DR. MASON JOSEPH KLAAS DC
NPI 1609790468
Chiropractor in Bartlett, IL
About Dr. Mason Joseph Klaas Dc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MASON JOSEPH KLAAS DC (NPI 1609790468) is an individual chiropractor in Bartlett, Illinois, licensed in Illinois (038.024504) and active in the NPI registry since August 2026. He is a graduate of Palmer College Chiropractic - Davenport (2026).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mason Joseph Klaas Dc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mason Klaas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bartlett, IL 60103
- Reassigned Medicare billing, Illinois enrollment
- 16 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.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BARTLETT, IL 60103
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 Mason Klaas's NPI number?
The NPI number for Mason Klaas is 1609790468. It was assigned to this individual provider in the NPPES registry on August 5, 2026.
Where is Mason Klaas located?
Mason Klaas practices at 260 E Army Trail Rd Ste D, Bartlett, IL 60103. The listed phone number is (630) 830-8600.
What is Mason Klaas's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Mason Klaas enrolled in Medicare?
Yes. Mason Klaas is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mason Klaas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mason Klaas reassigns Medicare benefits to Carol Stream Service Corporation (Bartlett, IL). The 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 Mason Klaas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mason Klaas was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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. Mason Joseph Klaas, DC · NPI 1609790468
Chiropractor provider in Bartlett, Illinois. Individual provider, active in the CMS NPPES registry since August 5, 2026.
## Identity
- **NPI:** 1609790468 (Entity type: Individual)
- **Enumerated:** August 5, 2026
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 038.024504 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 260 E ARMY TRAIL RD STE D, Bartlett, IL 60103-3005
- **Phone:** (630) 830-8600
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** Carol Stream Service Corporation (NPI 1679641823, Bartlett, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Palmer College Chiropractic - Davenport, class of 2026
## Record status
- **NPPES last updated:** August 5, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1609790468) · Data from the CMS NPPES public registry.