DR. ADAM MARK KLASSEN D.C.
NPI 1356669576
Chiropractor in Sedro Woolley, WA
About Dr. Adam Mark Klassen D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ADAM MARK KLASSEN D.C. (NPI 1356669576) is an individual chiropractor in Sedro Woolley, Washington, licensed in Washington (CH60145297) and active in the NPI registry since May 2010. He is affiliated with Whidbeyhealth Medical Center and is a graduate of Palmer College Chiropractic - West Sunnyvale (2010).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Adam Mark Klassen D.c. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Adam Klassen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sedro Woolley, WA 98284
- Reassigned Medicare billing, Washington enrollment
- 4 clinicians in this Medicare group
Mount Vernon, WA 98273
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Hansen Chiropractic P S
- 19 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Whidbeyhealth Medical Center
Critical Access Hospitals · Coupeville, WAOther Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Adam Klassen's NPI number?
The NPI number for Adam Klassen is 1356669576. It was assigned to this individual provider in the NPPES registry on May 12, 2010. The provider is also known as Dr. Adam Mark Klassen D.C..
Where is Adam Klassen located?
Adam Klassen practices at 700 Murdock St Suite B, Sedro Woolley, WA 98284. The listed phone number is (360) 855-1021.
What is Adam Klassen's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Adam Klassen enrolled in Medicare?
Yes. Adam Klassen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Adam Klassen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Adam Klassen reassigns Medicare benefits to 2 organizations: Health First Chiropractic Inc Ps (Sedro Woolley, WA) and Hansen Chiropractic (Mount Vernon, WA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Adam Klassen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Adam Klassen affiliated with any hospitals?
According to CMS data, Adam Klassen is affiliated with Whidbeyhealth Medical Center.
When was this NPI record last updated?
The NPPES record for Adam Klassen was last updated on September 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Adam Mark Klassen, D.C. · NPI 1356669576
Chiropractor provider in Sedro Woolley, Washington. Individual provider, active in the CMS NPPES registry since May 12, 2010.
## Identity
- **NPI:** 1356669576 (Entity type: Individual)
- **Enumerated:** May 12, 2010
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** CH60145297 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 700 MURDOCK ST, SUITE B, Sedro Woolley, WA 98284-1426
- **Phone:** (360) 855-1021 · **Fax:** (360) 855-0356
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Health First Chiropractic Inc Ps (NPI 1588673768, Sedro Woolley, WA); Hansen Chiropractic (NPI 1144589920, Mount Vernon, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Palmer College Chiropractic - West Sunnyvale, class of 2010
## Record status
- **NPPES last updated:** September 11, 2012
- **Other identifiers:** Medicare PIN G8892097 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1356669576) · Data from the CMS NPPES public registry.