Catherine A Mascarenas, MS, FNP-C

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

118557 Issued in CO

Practice address

7175 W Fremont PL
Littleton, CO 80128-4748

Phone

(303) 518-1030

NPI assigned

Feb 27, 2007

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CO

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2002

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Physician Housecalls LLCGroup PAC ID 0840212809, 124 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science, Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/CICGBD

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Physician Housecalls LLC

  • Internal Medicine Physician
  • Lakewood, CO
  • NPI 1295789824
  Medicare reassignment Care Compare group NPD
• Kaiser Foundation Health Plan of Colorado

  • Multi-Specialty Clinic/Center
  • Aurora, CO
  • NPI 1407963911
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1172534400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757376000000",
    "number": "1043347065",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7175 W FREMONT PL",
            "city": "LITTLETON",
            "state": "CO",
            "postal_code": "801284748"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "7175 W FREMONT PL",
            "city": "LITTLETON",
            "state": "CO",
            "postal_code": "801284748",
            "telephone_number": "303-518-1030"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASCARENAS",
        "first_name": "CATHERINE",
        "middle_name": "A",
        "credential": "MS, FNP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-02-27",
        "last_updated": "2025-09-09",
        "certification_date": "2025-09-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "CO",
            "license": "118557",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "44130881",
            "state": "CO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepiceast.kp.org:14430/Interconnect-prodcom/wcf/epic.community.hie/xcpdrespondinggateway",
            "affiliation": "N",
            "endpointDescription": "Carequality",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "2550 S Parker Rd",
            "city": "Aurora",
            "state": "CO",
            "country_code": "US",
            "postal_code": "800141622",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Rebecca Martinez, RBT
• Geralyn Marie Martucci, LPN
• Cassandra Marvin
• Linda D Marx
• Cheryl A Masani, CHOM, CMT, CA
• Kristine Marie Mason, LCSW
• Meredith Mason, PT, DPT
• Lena Masri
• Nicole M Massa, R.D.H.
• Valentina Masse

• Nurse Practitioner in Littleton, CO
• Providers in Littleton, CO by specialty
• Nurse Practitioner in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 9, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.