Dr. Julie Joohyun Oh, MD
- Medicare services, 2024
- 14
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 87
- MIPS score, 2024
- 87
- Hospital affiliations
- 2
- Practice address
- 9920 Talbert Avenue, Fountain Valley, CA 92708
- Practice phone
- Call (714) 378-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oh'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. Julie Joohyun Oh is an internist in Fountain Valley, California
Dr. Oh practices at Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
Dr. Oh's NPI, 1093389223, was assigned on May 12, 2021. Dr. Oh graduated from Texas A&M College of Medicine - Bryan in 2021. Dr. Oh holds California license A182579.
- NPI
- 1093389223NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244617504
- NPI enumeration date
- May 12, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 378-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Julie Joohyun Oh practices at Orange Coast Medical Center in Fountain Valley, California
Dr. Oh's primary practice is Orange Coast Medical Center, at 9920 Talbert Avenue, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 378-7000.
- Orange Coast Medical Center9920 Talbert Avenue, Fountain Valley, CA 92708 · Orange CountyPhone(714) 378-7000
Source: Dmand AI Affiliation Data
Dr. Julie Joohyun Oh is affiliated with 3 sites of care and 1 medical group
Dr. Oh's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Dr. Oh is also affiliated with Long Beach Medical Center. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Oh to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Julie Joohyun Oh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oh practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange Coast Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Julie Joohyun Oh is one of 16,751 internists in California
Internal medicine is Dr. Oh's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Oh is board certified in internal medicine by the American Board of Internal Medicine. Dr. Oh is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Oh
Counts of internists 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. Julie Joohyun Oh billed Medicare for 14 services in 2024
CMS data shows 14 Medicare services from Dr. Oh across 1 procedure code in 2024, for 22 Medicare patients. Medicare paid $2,000 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oh compared with the California median for internists, 2024
- Dr. Oh
- California median
- Medicare services
- 14vs 36196% below
- Medicare patients
- 22vs 15185% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Oh'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. Oh and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Julie Joohyun Oh treated 22 Medicare patients in 2024, average age 79
CMS counts 22 Medicare patients who saw Dr. Oh in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 2.29, 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. Oh's median patient age at 72, with 54% women.
Chronic conditions among Dr. Oh's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Anxiety50%
- Mood disorders50%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Julie Joohyun Oh wrote 87 Medicare Part D claims in 2024
In 2024, Dr. Oh wrote 87 Medicare Part D claims for 27 patients. 84% of them were for generic drugs.
Dr. Oh's Part D claims by kind of drug, 2024
- Generic73 claims84%
- Brand-name and other14 claims16%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Julie Joohyun Oh scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Oh for performance year 2024, reported as part of a group. Dr. Oh accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Oh's MIPS scores, performance year 2024
- 87of 100Final score
- 81.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Julie Joohyun Oh received $85 in industry payments in 2025
CMS Open Payments shows 4 general payments to Dr. Oh from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Bausch & Lomb Americas Inc. paid the most, $85.
Companies that paid Dr. Oh the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Julie Joohyun Oh graduated from Texas A&M College of Medicine - Bryan
Dr. Oh graduated from Texas A&M College of Medicine - Bryan in 2021.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Julie Joohyun Oh accepts plans from 14 insurance carriers
Dr. Oh is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Oh accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Julie Joohyun Oh'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 (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)Clinician Public Reporting: Overall MIPS Performance (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 |
| 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. Julie Joohyun Oh
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. Julie Joohyun Oh's NPI number?
Dr. Julie Joohyun Oh's NPI number is 1093389223. It was assigned on May 12, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Julie Joohyun Oh?
Dr. Julie Joohyun Oh is an internist in Fountain Valley, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Julie Joohyun Oh practice?
Dr. Oh practices at 9920 Talbert Avenue, Fountain Valley, CA 92708. Dr. Oh's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Dmand AI also links Dr. Oh to 1 group practice or clinic.
What is Dr. Julie Joohyun Oh's office phone number?
The practice phone on file for Dr. Oh is (714) 378-7000.
What is Dr. Julie Joohyun Oh's medical license number?
Dr. Oh holds California license A182579.
Which hospitals is Dr. Julie Joohyun Oh affiliated with?
Dr. Oh practices at Orange Coast Medical Center in Fountain Valley, California. Dr. Oh is also affiliated with Long Beach Medical Center.
What medical group is Dr. Julie Joohyun Oh part of?
Dr. Oh is linked to MemorialCare Medical Group.
Does Dr. Julie Joohyun Oh accept Medicare?
Yes. CMS data shows Dr. Oh billed Medicare for 14 services in 2024, and Dr. Oh accepts Medicare assignment.
What is Dr. Julie Joohyun Oh's MIPS score?
Dr. Oh's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Julie Joohyun Oh see?
CMS counts 22 Medicare patients who saw Dr. Oh in 2024, with an average age of 79.
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Is Dr. Julie Joohyun Oh board certified?
Yes. Dr. Oh is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Julie Joohyun Oh bill to Medicare?
In 2024, Dr. Oh's most billed Medicare services were hospital inpatient care (99223).
Where did Dr. Julie Joohyun Oh go to medical school?
Dr. Oh graduated from Texas A&M College of Medicine - Bryan in 2021.
Has Dr. Julie Joohyun Oh received payments from drug or device companies?
CMS Open Payments shows $85 in general payments to Dr. Oh from 1 company from 2025 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Dr. Julie Joohyun Oh been practicing?
Dr. Oh graduated from medical school in 2021, 5 years ago.
What insurance does Dr. Julie Joohyun Oh accept?
Dr. Oh is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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