CATHERINE A MASCARENAS MS, FNP-C
NPI 1043347065
Nurse Practitioner in Littleton, CO
About Catherine A Mascarenas Ms, Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE A MASCARENAS MS, FNP-C (NPI 1043347065) is an individual nurse practitioner in Littleton, Colorado, licensed in Colorado (118557) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Catherine A Mascarenas Ms, Fnp-c 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 Reassignment
Medicare enrollment records show Catherine Mascarenas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lakewood, CO 80215
- Reassigned Medicare billing, Colorado enrollment
- 124 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 80128 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Catherine Mascarenas's NPI number?
The NPI number for Catherine Mascarenas is 1043347065. It was assigned to this individual provider in the NPPES registry on February 27, 2007.
Where is Catherine Mascarenas located?
Catherine Mascarenas practices at 7175 W Fremont Pl, Littleton, CO 80128. The listed phone number is (303) 518-1030.
What is Catherine Mascarenas's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Catherine Mascarenas enrolled in Medicare?
Yes. Catherine Mascarenas 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 organization bills Medicare for Catherine Mascarenas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Mascarenas reassigns Medicare benefits to Physician Housecalls LLC (Lakewood, 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 Catherine Mascarenas'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 Catherine Mascarenas was last updated on September 9, 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.
# Catherine A Mascarenas, MS, FNP-C · NPI 1043347065
Nurse Practitioner physician in Littleton, Colorado. Individual provider, active in the CMS NPPES registry since February 27, 2007.
## Identity
- **NPI:** 1043347065 (Entity type: Individual)
- **Enumerated:** February 27, 2007
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 118557 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 7175 W FREMONT PL, Littleton, CO 80128-4748
- **Phone:** (303) 518-1030
## 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:** Physician Housecalls LLC (NPI 1295789824, Lakewood, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** September 9, 2025
- **Other identifiers:** Medicaid 44130881 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1043347065) · Data from the CMS NPPES public registry.