Doctor profile · Federal record
Dr. Woo Sung Ahn, MD
Internal Medicine Physician (CMS: Internal Medicine) · Lakewood, CA
- NPI 1396807806
- Accepts Medicare
- 50 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
20145 S Pioneer Blvd
Lakewood, CA 907151051
(562) 916-5020
fax (562) 916-5022
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1976 — 50 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A51408
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396807806. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
679
Distinct HCPCS
7
Medicare allowed
$51,951
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 432 | 102 | $100 | |
36415 |
Insertion of needle into vein for collection of blood sample | 157 | 90 | $8 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 32 | 32 | $144 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 19 | 15 | $100 | |
90686 |
Influenza vaccine, quadrivalent, preservative free, 0.5 ml dosage | 13 | 13 | $22 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 13 | 11 | $16 | |
G0008 |
Administration of influenza virus vaccine | 13 | 13 | $30 |
In context: peer comparison
Among 7 peers in Lakewood Internal Medicine Physician, average services per provider: 89. This provider delivers 7.6× the peer median.Open Payments
Industry payments received
All-time total
$793
Transactions
39
Manufacturers
10
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novo Nordisk INC | 12 | $175.23 | |
| Amgen INC. | 4 | $90.95 | |
| Sumitomo Pharma America, INC. | 3 | $88.10 | |
| Abbvie INC. | 4 | $87.28 | |
| Aimmune Therapeutics, INC. | 4 | $83.77 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 3 | $79.61 | |
| Radius Health, INC. | 3 | $74.17 | |
| Bayer Healthcare Pharmaceuticals INC. | 3 | $56.01 | |
| AstraZeneca Pharmaceuticals Lp | 2 | $36.37 | |
| GlaxoSmithKline, LLC. | 1 | $21.88 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
8,188
Patients
1,980
Total drug cost
$1,405,089
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 1,142 | 300 | $18,932 |
| Rosuvastatin Calcium | Generic | 996 | 279 | $32,912 |
| Losartan-Hydrochlorothiazide (Losartan/Hydrochlorothiazide) | Brand | 736 | 180 | $14,888 |
| Amlodipine Besylate | Generic | 703 | 166 | $7,608 |
| Losartan Potassium | Generic | 593 | 150 | $8,859 |
| Clopidogrel (Clopidogrel Bisulfate) | Brand | 528 | 134 | $8,171 |
| Vascepa (Icosapent Ethyl) | Brand | 518 | 111 | $340,143 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 507 | 120 | $7,879 |
| Glipizide ER (Glipizide) | Brand | 461 | 105 | $12,456 |
| Icosapent Ethyl | Generic | 398 | 87 | $222,748 |
Frequently asked questions
What is Dr. Woo Sung Ahn's medical specialty?
Dr. Woo Sung Ahn practices Internal Medicine Physician in Lakewood, CA.
Where does Dr. Woo Sung Ahn practice?
Dr. Woo Sung Ahn practices at 20145 S Pioneer Blvd, Lakewood, CA 907151051. Office phone: 5629165020.
What is Dr. Woo Sung Ahn's NPI?
Dr. Woo Sung Ahn's National Provider Identifier (NPI) is 1396807806, issued by NPPES.
Does Dr. Woo Sung Ahn accept Medicare assignment?
Yes. Dr. Woo Sung Ahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Woo Sung Ahn commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.