Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John Christian Ong, DO

Individual provider Nephrology Physician · NPI 1477056406

John Christian Ong, DO practises Nephrology in Fountain Valley, California. Qualified in 2020, 6 years ago. Practices with Balboa Nephrology Medical Group Inc, a 79-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2018
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

11100 Warner Ave Ste 218
Fountain Valley, CA 92708-7511
Phone: (714) 641-9696
Fax: (714) 641-1211
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3100 N Tenaya Way, Las Vegas, NV 89128-0436 — (702) 824-7687

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 20A21125 (CA)

Record details

NPI number1477056406
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 15, 2018
Last updated in NPPESJanuary 16, 2026
Certification dateJanuary 16, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Balboa Nephrology Medical Group Inc — 79 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,393 17 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Balboa Nephrology Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 79 clinicians in the practice; 12 are shown here.

Other providers in Fountain Valley