Doctor profile · Federal record
Dr. William Frem, DO
Internal Medicine Physician (CMS: Internal Medicine) · Los Angeles, CA
- NPI 1831820646
- Accepts Medicare
- 4 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1720 E Cesar E Chavez Ave
Los Angeles, CA 900332414
(323) 268-5000
Credentials & registration
- NPI registered
- June 2022 — 4 yrs on file
- Profile last updated
- September 3, 2025
- Year of graduation
- 2022 — 4 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #20A22067
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1831820646. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$19
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 1 | $19.16 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
28
Patients
0
Total drug cost
$303
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 16 | 0 | $214 |
| Lisinopril | Generic | 12 | 0 | $89 |
Frequently asked questions
What is Dr. William Frem's medical specialty?
Dr. William Frem practices Internal Medicine Physician in Los Angeles, CA.
Where does Dr. William Frem practice?
Dr. William Frem practices at 1720 E Cesar E Chavez Ave, Los Angeles, CA 900332414. Office phone: 3232685000.
What is Dr. William Frem's NPI?
Dr. William Frem's National Provider Identifier (NPI) is 1831820646, issued by NPPES.
Does Dr. William Frem accept Medicare assignment?
Yes. Dr. William Frem accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.