KLAUS D MERGENER (M.D.) – Gastroenterology Physician, NPI 1578537031
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
474 GASTROENTEROLOGY in WA
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Provider Addresses for KLAUS D MERGENER (M.D.)
Wenatchee Valley Medical Center, 820, North Chelan Avenue, Wenatchee, Chelan County, Washington, 98801, United States
WENATCHEE, WA 988012028
Phone: (509) 663-8711
Type: Mailing
Moses Lake, Grant County, Washington, 98837, United States
MOSES LAKE, WA 988372238
Phone: (509) 663-8711
Type: Location
1917 WARREN AVE N
SEATTLE, WA 981092551
Phone: (206) 852-3034
Type: Mailing
21600 HIGHWAY 99 STE 260
EDMONDS, WA 980268049
Phone: (425) 774-2650
Fax: (425) 774-2643
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $206.
Total Amount is formed as General ($206) + Research ($0) + Ownership ($0) = $206.
Last reported payment date: 2024-10-08 • Largest payer in this snapshot: Cook Medical LLC ($184).
Total Amount
$206
General + Research + Ownership
Payments
5
Total payment records
General Amount
$206
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Cook Medical LLC | $184 |
| PENTAX of America, Inc. | $22 |
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: 2021-07-29
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20040422000066 | I | Gastroenterology | WA | TBD |
| I20210729003775 | I | Gastroenterology | SD | 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 |
|---|---|---|---|---|
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 96 | 93 | $0 |
| 43235 | Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 37 | 36 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 37 | 37 | $0 |
| 74328 | Review by radiologist of image from tube placement into bile duct using an endoscope | 32 | 29 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 31 | 24 | $0 |
Insurance plans in this area (ZIP 98801)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | IA | |
| - | SD | |
| Internal Medicine, Hospitalist | SD | |
| - | MN | |
| Physical Therapist In Private Practice | SD | |
| - | SD | |
| Diagnostic Radiology | OK | |
| Nurse Practitioner | SD | |
| Nurse Practitioner | SD | |
| Hospice/Palliative Care | SD |
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