Dr. John Christian Ong, DO
- Part D claims, 2024
- 86
- Hospital affiliations
- 3
- Industry payments
- $1,670
- Medical groups
- 2
- State license
- 1
- Practice address
- 11100 Warner Ave, Fountain Valley, CA 92708
- Practice phone
- Call (858) 810-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Balboa Nephrology Medical Group, Inc.
Fountain Valley, California
Find Dr. Ong'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. John Christian Ong is a nephrologist in Fountain Valley, California
Dr. Ong practices at Balboa Nephrology Medical Group, Inc. in Fountain Valley, California.
Dr. Ong's NPI, 1477056406, was assigned on March 15, 2018. Dr. Ong holds California license 20A21125.
- NPI
- 1477056406NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638593916
- NPI enumeration date
- March 15, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (858) 810-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Christian Ong practices at Balboa Nephrology Medical Group, Inc. in Fountain Valley, California
Dr. Ong's primary practice is Balboa Nephrology Medical Group, Inc., at 11100 Warner Ave, Fountain Valley, CA 92708 in Orange County. The practice phone is (858) 810-8000.
- Balboa Nephrology Medical Group, Inc.11100 Warner Ave, Fountain Valley, CA 92708 · Orange CountyPhone(858) 810-8000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Christian Ong is affiliated with 6 sites of care and 2 medical groups
Dr. Ong's primary practice is Balboa Nephrology Medical Group, Inc. in Fountain Valley, California. Dr. Ong is also affiliated with Orange Coast Medical Center. The medical group on file is Balboa Nephrology. Dmand AI also links Dr. Ong to 2 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Christian Ong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ong practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Balboa Nephrology Medical Group, Inc. | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Christian Ong is one of 1,401 nephrologists in California
Nephrology is Dr. Ong's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Ong is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Ong
Counts of nephrologists 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. John Christian Ong's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Ong's median patient age at 69, with 44% women.
Dr. Ong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women44%
- Men55%
Source: Dmand AI Patient Panel Data
Dr. John Christian Ong wrote 86 Medicare Part D claims in 2024
In 2024, Dr. Ong wrote 86 Medicare Part D claims for 17 patients. 81% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $571 in total drug cost.
Dr. Ong's Part D claims by kind of drug, 2024
- Generic70 claims81%
- Brand-name16 claims19%
Dr. Ong'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.
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. John Christian Ong offers telehealth to Medicare patients
Dr. Ong accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ong as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John Christian Ong received $1,670 in industry payments from 2024 to 2025
CMS Open Payments shows 23 general payments to Dr. Ong from 7 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Aurinia Pharma U.S., Inc. paid the most, $853.
General payments to Dr. Ong by program year, 2024 to 2025
Companies that paid Dr. Ong the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Christian Ong'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. John Christian Ong
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. John Christian Ong's NPI number?
Dr. John Christian Ong's NPI number is 1477056406. It was assigned on March 15, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. John Christian Ong?
Dr. John Christian Ong is a nephrologist in Fountain Valley, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John Christian Ong practice?
Dr. Ong practices at 11100 Warner Ave, Fountain Valley, CA 92708. Dr. Ong's primary practice is Balboa Nephrology Medical Group, Inc. in Fountain Valley, California. Dmand AI also links Dr. Ong to 2 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. John Christian Ong's office phone number?
The practice phone on file for Dr. Ong is (858) 810-8000.
What is Dr. John Christian Ong's medical license number?
Dr. Ong holds California license 20A21125.
Which hospitals is Dr. John Christian Ong affiliated with?
Dr. Ong is affiliated with Orange Coast Medical Center. Dmand AI links Dr. Ong to 2 more hospitals.
What medical group is Dr. John Christian Ong part of?
Dr. Ong is linked to Balboa Nephrology. Dmand AI links Dr. Ong to 1 more medical group.
Does Dr. John Christian Ong accept Medicare?
Yes. CMS lists Dr. Ong as accepting Medicare assignment.
Does Dr. John Christian Ong offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ong as offering telehealth services.
What drugs does Dr. John Christian Ong prescribe most?
In 2024 Medicare Part D data, Dr. Ong's most prescribed drugs by claims were Bumetanide and Potassium Chloride.
Has Dr. John Christian Ong received payments from drug or device companies?
CMS Open Payments shows $1,670 in general payments to Dr. Ong from 7 companies from 2024 to 2025. The largest total came from Aurinia Pharma U.S., Inc.
How long has Dr. John Christian Ong been practicing?
Dr. Ong graduated from medical school in 2020, 6 years ago.
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