Marie Ellen Nielsen, MS, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA18155 Issued in CA

Practice address

1600 E Citrus Ave Ste a
Redlands, CA 92374-4802

Phone

(909) 389-1304

NPI assigned

Jan 26, 2012

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 2

Medicare fee-for-service enrollment

Enrolled in CA

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

Physician Assistant

Education

Other, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Beaver Medical Group P CGroup PAC ID 0547164295, 251 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Redlands Community Hospital Hospital, Redlands, CA, CCN 050272

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science, Physician Assistant

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: marie.gerlach.p33@direct.monarchhealthcare.nextgenshare.com
• Direct secure messaging: mgerlach24784@epiclp.direct-ci.com

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.

• Beaver Medical Group P C

  dba Optum

  • Family Medicine Physician
  • Redlands, CA
  • NPI 1649503319
  Medicare reassignment Care Compare group NPD
• Centers for Family Medicine GP

  dba Optumcare Medical Group

  • Family Medicine Physician
  • Los Alamitos, CA
  • NPI 1467598243
  Medicare reassignment
• Beaver Medical Group P C

  • Physical Therapist
  • Redlands, CA
  • NPI 1427090281
  NPD
• Cassidy Medical Group Inc.

  • Multi-Specialty Clinic/Center
  • Vista, CA
  • NPI 1215003470
  NPD
• Beaver Medical Group P C

  dba Beaver Advantage Health Center

  • Family Medicine Physician
  • Redlands, CA
  • NPI 1275570830
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Redlands Community Hospital

  • General Acute Care Hospital
  • Redlands, CA
  • NPI 1043354111
  Care Compare affiliation

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

{
    "created_epoch": "1327536000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767484800000",
    "number": "1396016093",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1600 E CITRUS AVE STE A",
            "city": "REDLANDS",
            "state": "CA",
            "postal_code": "923744802",
            "telephone_number": "909-389-1304"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NIELSEN",
        "first_name": "MARIE",
        "middle_name": "ELLEN",
        "name_prefix": "Miss",
        "credential": "MS, PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2012-01-26",
        "last_updated": "2026-01-04",
        "certification_date": "2026-01-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA18155",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICAL LICENSE",
            "identifier": "PA18155",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE",
            "identifier": "PENDING",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Thao Phuong Nguyen, PHARMD
• Nhon Nguyen, M.D. and Anh Nong, M.D., Inc.
• Nicholas J. Williams, DDS, a Professional Corporation
• Rick Jason Nichols, DDS
• Virginia Nicolas, RESPIRATORY THERAPY
• Kayla Niere
• Jessica Nieves, SLP
• Ellicia Darlene Nikijuluw
• Mary Elizabeth Nikityn, PSY.D.
• Alireza Nikpour, PMHNP

• Physician Assistant in Redlands, CA
• Providers in Redlands, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 4, 2026; 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.