Doctor profile · Federal record
Dr. Karen Don, MD
Internal Medicine Physician (CMS: Internal Medicine) · Fountain Valley, CA
- NPI 1184655698
- Accepts Medicare
- 34 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
9900 Talbert Ave, Suite 302
Fountain Valley, CA 927085153
(714) 965-2500
fax (714) 965-2581 - Additional location
-
18682 Beach Blvd Ste 150
Huntington Beach, CA 926482050
fax (714) 965-2593 - Additional location
-
20981 Magnolia St
Huntington Beach, CA 926466338
fax (714) 965-2593 - Mailing address
-
Po Box 8039
Fountain Valley, CA 927288039
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- February 21, 2026
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G78774
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1184655698. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$42
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 1 | $26.35 | |
| Abbott Laboratories | 1 | $15.46 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
969
Patients
409
Total drug cost
$15,057
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 167 | 77 | $2,682 |
| Levothyroxine Sodium | Generic | 139 | 58 | $3,499 |
| Losartan Potassium | Generic | 81 | 36 | $1,096 |
| Amlodipine Besylate | Generic | 79 | 30 | $687 |
| Lisinopril | Generic | 72 | 28 | $583 |
| Simvastatin | Generic | 49 | 21 | $632 |
| Montelukast Sodium | Generic | 48 | 19 | $698 |
| Famotidine | Generic | 47 | 15 | $681 |
| Metformin Hcl | Generic | 45 | 25 | $729 |
| Metoprolol Succinate | Generic | 45 | 17 | $962 |
Hospital affiliations
Frequently asked questions
What is Dr. Karen Don's medical specialty?
Dr. Karen Don practices Internal Medicine Physician in Fountain Valley, CA.
Where does Dr. Karen Don practice?
Dr. Karen Don practices at 9900 Talbert Ave, Fountain Valley, CA 927085153. Office phone: 7149652500.
What is Dr. Karen Don's NPI?
Dr. Karen Don's National Provider Identifier (NPI) is 1184655698, issued by NPPES.
Does Dr. Karen Don accept Medicare assignment?
Yes. Dr. Karen Don accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.