DR. MARK CHAN M.D.
NPI 1255569638
Physical Medicine & Rehabilitation in Boulder, CO
About Dr. Mark Chan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK CHAN M.D. (NPI 1255569638) is an individual physical medicine & rehabilitation provider in Boulder, Colorado, licensed in Colorado (DR.0069232) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS.
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. Mark Chan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Chan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boulder, CO 80304
- Reassigned Medicare billing, Colorado enrollment
- 5 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.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 16
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 Mark Chan's NPI number?
The NPI number for Mark Chan is 1255569638. It was assigned to this individual provider in the NPPES registry on June 24, 2009.
Where is Mark Chan located?
Mark Chan practices at 2121 Mesa Dr, Boulder, CO 80304. The listed phone number is (872) 231-3162.
What is Mark Chan's specialty?
The primary specialty registered for this NPI is Physical Medicine & Rehabilitation with taxonomy code 208100000X.
Is Mark Chan enrolled in Medicare?
Yes. Mark Chan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Chan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Chan reassigns Medicare benefits to Integrated Rehab Consultants Colorado LLC (Boulder, CO). 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 Mark Chan'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 Mark Chan was last updated on October 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.