MR. KARL KEN FUKUNAGA (MD) – Gastroenterology Physician, NPI 1487644613
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,990 GASTROENTEROLOGY in CA
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Provider Addresses for MR. KARL KEN FUKUNAGA (MD)
23451, Madison Street, Walteria, Torrance, Los Angeles County, California, 90505, United States
SUITE 290
TORRANCE, CA 905054763
Phone: (310) 375-1246
Fax: (310) 375-0590
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 70 Open Payments records for all available years, with a total value of $1,425.
Total Amount is formed as General ($1,425) + Research ($0) + Ownership ($0) = $1,425.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: ABBVIE INC. ($465).
Total Amount
$1,425
General + Research + Ownership
Payments
70
Total payment records
General Amount
$1,425
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $465 |
| PFIZER INC. | $413 |
| Gilead Sciences, Inc. | $186 |
| Ardelyx, Inc. | $59 |
| Boston Scientific Corporation | $50 |
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: 2004-05-03
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20040503000928 | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 242 | 107 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 207 | 132 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 95 | 36 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 93 | 93 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 80 | 79 | $0 |
Insurance plans in this area (ZIP 90505)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| Gastroenterology, Internal Medicine | CA | |
| Gastroenterology, Internal Medicine | CA | |
| Nurse Practitioner | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| Nurse Practitioner | CA |
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