Doctor profile · Federal record
Dr. Allen Hassen, M.D.
Family Medicine Physician (CMS: Family Practice) · Occupational Medicine Physician · General Practice Physician · Preventive Medicine/Occupational Environmental Medicine Physician · West Covina, CA
- NPI 1659604023
- Accepts Medicare
- 16 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3121 E Hillside Dr
West Covina, CA 917913459
(626) 347-8220
Credentials & registration
- NPI registered
- September 2009 — 17 yrs on file
- Profile last updated
- July 13, 2011
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- California #A114943
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1659604023. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$425
Transactions
16
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novo Nordisk Inc | 2 | $106.45 | |
| Bayer Healthcare Pharmaceuticals Inc. | 3 | $77.97 | |
| Astellas Pharma US Inc | 2 | $53.97 | |
| Merck Sharp & Dohme LLC | 2 | $41.91 | |
| Lilly USA, LLC | 1 | $31.86 | |
| SANOFI PASTEUR INC. | 1 | $21.82 | |
| Phadia US Inc. | 1 | $21.63 | |
| RedHill Biopharma Inc. | 1 | $20.05 | |
| Cranial Technologies, Inc | 1 | $19.71 | |
| ViiV Healthcare Company | 1 | $16.51 | |
| Exact Sciences Corporation | 1 | $13.16 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,376
Patients
578
Total drug cost
$36,883
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 217 | 94 | $3,168 |
| Metformin Hcl | Generic | 170 | 62 | $1,692 |
| Lisinopril | Generic | 134 | 55 | $1,208 |
| Amlodipine Besylate | Generic | 99 | 44 | $1,137 |
| Losartan Potassium | Generic | 94 | 34 | $1,503 |
| Ibuprofen | Generic | 93 | 55 | $1,077 |
| Omeprazole | Generic | 87 | 35 | $739 |
| Hydrochlorothiazide | Generic | 74 | 28 | $288 |
| Levothyroxine Sodium | Generic | 72 | 25 | $1,203 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 68 | 20 | $2,431 |
Frequently asked questions
What is Dr. Allen Hassen's medical specialty?
Dr. Allen Hassen practices Family Medicine Physician in West Covina, CA.
Where does Dr. Allen Hassen practice?
Dr. Allen Hassen practices at 3121 E Hillside Dr, West Covina, CA 917913459. Office phone: 6263478220.
What is Dr. Allen Hassen's NPI?
Dr. Allen Hassen's National Provider Identifier (NPI) is 1659604023, issued by NPPES.
Does Dr. Allen Hassen accept Medicare assignment?
Yes. Dr. Allen Hassen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.