Doctor profile · Federal record
Dr. Andrew Ko, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Yorba Linda, CA
- NPI 1437170990
- Accepts Medicare
- 40 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
16671 East Yorba Linda Blvd Ste 210
Yorba Linda, CA 92886
(714) 996-3700
fax (714) 985-6480 - Mailing address
-
28081 Marguerite Pkwy Unit 2028
Mission Viejo, CA 926900028
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 30, 2025
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #G61260
- Medicaid
- CA #00G612601
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1437170990. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
370
Distinct HCPCS
7
Medicare allowed
$49,278
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 157 | 81 | $98 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 112 | 68 | $139 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 43 | 40 | $145 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 17 | 17 | $237 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 15 | 15 | $265 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 13 | 13 | $136 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 13 | 13 | $180 |
In context: peer comparison
Among 5 peers in Yorba Linda Gastroenterology Physician, average services per provider: 46. This provider delivers 8.0× the peer median.Open Payments
Industry payments received
All-time total
$119
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Intercept Pharmaceuticals, INC. | 1 | $118.88 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
177
Patients
61
Total drug cost
$5,147
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Famotidine | Generic | 68 | 23 | $1,574 |
| Pantoprazole Sodium | Generic | 37 | 14 | $988 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 25 | 24 | $2,023 |
| Omeprazole | Generic | 24 | 0 | $228 |
| Lansoprazole | Generic | 12 | 0 | $243 |
| Nortriptyline Hcl | Generic | 11 | 0 | $91 |
Hospital affiliations
Frequently asked questions
What is Dr. Andrew Ko's medical specialty?
Dr. Andrew Ko practices Gastroenterology Physician in Yorba Linda, CA.
Where does Dr. Andrew Ko practice?
Dr. Andrew Ko practices at 16671 East Yorba Linda Blvd Ste 210, Yorba Linda, CA 92886. Office phone: 7149963700.
What is Dr. Andrew Ko's NPI?
Dr. Andrew Ko's National Provider Identifier (NPI) is 1437170990, issued by NPPES.
Does Dr. Andrew Ko accept Medicare assignment?
Yes. Dr. Andrew Ko accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Andrew Ko commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.