DR. MASON SIDNEY SHAMIS MD
NPI 1003075151
Family Medicine in Fort Collins, CO
About Dr. Mason Sidney Shamis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MASON SIDNEY SHAMIS MD (NPI 1003075151) is an individual family medicine provider in Fort Collins, Colorado, licensed in Colorado (47000) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
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 Sidney Shamis Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Mason Shamis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ft Collins, CO 80525
- Reassigned Medicare billing, Colorado enrollment
- 108 clinicians in this Medicare group
Arvada, CO 80002
- Reassigned Medicare billing, Colorado enrollment
- 32 clinicians in this Medicare group
Denver, CO 80230
- Reassigned Medicare billing, Colorado enrollment
- 31 clinicians in this Medicare group
Colorado Springs, CO 80906
- Reassigned Medicare billing, Colorado enrollment
- 32 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80528 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
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 Shamis's NPI number?
The NPI number for Mason Shamis is 1003075151. It was assigned to this individual provider in the NPPES registry on June 4, 2008.
Where is Mason Shamis located?
Mason Shamis practices at 2121 E Harmony Rd Suite 370, Fort Collins, CO 80528. The listed phone number is (970) 221-2290.
What is Mason Shamis's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mason Shamis enrolled in Medicare?
Yes. Mason Shamis is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mason Shamis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mason Shamis reassigns Medicare benefits to 4 organizations: Pathways Hospice (Ft Collins, CO), Hospice Of Metro Denver, Inc (Arvada, CO), Care Synergy Medical Group LLC (Denver, CO) and Pikes Peak Hospice And Palliative Care Inc (Colorado Springs, 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 Mason Shamis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mason Shamis accept?
Health plans from Select Health list Mason Shamis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mason Shamis was last updated on November 3, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Mason Sidney Shamis, MD · NPI 1003075151
Family Medicine physician in Fort Collins, Colorado. Individual provider, active in the CMS NPPES registry since June 4, 2008.
## Identity
- **NPI:** 1003075151 (Entity type: Individual)
- **Enumerated:** June 4, 2008
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 47000 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 2121 E HARMONY RD, SUITE 370, Fort Collins, CO 80528-3400
- **Phone:** (970) 221-2290 · **Fax:** (970) 221-2293
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Pathways Hospice (NPI 1003520859, Ft Collins, CO); Hospice Of Metro Denver, Inc (NPI 1083450811, Arvada, CO); Care Synergy Medical Group LLC (NPI 1841072212, Denver, CO); Pikes Peak Hospice And Palliative Care Inc (NPI 1245362169, Colorado Springs, CO) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 3, 2014
- **Other identifiers:** Other COAAA1097 (CO); Medicaid 18050867 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1003075151) · Data from the CMS NPPES public registry.