DR. KATHERINE LYNN WALKER M.D.
NPI 1184622888
Family Medicine in Niwot, CO
About Dr. Katherine Lynn Walker M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHERINE LYNN WALKER M.D. (NPI 1184622888) is an individual family medicine provider in Niwot, Colorado, licensed in Colorado (40593) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS and is a graduate of University Of Louisville School Of Medicine (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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. Katherine Lynn Walker M.d. 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 Katherine Walker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boulder, CO 80301
- Reassigned Medicare billing, Colorado enrollment
- 283 clinicians in this Medicare group
Longmont, CO 80501
- Reassigned Medicare billing, Colorado enrollment
- 1,193 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80503 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Katherine Walker's NPI number?
The NPI number for Katherine Walker is 1184622888. It was assigned to this individual provider in the NPPES registry on July 7, 2005.
Where is Katherine Walker located?
Katherine Walker practices at 6800 79th St Suite 102, Niwot, CO 80503. The listed phone number is (720) 494-7100.
What is Katherine Walker's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Katherine Walker enrolled in Medicare?
Yes. Katherine Walker 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 Katherine Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Walker reassigns Medicare benefits to 2 organizations: Boulder Community Health (Boulder, CO) and Catholic Health Initiatives Colorado (Longmont, CO). 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 Katherine Walker'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 Katherine Walker was last updated on July 22, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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. Katherine Lynn Walker, M.D. · NPI 1184622888
Family Medicine physician in Niwot, Colorado. Individual provider, active in the CMS NPPES registry since July 7, 2005.
## Identity
- **NPI:** 1184622888 (Entity type: Individual)
- **Enumerated:** July 7, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 40593 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 6800 79TH ST, SUITE 102, Niwot, CO 80503-0000
- **Phone:** (720) 494-7100 · **Fax:** (303) 652-0518
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Boulder Community Health (NPI 1740837137, Boulder, CO); Catholic Health Initiatives Colorado (NPI 1780047902, Longmont, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Louisville School Of Medicine, class of 1994
## Record status
- **NPPES last updated:** July 22, 2008
- **Other identifiers:** Medicare PIN 811532; Medicare UPIN G73260 (CO); Medicare ID-Type Unspecified 521278 (CO); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1184622888) · Data from the CMS NPPES public registry.