Klaus Mergener, M.D.
NPI 1578537031 · Gastroenterology Physician · Edmonds, WA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Klaus Mergener, M.D. is a Gastroenterology Physician provider in Edmonds, WA (NPI 1578537031).
Provider details
- NPI number
- 1578537031
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00039380 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
361 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 86 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 56 | $162 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 44 | $91 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 39 | $74 |
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 29 | $22 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$151 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-13
- Last updated
- 2024-10-25
- Certified
- 2024-10-25
Frequently asked questions
- What is Klaus Mergener's NPI number?
- Klaus Mergener's National Provider Identifier (NPI) is 1578537031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Klaus Mergener's specialty?
- Klaus Mergener is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Klaus Mergener located?
- Klaus Mergener's practice location on file with NPPES is 21600 Highway 99 Ste 260, Edmonds, WA 98026-8049.
- What is Klaus Mergener's phone number?
- The practice phone number listed in the NPPES registry for Klaus Mergener is (425) 774-2650.
- Does Klaus Mergener accept Medicare?
- Klaus Mergener is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Klaus Mergener's NPI active?
- Yes — Klaus Mergener's NPI (1578537031) is active in the NPPES registry as of the last update on 2024-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.