Dr. Won-Seok Jo, MD
- Medicare services, 2024
- 622
- Medicare patients, 2024
- 374
- Part D claims, 2024
- 2,399
- Hospital affiliations
- 2
- Industry payments
- $8,689
- Practice address
- 10408 Industrial Circle, Redlands, CA 92374
- Practice phone
- Call (909) 796-7803
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mountain View Surgery Center - Redlands
Surgery Center - Medicare-Certified · Redlands, California
Find Dr. Jo'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. Won-Seok Jo is a gastroenterologist in Redlands, California
Dr. Jo practices at Mountain View Surgery Center - Redlands in Redlands, California.
Dr. Jo's NPI, 1245215144, was assigned on December 13, 2005. Dr. Jo graduated from University of California, San Diego School of Medicine in 1999. Dr. Jo holds California license A91260.
- NPI
- 1245215144NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961448667
- NPI enumeration date
- December 13, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 796-7803
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Won-Seok Jo practices at Mountain View Surgery Center - Redlands in Redlands, California
Dr. Jo's primary practice is Mountain View Surgery Center - Redlands, at 10408 Industrial Circle, Redlands, CA 92374. The practice phone is (909) 796-7803.
- Mountain View Surgery Center - Redlands10408 Industrial Circle, Redlands, CA 92374Phone(909) 796-7803
Source: Dmand AI Affiliation Data
Dr. Won-Seok Jo is affiliated with 4 sites of care
Dr. Jo's primary practice is Mountain View Surgery Center - Redlands in Redlands, California. Dr. Jo is also affiliated with Dignity Health - St. Bernardine Medical Center. Dmand AI also links Dr. Jo to 1 more hospital and 1 physician office, 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. Won-Seok Jo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jo practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mountain View Surgery Center - Redlands | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Won-Seok Jo is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Jo's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Jo is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Jo
Counts of gastroenterologists 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. Won-Seok Jo billed Medicare for 622 services in 2024
CMS data shows 622 Medicare services from Dr. Jo across 10 procedure codes in 2024, for 374 Medicare patients. Medicare paid $74,325 for them.
Dr. Jo's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2192024: 33553%
- Office and hospital visits
- 2023: 1822024: 24233%
- Other services
- 2023: 372024: 4522%
Where Dr. Jo's Medicare services took place, 2024
- In an office24239%
- In a facility38061%
Dr. Jo compared with the California median for gastroenterologists, 2024
- Dr. Jo
- California median
- Medicare services
- 622vs 5866% above
- Medicare patients
- 374vs 30224% above
- Part D claims
- 2,228vs 3805.9 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Jo'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. Jo and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Won-Seok Jo treated 374 Medicare patients in 2024, average age 71
CMS counts 374 Medicare patients who saw Dr. Jo in 2024. The largest group is 65 to 74, with 200 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 46% are also on Medicaid. Their average risk score is 1.22, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Jo's median patient age at 60, with 57% women.
Dr. Jo's Medicare patients by age, 2024
Dr. Jo's Medicare patients by sex, 2024
- Women21758%
- Men15742%
Chronic conditions among Dr. Jo's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis41%
- Diabetes32%
- Mood disorders25%
- Chronic kidney disease23%
- Depression22%
- Anxiety21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Jo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Won-Seok Jo wrote 2,399 Medicare Part D claims in 2024
In 2024, Dr. Jo wrote 2,399 Medicare Part D claims for 1,073 patients. 76% of them were for generic drugs. CMS names the drug for 2,228 of them, across 31 drugs with 11 or more claims each, at $192,333 in total drug cost. In 2023, CMS named 1,994 claims across 31 drugs.
Dr. Jo's Part D claims by kind of drug, 2024
- Generic1,819 claims76%
- Brand-name580 claims24%
Dr. Jo'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. Jo's Part D claims, 2024
- Antibiotics4%91 of 2,399 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: 1,9942024: 2,22812%
Drugs named by CMS: 31 in 2024, 31 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. Won-Seok Jo ranks in the 98th percentile for colonoscopy in Medicare
Dr. Jo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 375 procedures of colonoscopy by Dr. Jo, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Jo ranks in Medicare procedure volume
- Colonoscopy
- 98th percentile375 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 89th percentile184 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Won-Seok Jo received $8,689 in industry payments from 2016 to 2025
CMS Open Payments shows 527 general payments to Dr. Jo from 33 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Gilead Sciences, Inc. paid the most, $1,410.
General payments to Dr. Jo by program year, 2016 to 2025
General payments to Dr. Jo by kind, 2016 to 2025
- Food and beverage$8,51598%
- Device or supply loans$1181%
- Education$330%
- Consulting fees$230%
Companies that paid Dr. Jo 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. Won-Seok Jo graduated from University of California, San Diego School of Medicine
Dr. Jo graduated from University of California, San Diego School of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Won-Seok Jo'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)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. Won-Seok Jo
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. Won-Seok Jo's NPI number?
Dr. Won-Seok Jo's NPI number is 1245215144. It was assigned on December 13, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Won-Seok Jo?
Dr. Won-Seok Jo is a gastroenterologist in Redlands, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Won-Seok Jo practice?
Dr. Jo practices at 10408 Industrial Circle, Redlands, CA 92374. Dr. Jo's primary practice is Mountain View Surgery Center - Redlands in Redlands, California. Dmand AI also links Dr. Jo to 1 hospital and 1 physician office.
What is Dr. Won-Seok Jo's office phone number?
The practice phone on file for Dr. Jo is (909) 796-7803.
What is Dr. Won-Seok Jo's medical license number?
Dr. Jo holds California license A91260.
Which hospitals is Dr. Won-Seok Jo affiliated with?
Dr. Jo is affiliated with Dignity Health - St. Bernardine Medical Center. Dmand AI links Dr. Jo to 1 more hospital.
Does Dr. Won-Seok Jo accept Medicare?
Yes. CMS data shows Dr. Jo billed Medicare for 622 services in 2024, and Dr. Jo accepts Medicare assignment.
How many Medicare patients does Dr. Won-Seok Jo see?
CMS counts 374 Medicare patients who saw Dr. Jo in 2024, with an average age of 71.
What services does Dr. Won-Seok Jo bill to Medicare?
In 2024, Dr. Jo's most billed Medicare services were surgery: digestive system (43239), surgery: digestive system (45385) and office visit, new patient (99204).
Where did Dr. Won-Seok Jo go to medical school?
Dr. Jo graduated from University of California, San Diego School of Medicine in 1999.
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What drugs does Dr. Won-Seok Jo prescribe most?
In 2024 Medicare Part D data, Dr. Jo's most prescribed drugs by claims were Gavilyte-G, Peg-3350 And Electrolytes and Omeprazole.
Has Dr. Won-Seok Jo received payments from drug or device companies?
CMS Open Payments shows $8,689 in general payments to Dr. Jo from 33 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Won-Seok Jo been practicing?
Dr. Jo graduated from medical school in 1999, 27 years ago.
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