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Physician Profile

John C. Ong, DO

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Where to find John C. Ong, DO

About Dr. Ong

John C. Ong, DO practices nephrology in Fountain Valley, CA. The provider's National Provider Identifier (NPI) is 1477056406.

Factual summary compiled by Guide.md from public records; not written by this provider.

Education & Training

Medical School Other Graduated: 2020

Specialty

Nephrology (Primary)

Credentials & Licensing

CA · Osteopathic Physician and Surgeon 20AOsteopathic Medical Board of California
No. 21125CurrentExpires May 2027Since 2023
CA licenceAs reported to the NPI registry
No. 20A21125As reported
NPINational Provider Identifier
1477056406Issued 2018

Snapshot · verify with the board ↗

Medicare information

Accepts Medicare assignmentYes
Telehealth reported to CMSYes
Medicare opt-outNo
Can order and refer in MedicareYes

Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.

Common questions

What does Dr. Ong specialize in?

Dr. Ong is a kidney specialist in Fountain Valley, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nephrology”.

NPI registry

Where is Dr. Ong located?

Dr. Ong is listed at 11100 Warner Ave Ste 218, Fountain Valley, CA 92708. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

What is Dr. Ong's phone number?

The number on file is (714) 641-9696. Contact the office directly to confirm availability and scheduling.

NPI registry

What is Dr. Ong's NPI number?

Dr. Ong's National Provider Identifier is 1477056406. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

Where did Dr. Ong go to medical school?

Dr. Ong attended Other, graduating in 2020. This comes from the CMS National Downloadable File.

CMS public data

How long has Dr. Ong been practicing?

Dr. Ong has 6 years experience. Calculated from a graduation year of 2020, reported in the CMS National Downloadable File.

CMS public data

Has Dr. Ong confirmed this information?

Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ong. If this is you, claiming it is free.

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