Doctor profile · Federal record
Dr. Gemma Ko, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Pico Rivera, CA
- NPI 1437167715
- Accepts Medicare
- 36 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4511 Rosemead Blvd
Pico Rivera, CA 906602032
(562) 692-3388 - Mailing address
-
Po Box 1699
Whittier, CA 906091699
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G70866
- Medicaid
- CA #00G708660
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1437167715. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
457
Distinct HCPCS
6
Medicare allowed
$41,146
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 255 | 53 | $134 | |
36415 |
Insertion of needle into vein for collection of blood sample | 84 | 40 | $7 | |
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 47 | 30 | $26 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 28 | 28 | $140 | |
90756 |
Influenza vaccine, quadrivalent derived from cell cultures | 22 | 22 | $32 | |
G0008 |
Administration of influenza virus vaccine | 21 | 21 | $25 |
In context: peer comparison
Among 2 peers in Pico Rivera Internal Medicine Physician, average services per provider: 113. This provider delivers 4.0× the peer median.Open Payments
Industry payments received
All-time total
$112
Transactions
5
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novo Nordisk INC | 2 | $50.62 | |
| Otsuka America Pharmaceutical, INC. | 1 | $25.39 | |
| AstraZeneca Pharmaceuticals Lp | 1 | $19.00 | |
| Lilly USA, LLC | 1 | $16.80 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,402
Patients
340
Total drug cost
$25,295
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 234 | 59 | $4,049 |
| Losartan Potassium | Generic | 126 | 30 | $2,809 |
| Gabapentin | Generic | 111 | 23 | $3,377 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 110 | 20 | $2,905 |
| Metformin Hcl | Generic | 86 | 24 | $847 |
| Furosemide | Generic | 82 | 15 | $492 |
| Levothyroxine Sodium | Generic | 82 | 19 | $2,040 |
| Lorazepam | Generic | 81 | 15 | $830 |
| Amlodipine Besylate | Generic | 78 | 21 | $836 |
| Famotidine | Generic | 78 | 24 | $1,414 |
Frequently asked questions
What is Dr. Gemma Ko's medical specialty?
Dr. Gemma Ko practices Internal Medicine Physician in Pico Rivera, CA.
Where does Dr. Gemma Ko practice?
Dr. Gemma Ko practices at 4511 Rosemead Blvd, Pico Rivera, CA 906602032. Office phone: 5626923388.
What is Dr. Gemma Ko's NPI?
Dr. Gemma Ko's National Provider Identifier (NPI) is 1437167715, issued by NPPES.
Does Dr. Gemma Ko accept Medicare assignment?
Yes. Dr. Gemma Ko accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gemma Ko commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (HCPCS 99211). Source: CMS Medicare Physician & Other Practitioners file.