Dr. Thomas Won Cho, MD
- Medicare services, 2024
- 410
- Medicare patients, 2024
- 307
- Part D claims, 2024
- 248
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 999 San Bernardino Road, Upland, CA 91786
- Practice phone
- Call (909) 985-2811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Cho'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. Thomas Won Cho is an emergency medicine physician in Upland, California
Dr. Cho practices at San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital.
Dr. Cho's NPI, 1366620940, was assigned on February 5, 2008. Dr. Cho graduated from Loma Linda University School Of Medicine in 2004. Dr. Cho holds California license A97792.
- NPI
- 1366620940NPI Registry (opens in a new tab)
- NPI enumeration date
- February 5, 2008
- NPI status
- Active
- Practice phone
- (909) 985-2811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas Won Cho practices at San Antonio Regional Hospital in Upland, California
Dr. Cho's primary practice is San Antonio Regional Hospital, at 999 San Bernardino Road, Upland, CA 91786 in San Bernardino County. The practice phone is (909) 985-2811.
- San Antonio Regional Hospital999 San Bernardino Road, Upland, CA 91786 · San Bernardino CountyPhone(909) 985-2811
Source: Dmand AI Affiliation Data
Dr. Thomas Won Cho is affiliated with 2 sites of care and 3 medical groups
Dr. Cho's primary practice is San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital. Dr. Cho is also affiliated with Loma Linda University Medical Center. The medical group on file is Vituity. Dmand AI also links Dr. Cho to 2 more medical groups, 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. Thomas Won Cho's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cho practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Antonio Regional Hospital | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Won Cho is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Cho's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Cho is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Cho is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Cho
Counts of emergency medicine physicians 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. Thomas Won Cho billed Medicare for 410 services in 2024
CMS data shows 410 Medicare services from Dr. Cho across 4 procedure codes in 2024, for 307 Medicare patients. Medicare paid $32,513 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Cho's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2102024: 23612%
- Tests and treatments
- 2023: 1522024: 17414%
Dr. Cho compared with the California median for emergency medicine physicians, 2024
- Dr. Cho
- California median
- Medicare services
- 410vs 26555% above
- Medicare patients
- 307vs 24326% above
- Part D claims
- 132vs 622.1 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Cho'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.
Need commercial claims for Dr. Cho?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Cho and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Won Cho treated 307 Medicare patients in 2024, average age 72
CMS counts 307 Medicare patients who saw Dr. Cho in 2024. The largest group is 65 to 74, with 125 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 54% are also on Medicaid. Their average risk score is 2.41, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Cho's median patient age at 51, with 57% women.
Dr. Cho's Medicare patients by age, 2024
Dr. Cho's Medicare patients by sex, 2024
- Women17958%
- Men12842%
Chronic conditions among Dr. Cho's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes55%
- Arthritis51%
- Chronic kidney disease45%
- Ischemic heart disease40%
- Anxiety37%
- Heart failure37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cho's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Won Cho wrote 248 Medicare Part D claims in 2024
In 2024, Dr. Cho wrote 248 Medicare Part D claims for 155 patients. 92% of them were for generic drugs. CMS names the drug for 132 of them, across 6 drugs with 11 or more claims each, at $839 in total drug cost. In 2023, CMS named 71 claims across 3 drugs.
Dr. Cho's Part D claims by kind of drug, 2024
- Generic229 claims92%
- Brand-name and other19 claims8%
Dr. Cho'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. Cho's Part D claims, 2024
- Opioids18%45 of 248 claims
- Antibiotics24%60 of 248 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: 712024: 13286%
Drugs named by CMS: 6 in 2024, 3 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
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Dr. Thomas Won Cho has 1 publication on record
Dmand AI links 1 paper to Dr. Cho. Dr. Cho's most frequent co-author is Hung B. Nguyen, MD.
Dr. Cho's most frequent co-authors
Recent publications by Dr. Cho
See who Dr. Cho researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Cho works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas Won Cho received $207 in industry payments from 2018 to 2025
CMS Open Payments shows 3 general payments to Dr. Cho from 3 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Ceribell, Inc. paid the most, $176.
General payments to Dr. Cho by program year, 2018 to 2025
Companies that paid Dr. Cho the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Won Cho graduated from Loma Linda University School Of Medicine
Dr. Cho graduated from Loma Linda University School Of Medicine in 2004.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Thomas Won Cho accepts plans from 2 insurance carriers
Dr. Cho is in network with 2 carriers, including GA State Medicaid and WI State Medicaid. Medicaid plans come from the most carriers, 2. Check the plan with the practice before a visit.
- GA State Medicaid
- WI State Medicaid
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas Won Cho'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) |
| Publications, topics and co-authors | PubMed (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 |
| 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. Thomas Won Cho
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. Thomas Won Cho's NPI number?
Dr. Thomas Won Cho's NPI number is 1366620940. It was assigned on February 5, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Won Cho?
Dr. Thomas Won Cho is an emergency medicine physician in Upland, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Thomas Won Cho practice?
Dr. Cho practices at 999 San Bernardino Road, Upland, CA 91786. Dr. Cho's primary practice is San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital. Dmand AI also links Dr. Cho to 2 medical groups.
What is Dr. Thomas Won Cho's office phone number?
The practice phone on file for Dr. Cho is (909) 985-2811.
What is Dr. Thomas Won Cho's medical license number?
Dr. Cho holds California license A97792.
Which hospitals is Dr. Thomas Won Cho affiliated with?
Dr. Cho practices at San Antonio Regional Hospital in Upland, California. Dr. Cho is also affiliated with Loma Linda University Medical Center.
What medical group is Dr. Thomas Won Cho part of?
Dr. Cho is linked to Vituity. Dmand AI links Dr. Cho to 2 more medical groups.
Does Dr. Thomas Won Cho accept Medicare?
Yes. CMS data shows Dr. Cho billed Medicare for 410 services in 2024.
How many Medicare patients does Dr. Thomas Won Cho see?
CMS counts 307 Medicare patients who saw Dr. Cho in 2024, with an average age of 72.
Is Dr. Thomas Won Cho board certified?
Yes. Dr. Cho is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Thomas Won Cho bill to Medicare?
In 2024, Dr. Cho's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Thomas Won Cho go to medical school?
Dr. Cho graduated from Loma Linda University School Of Medicine in 2004.
What drugs does Dr. Thomas Won Cho prescribe most?
In 2024 Medicare Part D data, Dr. Cho's most prescribed drugs by claims were Ondansetron ODT, Hydrocodone-Acetaminophen and Cephalexin.
Has Dr. Thomas Won Cho received payments from drug or device companies?
CMS Open Payments shows $207 in general payments to Dr. Cho from 3 companies from 2018 to 2025. The largest total came from Ceribell, Inc.
How long has Dr. Thomas Won Cho been practicing?
Dr. Cho graduated from medical school in 2004, 22 years ago.
Does Dr. Thomas Won Cho do research?
Dmand AI links 1 publication to Dr. Cho.
Who does Dr. Thomas Won Cho publish with?
Dr. Cho's most frequent co-authors are Hung B. Nguyen, MD (1 shared paper).
What insurance does Dr. Thomas Won Cho accept?
Dr. Cho is in network with 2 carriers, including GA State Medicaid and WI State Medicaid. Medicaid plans come from the most carriers, 2. Check the plan with the practice before a visit.
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