Doctor profile · Federal record
Dr. John Ong, DO
Nephrology Physician (CMS: Nephrology) · Fountain Valley, CA
- NPI 1477056406
- Accepts Medicare
- 6 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
11100 Warner Ave Ste 218
Fountain Valley, CA 927087511
(714) 641-9696
fax (714) 641-1211 - Additional location
-
3100 N Tenaya Way
Las Vegas, NV 891280436
(702) 824-7687 - Mailing address
-
9373 Hazard Way Ste 200
San Diego, CA 921231226
Credentials & registration
- NPI registered
- March 2018 — 8 yrs on file
- Profile last updated
- January 16, 2026
- Year of graduation
- 2020 — 6 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- California #20A21125
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1477056406. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$277
Transactions
6
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Aurinia Pharma U.S., Inc. | 6 | $276.65 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
0
Total drug cost
$206
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 12 | 0 | $206 |
Hospital affiliations
Frequently asked questions
What is Dr. John Ong's medical specialty?
Dr. John Ong practices Nephrology Physician in Fountain Valley, CA.
Where does Dr. John Ong practice?
Dr. John Ong practices at 11100 Warner Ave Ste 218, Fountain Valley, CA 927087511. Office phone: 7146419696.
What is Dr. John Ong's NPI?
Dr. John Ong's National Provider Identifier (NPI) is 1477056406, issued by NPPES.
Does Dr. John Ong accept Medicare assignment?
Yes. Dr. John Ong accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.