Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John Christian Ong, DO

Individual provider Nephrology Physician · NPI 1477056406

John Christian Ong, DO is a 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

Other providers in Fountain Valley