Oi Y. Chung, NP, PA
- Part D claims, 2024
- 1,120
- Hospital affiliations
- 1
- Industry payments
- $1,518
- Medical group
- 1
- State license
- 1
- Practice address
- 2201 West Lampasas Street, Ennis, TX 75119
- Practice phone
- Call (972) 875-0900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Oi Chung's professional email, personal email and mobile number
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Oi Y. Chung is a physician assistant in Ennis, Texas
Oi Chung practices at Ennis Regional Medical Center in Ennis, Texas, part of Lifepoint Health.
Oi Chung's NPI, 1104085893, was assigned on June 6, 2008. Oi Chung holds California license PA19610.
- NPI
- 1104085893NPI Registry (opens in a new tab)
- NPI enumeration date
- June 6, 2008
- NPI status
- Active
- Practice phone
- (972) 875-0900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Oi Y. Chung practices at Ennis Regional Medical Center in Ennis, Texas
Oi Chung's primary practice is Ennis Regional Medical Center, at 2201 West Lampasas Street, Ennis, TX 75119 in Ellis County. The practice phone is (972) 875-0900.
- Ennis Regional Medical Center2201 West Lampasas Street, Ennis, TX 75119 · Ellis CountyPhone(972) 875-0900
Source: Dmand AI Affiliation Data
Oi Y. Chung is affiliated with 2 sites of care and 1 medical group
Oi Chung's primary practice is Ennis Regional Medical Center in Ennis, Texas, part of Lifepoint Health. The medical group on file is Global Gastroenterology Group. Dmand AI also links Oi Chung to 1 more breast imaging center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Oi Y. Chung's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Oi Chung practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ennis Regional Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Lifepoint Health and 6.2K+ hospitals, with verified contacts in the same login.
Oi Y. Chung is one of 8,663 physician assistants in Texas
Physician assistant is Oi Chung's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Oi Chung is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Oi Chung is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Oi Chung
Counts of physician assistants 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
Oi Y. Chung's patients have a median age of 53
Across all payers, Dmand AI patient panel data puts Oi Chung's median patient age at 53, with 48% women.
Oi Chung's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women48%
- Men48%
Source: Dmand AI Patient Panel Data
Oi Y. Chung wrote 1,120 Medicare Part D claims in 2024
In 2024, Oi Chung wrote 1,120 Medicare Part D claims for 466 patients. 69% of them were for generic drugs. CMS names the drug for 1,003 of them, across 23 drugs with 11 or more claims each, at $328,901 in total drug cost.
Oi Chung's Part D claims by kind of drug, 2024
- Generic775 claims69%
- Brand-name345 claims31%
Oi Chung'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 Oi Chung's Part D claims, 2024
- Antibiotics5%61 of 1,120 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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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Oi Y. Chung received $1,518 in industry payments from 2024 to 2025
CMS Open Payments shows 45 general payments to Oi Chung from 6 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $724.
General payments to Oi Chung by program year, 2024 to 2025
Companies that paid Oi Chung the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Oi Y. Chung is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Oi Y. Chung'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 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) |
| 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 Oi Y. Chung
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Oi Y. Chung's NPI number?
Oi Y. Chung's NPI number is 1104085893. It was assigned on June 6, 2008, and it is active in the NPI Registry.
What does Oi Y. Chung specialize in?
Oi Y. Chung is a physician assistant in Ennis, Texas. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Oi Y. Chung practice?
Oi Chung practices at 2201 West Lampasas Street, Ennis, TX 75119. Oi Chung's primary practice is Ennis Regional Medical Center in Ennis, Texas, part of Lifepoint Health. Dmand AI also links Oi Chung to 1 breast imaging center.
What is Oi Y. Chung's office phone number?
The practice phone on file for Oi Chung is (972) 875-0900.
What is Oi Y. Chung's medical license number?
Oi Chung holds California license PA19610.
Which hospitals is Oi Y. Chung affiliated with?
Oi Chung practices at Ennis Regional Medical Center in Ennis, Texas.
What medical group is Oi Y. Chung part of?
Oi Chung is linked to Global Gastroenterology Group.
Is Oi Y. Chung board certified?
Yes. Oi Chung is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What drugs does Oi Y. Chung prescribe most?
In 2024 Medicare Part D data, Oi Chung's most prescribed drugs by claims were Vemlidy, Gavilyte-G and Tenofovir Disoproxil Fumarate.
Has Oi Y. Chung received payments from drug or device companies?
CMS Open Payments shows $1,518 in general payments to Oi Chung from 6 companies from 2024 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Oi Y. Chung been practicing?
Oi Chung's NPI was assigned in 2008.
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