Dr. Klaus D. Mergener, MD
- Medicare services, 2024
- 361
- Medicare patients, 2024
- 165
- Part D claims, 2020
- 118
- Hospital affiliations
- 2
- Industry payments
- $188,572
- Practice address
- 21600 Hwy 99 Ste 260, Edmonds, WA 98026
- Practice phone
- Call (425) 774-2650
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Edmonds Endoscopy Center
Surgery Center - Medicare-Certified · Edmonds, Washington
Find Dr. Mergener's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Klaus D. Mergener is a gastroenterologist in Edmonds, Washington
Dr. Mergener practices at Edmonds Endoscopy Center in Edmonds, Washington.
Dr. Mergener's NPI, 1578537031, was assigned on February 13, 2006. Dr. Mergener holds Washington license MD00039380.
- NPI
- 1578537031NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709771983
- NPI enumeration date
- February 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (425) 774-2650
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Klaus D. Mergener practices at Edmonds Endoscopy Center in Edmonds, Washington
Dr. Mergener's primary practice is Edmonds Endoscopy Center, at 21600 Hwy 99 Ste 260, Edmonds, WA 98026. The practice phone is (425) 774-2650.
- Edmonds Endoscopy Center21600 Hwy 99 Ste 260, Edmonds, WA 98026Phone(425) 774-2650
Source: Dmand AI Affiliation Data
Dr. Klaus D. Mergener is affiliated with 3 sites of care and 2 medical groups
Dr. Mergener's primary practice is Edmonds Endoscopy Center in Edmonds, Washington. Dr. Mergener is also affiliated with Avera McKennan Hospital & University Health Center. The medical group on file is Puget Sound Gastroenterology. Dmand AI also links Dr. Mergener to 1 more hospital and 1 medical group, each named with a free account. Dr. Mergener's employer is on file too: a surgery center (asc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Klaus D. Mergener's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mergener practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Edmonds Endoscopy Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Klaus D. Mergener is one of 434 gastroenterologists in Washington
Gastroenterology is Dr. Mergener's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Mergener is licensed in Washington.
Specialties and state licenses
- Gastroenterology, WashingtonPrimary
Gastroenterologists near Dr. Mergener
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Klaus D. Mergener billed Medicare for 361 services in 2024
CMS data shows 361 Medicare services from Dr. Mergener across 11 procedure codes in 2024, for 165 Medicare patients. Medicare paid $36,575 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mergener's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1642024: 18110%
- Surgery
- 2023: 1132024: 15134%
- Imaging
- 2023: 322024: 299%
Dr. Mergener compared with the Washington median for gastroenterologists, 2024
- Dr. Mergener
- Washington median
- Medicare services
- 361vs 356Close to median
- Medicare patients
- 165vs 24432% below
- Part D claims
- 118vs 27257% below
Medians across 433 gastroenterologists in Washington with Dmand AI profiles that report each measure.
Dr. Mergener's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mergener and other gastroenterologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Klaus D. Mergener treated 165 Medicare patients in 2024, average age 76
CMS counts 165 Medicare patients who saw Dr. Mergener in 2024. The largest group is 65 to 74, with 57 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.02, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Mergener's median patient age at 61, with 53% women.
Dr. Mergener's Medicare patients by age, 2024
Dr. Mergener's Medicare patients by sex, 2024
- Women8652%
- Men7948%
Chronic conditions among Dr. Mergener's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Diabetes44%
- Ischemic heart disease42%
- Chronic kidney disease41%
- Mood disorders41%
- Depression40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mergener's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Klaus D. Mergener wrote 118 Medicare Part D claims in 2020
In 2020, Dr. Mergener wrote 118 Medicare Part D claims. They cover 4 drugs, with $2,565 in total drug cost. In 2016, CMS named 23 claims across 1 drug.
Dr. Mergener's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2020
- 2016
- 2020
- Claims for drugs CMS names
- 2016: 232020: 118413%
Drugs named by CMS: 4 in 2020, 1 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Klaus D. Mergener ranks in the 88th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Mergener accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 174 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Mergener, more than 88% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Mergener ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 88th percentile174 procedures
- Colonoscopy
- 77th percentile90 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Klaus D. Mergener received $188,572 in industry payments from 2016 to 2025
CMS Open Payments shows 102 general payments to Dr. Mergener from 12 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 83% of the total. Pentax of America, Inc. paid the most, $153,311.
General payments to Dr. Mergener by program year, 2016 to 2025
General payments to Dr. Mergener by kind, 2016 to 2025
- Consulting fees$156,40983%
- Travel and lodging$24,58913%
- Speaker and faculty fees$5,0003%
- Food and beverage$2,0241%
- Other$5500%
Companies that paid Dr. Mergener the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Klaus D. Mergener's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Klaus D. Mergener
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Klaus D. Mergener's NPI number?
Dr. Klaus D. Mergener's NPI number is 1578537031. It was assigned on February 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Klaus D. Mergener?
Dr. Klaus D. Mergener is a gastroenterologist in Edmonds, Washington. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Klaus D. Mergener practice?
Dr. Mergener practices at 21600 Hwy 99 Ste 260, Edmonds, WA 98026. Dr. Mergener's primary practice is Edmonds Endoscopy Center in Edmonds, Washington. Dmand AI also links Dr. Mergener to 1 hospital and 1 medical group.
What is Dr. Klaus D. Mergener's office phone number?
The practice phone on file for Dr. Mergener is (425) 774-2650.
What is Dr. Klaus D. Mergener's medical license number?
Dr. Mergener holds Washington license MD00039380.
Which hospitals is Dr. Klaus D. Mergener affiliated with?
Dr. Mergener is affiliated with Avera McKennan Hospital & University Health Center. Dmand AI links Dr. Mergener to 1 more hospital.
What medical group is Dr. Klaus D. Mergener part of?
Dr. Mergener is linked to Puget Sound Gastroenterology. Dmand AI links Dr. Mergener to 1 more medical group.
Does Dr. Klaus D. Mergener accept Medicare?
Yes. CMS data shows Dr. Mergener billed Medicare for 361 services in 2024, and Dr. Mergener accepts Medicare assignment.
How many Medicare patients does Dr. Klaus D. Mergener see?
CMS counts 165 Medicare patients who saw Dr. Mergener in 2024, with an average age of 76.
What services does Dr. Klaus D. Mergener bill to Medicare?
In 2024, Dr. Mergener's most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99223) and surgery: digestive system (43235).
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What drugs does Dr. Klaus D. Mergener prescribe most?
In 2020 Medicare Part D data, Dr. Mergener's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Peg 3350-Electrolyte.
Has Dr. Klaus D. Mergener received payments from drug or device companies?
CMS Open Payments shows $188,572 in general payments to Dr. Mergener from 12 companies from 2016 to 2025. The largest total came from Pentax of America, Inc.
How long has Dr. Klaus D. Mergener been practicing?
Dr. Mergener graduated from medical school in 1989, 37 years ago.
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