatologist in Scottsdale, Arizona. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. William T. Ko practice?
Dr. Ko practices at 4835 E Cactus Rd, Scottsdale, AZ 85254. Dr. Ko's primary practice is Arizona Dermatology in Scottsdale, Arizona. Dmand AI also links Dr. Ko to 2 group practices and clinics and 1 medical group.
What is Dr. William T. Ko's office phone number?
The practice phone on file for Dr. Ko is (480) 905-8485.
What is Dr. William T. Ko's medical license number?
Dr. Ko holds Arizona license 26333.
What medical group is Dr. William T. Ko part of?
Dr. Ko is linked to Arizona Dermatology. Dmand AI links Dr. Ko to 1 more medical group.
Does Dr. William T. Ko accept Medicare?
Yes. CMS data shows Dr. Ko billed Medicare for 25,816 services in 2024, and Dr. Ko accepts Medicare assignment.
What is Dr. William T. Ko's MIPS score?
Dr. Ko's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
How many Medicare patients does Dr. William T. Ko see?
CMS counts 780 Medicare patients who saw Dr. Ko in 2024, with an average age of 77.
What services does Dr. William T. Ko bill to Medicare?
In 2024, Dr. Ko's most billed Medicare services were injected or infused drug (J7345), surgery: skin and soft tissue (17003) and office visit, established patient (99213).
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Where did Dr. William T. Ko go to medical school?
Dr. Ko graduated from Northeastern Ohio University College of Medicine in 1994.
What drugs does Dr. William T. Ko prescribe most?
In 2024 Medicare Part D data, Dr. Ko's most prescribed drugs by claims were Mupirocin, Ketoconazole and Valacyclovir.
Has Dr. William T. Ko received payments from drug or device companies?
CMS Open Payments shows $148,480 in general payments to Dr. Ko from 51 companies from 2016 to 2025. The largest total came from Celgene Corporation.
How long has Dr. William T. Ko been practicing?
Dr. Ko graduated from medical school in 1994, 32 years ago.
Does Dr. William T. Ko do research?
Dr. Ko has worked on 1 clinical trial.
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