SIEW M WONG (M.D.) – Gastroenterology Physician, NPI 1336387356
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
474 GASTROENTEROLOGY in WA
Provider Addresses for SIEW M WONG (M.D.)
8819 W VICTORIA AVE STE 130
KENNEWICK, WA 993367193
Phone: (509) 460-5500
Fax: (509) 460-5111
Type: Location
3900, South Zintel Way, Tri-Cities, Benton County, Washington, 99337, United States
KENNEWICK, WA 99338
Phone: (509) 942-3627
Fax: (509) 942-2268
Type: Mailing
55, West Tietan Street, Walla Walla, Walla Walla County, Washington, 99362, United States
WALLA WALLA, WA 993624445
Phone: (509) 525-3720
Fax: (509) 522-1592
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $250.
Total Amount is formed as General ($250) + Research ($0) + Ownership ($0) = $250.
Last reported payment date: 2024-03-26 • Largest payer in this snapshot: Janssen Biotech, Inc. ($125).
Total Amount
$250
General + Research + Ownership
Payments
2
Total payment records
General Amount
$250
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-03-26
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $125 |
| Phathom Pharmaceuticals, Inc. | $125 |
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: 2011-09-13
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 |
|---|---|---|---|---|
| I20110913000143 | I | Gastroenterology | WA | 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 | 423 | 220 | $0 |
| G0500 | Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 161 | 154 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 160 | 140 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 149 | 147 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 147 | 147 | $0 |
Insurance plans in this area (ZIP 99336)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | AR | |
| Gastroenterology, Internal Medicine | WA | |
| Gastroenterology, Internal Medicine | WA | |
| Nurse Practitioner | WA |
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