Ja Eun Koo
- Medicare services, 2024
- 358
- Medicare patients, 2024
- 113
- Part D claims, 2024
- 294
- MIPS score, 2024
- 89
- Hospital affiliations
- 1
- Practice address
- 11234 Anderson St, Loma Linda, CA 92354
- Practice phone
- Call (909) 558-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Ja Eun Koo'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.
Ja Eun Koo is an internist in Loma Linda, California
Ja Eun Koo practices at Loma Linda University Medical Center in Loma Linda, California, part of Seventh-day Adventist Church.
Ja Eun Koo's NPI, 1558700187, was assigned on June 17, 2013. Ja Eun Koo graduated from West Virginia University School of Medicine in 2013. Ja Eun Koo holds California license A137368.
- NPI
- 1558700187NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092956078
- NPI enumeration date
- June 17, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 558-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Ja Eun Koo practices at Loma Linda University Medical Center in Loma Linda, California
Ja Eun Koo's primary practice is Loma Linda University Medical Center, at 11234 Anderson St, Loma Linda, CA 92354 in San Bernardino County. The practice phone is (909) 558-4000.
- Loma Linda University Medical Center11234 Anderson St, Loma Linda, CA 92354 · San Bernardino CountyPhone(909) 558-4000
Source: Dmand AI Affiliation Data
Ja Eun Koo is affiliated with 1 site of care and 1 medical group
Ja Eun Koo's primary practice is Loma Linda University Medical Center in Loma Linda, California, part of Seventh-day Adventist Church. The medical group on file is Loma Linda University Faculty Medical Group (LLUFMG).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Ja Eun Koo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Ja Eun Koo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Loma Linda University Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Seventh-day Adventist Church and 6.2K+ hospitals, with verified contacts in the same login.
Ja Eun Koo is one of 16,751 internists in California
Internal medicine is Ja Eun Koo's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Ja Eun Koo is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Ja Eun Koo
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
Ja Eun Koo billed Medicare for 358 services in 2024
CMS data shows 358 Medicare services from Ja Eun Koo across 3 procedure codes in 2024, for 113 Medicare patients. Medicare paid $25,123 for them. Every service was in a facility, such as a hospital, rather than an office.
Ja Eun Koo's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3712024: 3584%
Ja Eun Koo compared with the California median for internists, 2024
- Ja Eun Koo
- California median
- Medicare services
- 358vs 361Close to median
- Medicare patients
- 113vs 15125% below
- Part D claims
- 39vs 42191% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Ja Eun Koo'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 Ja Eun Koo and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Ja Eun Koo treated 113 Medicare patients in 2024, average age 68
CMS counts 113 Medicare patients who saw Ja Eun Koo in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 65% are also on Medicaid. Their average risk score is 3.46, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Ja Eun Koo's median patient age at 62, with 51% women.
Ja Eun Koo's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Ja Eun Koo's Medicare patients by sex, 2024
- Women7264%
- Men4136%
Chronic conditions among Ja Eun Koo's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Diabetes55%
- Chronic kidney disease50%
- Arthritis47%
- Heart failure43%
- Mood disorders41%
- Depression39%
Share of Medicare patients with each condition. A patient can have several.
Ja Eun Koo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Ja Eun Koo wrote 294 Medicare Part D claims in 2024
In 2024, Ja Eun Koo wrote 294 Medicare Part D claims for 96 patients. 86% of them were for generic drugs. CMS names the drug for 39 of them, across 3 drugs with 11 or more claims each, at $275 in total drug cost. In 2023, CMS named 41 claims across 3 drugs.
Ja Eun Koo's Part D claims by kind of drug, 2024
- Generic254 claims86%
- Brand-name and other40 claims14%
Ja Eun Koo'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 Ja Eun Koo's Part D claims, 2024
- Opioids9%26 of 294 claims
- Antibiotics16%48 of 294 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: 412024: 395%
Drugs named by CMS: 3 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
Ja Eun Koo scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Ja Eun Koo for performance year 2024, reported as part of a group. Ja Eun Koo accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Ja Eun Koo's MIPS scores, performance year 2024
- 89of 100Final score
- 72.1of 100Quality
- 80of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 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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Ja Eun Koo received $118 in industry payments from 2021 to 2025
CMS Open Payments shows 2 general payments to Ja Eun Koo from 2 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $92.
General payments to Ja Eun Koo by program year, 2021 to 2025
Companies that paid Ja Eun Koo the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Ja Eun Koo graduated from West Virginia University School of Medicine
Ja Eun Koo graduated from West Virginia University School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Ja Eun Koo'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)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 |
| 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 Ja Eun Koo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Ja Eun Koo's NPI number?
Ja Eun Koo's NPI number is 1558700187. It was assigned on June 17, 2013, and it is active in the NPI Registry.
What does Ja Eun Koo specialize in?
Ja Eun Koo is an internist in Loma Linda, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Ja Eun Koo practice?
Ja Eun Koo practices at 11234 Anderson St, Loma Linda, CA 92354. Ja Eun Koo's primary practice is Loma Linda University Medical Center in Loma Linda, California, part of Seventh-day Adventist Church.
What is Ja Eun Koo's office phone number?
The practice phone on file for Ja Eun Koo is (909) 558-4000.
What is Ja Eun Koo's medical license number?
Ja Eun Koo holds California license A137368.
Which hospitals is Ja Eun Koo affiliated with?
Ja Eun Koo practices at Loma Linda University Medical Center in Loma Linda, California.
What medical group is Ja Eun Koo part of?
Ja Eun Koo is linked to Loma Linda University Faculty Medical Group (LLUFMG).
Does Ja Eun Koo accept Medicare?
Yes. CMS data shows Ja Eun Koo billed Medicare for 358 services in 2024, and Ja Eun Koo accepts Medicare assignment.
What is Ja Eun Koo's MIPS score?
Ja Eun Koo's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
How many Medicare patients does Ja Eun Koo see?
CMS counts 113 Medicare patients who saw Ja Eun Koo in 2024, with an average age of 68.
Show 5 more questionsShow fewer questions
What services does Ja Eun Koo bill to Medicare?
In 2024, Ja Eun Koo's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Where did Ja Eun Koo go to medical school?
Ja Eun Koo graduated from West Virginia University School of Medicine in 2013.
What drugs does Ja Eun Koo prescribe most?
In 2024 Medicare Part D data, Ja Eun Koo's most prescribed drugs by claims were Ondansetron HCl, Famotidine and Hydrocodone-Acetaminophen.
Has Ja Eun Koo received payments from drug or device companies?
CMS Open Payments shows $118 in general payments to Ja Eun Koo from 2 companies from 2021 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Ja Eun Koo been practicing?
Ja Eun Koo graduated from medical school in 2013, 13 years ago.
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