KAREN J SUNDBY MD, PC
NPI 1306028246
Dermatology in Denver, CO
About Karen J Sundby Md, Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN J SUNDBY MD, PC (NPI 1306028246) is a healthcare organization registered as a dermatology in Denver, Colorado and active in the NPI registry since December 2007. The organization holds a CLIA Certificate of Compliance certificate valid through January 1, 2027 and lists Karen Joy Sundby, Physician Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Karen J Sundby Md, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by February 28, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Karen J Sundby MD, PC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Compliance 06D1054527
Karen J Sundby, MD, PC · Denver, COFrequently 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 Karen J Sundby MD, PC's NPI number?
The NPI number for Karen J Sundby MD, PC is 1306028246. It was assigned to this organization in the NPPES registry on December 3, 2007.
Where is Karen J Sundby MD, PC located?
Karen J Sundby MD, PC is located at 4700 Hale Parkway Suite 140, Denver, CO 80220. The listed phone number is (303) 388-8807.
What is Karen J Sundby MD, PC's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is Karen J Sundby MD, PC enrolled in Medicare?
Yes. Karen J Sundby MD, PC is registered in the Medicare PECOS enrollment system.
When is Karen J Sundby MD, PC's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Colorado, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Karen J Sundby MD, PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Micrographic Dermatologic Surgery (MDS)) reassigns their Medicare billing to Karen J Sundby MD, PC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Karen J Sundby MD, PC hold a CLIA laboratory certificate?
Yes. A Certificate of Compliance (number 06D1054527) is associated with this NPI, valid through January 1, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Karen J Sundby MD, PC was last updated on March 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Karen J Sundby Md, Pc · NPI 1306028246
Dermatology organization in Denver, Colorado. Organization record, active in the CMS NPPES registry since December 3, 2007.
## Identity
- **NPI:** 1306028246 (Entity type: Organization)
- **Enumerated:** December 3, 2007
- **Primary specialty:** Dermatology · taxonomy 207N00000X
- **Organization subpart:** No
- **Authorized official:** Karen Sundby, PHYSICIAN OWNER
## Practice location
- **Address:** 4700 HALE PARKWAY, SUITE 140, Denver, CO 80220-4050
- **Phone:** (303) 388-8807 · **Fax:** (303) 962-0315
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** February 28, 2027 (Non-DME Part B, Colorado, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Micrographic Dermatologic Surgery (MDS)) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 24, 2014
- **Other identifiers:** Other C805167 (CO); Medicare UPIN I33509 (CO)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1306028246) · Data from the CMS NPPES public registry.