Dr. Dariusz G. Walczak, MD
- Medicare services, 2024
- 127
- Medicare patients, 2024
- 144
- Hospital affiliations
- 1
- Industry payments
- $100
- Medical groups
- 3
- Practice address
- 400 S 43rd St, Renton, WA 98055
- Practice phone
- Call (425) 228-3450
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Walczak's professional email, personal email and mobile number
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Dr. Dariusz G. Walczak is an anesthesiologist in Renton, Washington
Dr. Walczak practices at Valley Medical Center in Renton, Washington, part of University of Washington.
Dr. Walczak's NPI, 1861424236, was assigned on July 7, 2006. Dr. Walczak holds Washington license MD00035997.
- NPI
- 1861424236NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779541065
- NPI enumeration date
- July 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (425) 228-3450
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dariusz G. Walczak practices at Valley Medical Center in Renton, Washington
Dr. Walczak's primary practice is Valley Medical Center, at 400 S 43rd St, Renton, WA 98055 in King County. The practice phone is (425) 228-3450.
- Valley Medical Center400 S 43rd St, Renton, WA 98055 · King CountyPhone(425) 228-3450
Source: Dmand AI Affiliation Data
Dr. Dariusz G. Walczak is affiliated with 1 site of care and 3 medical groups
Dr. Walczak's primary practice is Valley Medical Center in Renton, Washington, part of University of Washington. The medical group on file is Valley Anesthesia Associates. Dmand AI also links Dr. Walczak to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Dariusz G. Walczak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walczak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Valley Medical Center | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dariusz G. Walczak is one of 1,332 anesthesiologists in Washington
Anesthesiology is Dr. Walczak's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Walczak is licensed in Washington.
Specialties and state licenses
- Anesthesiology, WashingtonPrimary
Anesthesiologists near Dr. Walczak
Counts of anesthesiologists 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. Dariusz G. Walczak billed Medicare for 127 services in 2024
CMS data shows 127 Medicare services from Dr. Walczak across 4 procedure codes in 2024, for 144 Medicare patients. Medicare paid $13,496 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Walczak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1022024: 12725%
Dr. Walczak compared with the Washington median for anesthesiologists, 2024
- Dr. Walczak
- Washington median
- Medicare services
- 127vs 413.1 times
- Medicare patients
- 144vs 10735% above
Medians across 1,312 anesthesiologists in Washington with Dmand AI profiles that report each measure.
Dr. Walczak'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. Walczak and other anesthesiologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dariusz G. Walczak treated 144 Medicare patients in 2024, average age 73
CMS counts 144 Medicare patients who saw Dr. Walczak in 2024. The largest group is 65 to 74, with 85 patients. 72% of them have high cholesterol, and 62% have high blood pressure. 11% are also on Medicaid. Their average risk score is 0.82, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Walczak's median patient age at 57, with 54% women.
Dr. Walczak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Walczak's Medicare patients by sex, 2024
- Women8056%
- Men6444%
Chronic conditions among Dr. Walczak's Medicare patients, 2024
- High cholesterol72%
- High blood pressure62%
- Arthritis43%
- Diabetes26%
- Cancer15%
- Anxiety14%
- Mood disorders14%
- Chronic kidney disease13%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walczak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Dariusz G. Walczak takes part in Medicare
Dr. Walczak accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Dariusz G. Walczak received $100 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Walczak from 1 drug or device company in 2019. Consulting fees make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $100.
Companies that paid Dr. Walczak the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Dariusz G. Walczak'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Dariusz G. Walczak
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. Dariusz G. Walczak's NPI number?
Dr. Dariusz G. Walczak's NPI number is 1861424236. It was assigned on July 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Dariusz G. Walczak?
Dr. Dariusz G. Walczak is an anesthesiologist in Renton, Washington. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Dariusz G. Walczak practice?
Dr. Walczak practices at 400 S 43rd St, Renton, WA 98055. Dr. Walczak's primary practice is Valley Medical Center in Renton, Washington, part of University of Washington. Dmand AI also links Dr. Walczak to 2 medical groups.
What is Dr. Dariusz G. Walczak's office phone number?
The practice phone on file for Dr. Walczak is (425) 228-3450.
What is Dr. Dariusz G. Walczak's medical license number?
Dr. Walczak holds Washington license MD00035997.
Which hospitals is Dr. Dariusz G. Walczak affiliated with?
Dr. Walczak practices at Valley Medical Center in Renton, Washington.
What medical group is Dr. Dariusz G. Walczak part of?
Dr. Walczak is linked to Valley Anesthesia Associates. Dmand AI links Dr. Walczak to 2 more medical groups.
Does Dr. Dariusz G. Walczak accept Medicare?
Yes. CMS data shows Dr. Walczak billed Medicare for 127 services in 2024, and Dr. Walczak accepts Medicare assignment.
How many Medicare patients does Dr. Dariusz G. Walczak see?
CMS counts 144 Medicare patients who saw Dr. Walczak in 2024, with an average age of 73.
What services does Dr. Dariusz G. Walczak bill to Medicare?
In 2024, Dr. Walczak's most billed Medicare services were anesthesia (00811), anesthesia (00813) and anesthesia (00812).
Has Dr. Dariusz G. Walczak received payments from drug or device companies?
CMS Open Payments shows $100 in general payments to Dr. Walczak from 1 company from 2019 to 2019. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Dariusz G. Walczak been practicing?
Dr. Walczak graduated from medical school in 1987, 39 years ago.
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