DR. ANDREW C KO (M.D.) – Gastroenterology Physician, NPI 1437170990
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,981 GASTROENTEROLOGY in CA
Provider Addresses for DR. ANDREW C KO (M.D.)
17822 BEACH BLVD STE 301
HUNTINGTON BEACH, CA 926477197
Phone: (714) 545-7311
Type: Mailing
28081 MARGUERITE PKWY UNIT 2028
MISSION VIEJO, CA 926900028
Phone: (949) 342-6111
Type: Mailing
16671 EAST YORBA LINDA BLVD STE 210
YORBA LINDA, CA 92886
Phone: (714) 996-3700
Fax: (714) 985-6480
Type: Location
Medical Offices, 11100, Warner Avenue, Fountain Valley, Orange County, California, 92708, United States
SUITE 216
FOUNTAIN VALLEY, CA 927087506
Phone: (714) 545-7311
Fax: (714) 545-1398
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $437.
Total Amount is formed as General ($437) + Research ($0) + Ownership ($0) = $437.
Last reported payment date: 2024-02-21 • Largest payer in this snapshot: Janssen Biotech, Inc. ($122).
Total Amount
$437
General + Research + Ownership
Payments
4
Total payment records
General Amount
$437
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-02-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $122 |
| Intercept Pharmaceuticals, Inc. | $119 |
| E.R. Squibb & Sons, L.L.C. | $115 |
| Endogastric Solutions, Inc | $82 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-10-05
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20041005001263 | I | Gastroenterology | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 157 | 81 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 112 | 68 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 43 | 40 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 17 | 17 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 15 | 15 | $0 |
Insurance plans in this area (ZIP 92647)
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