Dr. Roy Pillsub Won, MD
- Part D claims, 2024
- 140
- Hospital affiliations
- 1
- Industry payments
- $10,485
- Medical groups
- 3
- State license
- 1
- Practice address
- 1950 Sunny Crest Dr, Fullerton, CA 92835
- Practice phone
- Call (714) 449-4900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Providence Medical Foundation
Fullerton, California
Find Dr. Won'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. Roy Pillsub Won is a colorectal surgeon in Fullerton, California
Dr. Won practices at Providence Medical Foundation in Fullerton, California.
Dr. Won's NPI, 1225470354, was assigned on July 17, 2013. Dr. Won graduated from University of Cincinnati College of Medicine in 2013. Dr. Won holds Texas license S6980.
- NPI
- 1225470354NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800182643
- NPI enumeration date
- July 17, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 449-4900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roy Pillsub Won practices at Providence Medical Foundation in Fullerton, California
Dr. Won's primary practice is Providence Medical Foundation, at 1950 Sunny Crest Dr, Fullerton, CA 92835 in Orange County. The practice phone is (714) 449-4900.
- Providence Medical Foundation1950 Sunny Crest Dr, Fullerton, CA 92835 · Orange CountyPhone(714) 449-4900
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Roy Pillsub Won is affiliated with 5 sites of care and 3 medical groups
Dr. Won's primary practice is Providence Medical Foundation in Fullerton, California. Dr. Won is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Won to 2 more ambulatory surgery centers, 2 medical groups and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Roy Pillsub Won's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Won practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Medical Foundation | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roy Pillsub Won is one of 187 colorectal surgeons in California
Colon and rectal surgery is Dr. Won's primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. Won is licensed in Texas.
Specialties and state licenses
- Colon and rectal surgery, TexasPrimary
Colorectal surgeons near Dr. Won
Counts of colorectal surgeons 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. Roy Pillsub Won's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Won's median patient age at 61, with 54% women.
Dr. Won's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women54%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. Roy Pillsub Won wrote 140 Medicare Part D claims in 2024
In 2024, Dr. Won wrote 140 Medicare Part D claims for 68 patients. 92% of them were for generic drugs. CMS names the drug for 98 of them, across 5 drugs with 11 or more claims each, at $1,339 in total drug cost. In 2023, CMS named 171 claims across 7 drugs.
Dr. Won's Part D claims by kind of drug, 2024
- Generic129 claims92%
- Brand-name11 claims8%
Dr. Won'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. Won's Part D claims, 2024
- Opioids19%27 of 140 claims
- Antibiotics32%45 of 140 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: 1712024: 9843%
Drugs named by CMS: 5 in 2024, 7 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. Roy Pillsub Won ranks in the 44th percentile for colonoscopy in Medicare
Dr. Won accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 14 procedures of colonoscopy by Dr. Won, more than 44% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Won ranks in Medicare procedure volume
- Colonoscopy
- 44th percentile14 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); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Roy Pillsub Won received $10,485 in industry payments from 2017 to 2023
CMS Open Payments shows 12 general payments to Dr. Won from 4 drug and device companies from 2017 to 2023. Education make up the largest share, 95% of the total. Intuitive Surgical, Inc. paid the most, $10,231.
General payments to Dr. Won by program year, 2017 to 2023
General payments to Dr. Won by kind, 2017 to 2023
- Education$10,00095%
- Food and beverage$4855%
Companies that paid Dr. Won the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Roy Pillsub Won graduated from University of Cincinnati College of Medicine
Dr. Won graduated from University of Cincinnati College of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Roy Pillsub Won'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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)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 Dr. Roy Pillsub Won
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. Roy Pillsub Won's NPI number?
Dr. Roy Pillsub Won's NPI number is 1225470354. It was assigned on July 17, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Roy Pillsub Won?
Dr. Roy Pillsub Won is a colorectal surgeon in Fullerton, California. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).
Where does Dr. Roy Pillsub Won practice?
Dr. Won practices at 1950 Sunny Crest Dr, Fullerton, CA 92835. Dr. Won's primary practice is Providence Medical Foundation in Fullerton, California. Dmand AI also links Dr. Won to 2 ambulatory surgery centers, 2 medical groups and 1 group practice or clinic.
What is Dr. Roy Pillsub Won's office phone number?
The practice phone on file for Dr. Won is (714) 449-4900.
What is Dr. Roy Pillsub Won's medical license number?
Dr. Won holds Texas license S6980.
Which hospitals is Dr. Roy Pillsub Won affiliated with?
Dr. Won is affiliated with Providence St. Jude Medical Center.
What medical group is Dr. Roy Pillsub Won part of?
Dr. Won is linked to St. Jude Heritage Medical Group. Dmand AI links Dr. Won to 2 more medical groups.
Does Dr. Roy Pillsub Won accept Medicare?
Yes. CMS lists Dr. Won as accepting Medicare assignment.
Where did Dr. Roy Pillsub Won go to medical school?
Dr. Won graduated from University of Cincinnati College of Medicine in 2013.
What drugs does Dr. Roy Pillsub Won prescribe most?
In 2024 Medicare Part D data, Dr. Won's most prescribed drugs by claims were Tramadol HCl, Sod Sulf-Potass Sulf-Mag Sulf and Metronidazole.
Has Dr. Roy Pillsub Won received payments from drug or device companies?
CMS Open Payments shows $10,485 in general payments to Dr. Won from 4 companies from 2017 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Roy Pillsub Won been practicing?
Dr. Won graduated from medical school in 2013, 13 years ago.
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