Matthew Duff

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

95013312 Issued in CA

Practice address

2 W Fern Ave
Redlands, CA 92373-5916

Phone

(909) 335-4102

NPI assigned

Dec 12, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

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

Nurse Practitioner

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

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

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mduff23092@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
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593
  Medicare reassignment NPD
• Redlands Family Practice Medical Group Inc.

  dba Optum

  • Family Medicine Physician
  • Redlands, CA
  • NPI 1942482021
  Medicare reassignment NPD
• 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
• Centers for Family Medicine GP

  dba Optumcare Medical Group

  • Family Medicine Physician
  • Los Alamitos, CA
  • NPI 1467598243
  NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Redlands Family Physicians Medical Associates, Inc.

  • Family Medicine Physician
  • Redlands, CA
  • NPI 1053390997
  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": "1576108800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763251200000",
    "number": "1558909226",
    "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": "2 W FERN AVE",
            "city": "REDLANDS",
            "state": "CA",
            "postal_code": "923735916",
            "telephone_number": "909-335-4102"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1113 Alta Ave Ste 220",
            "address_purpose": "LOCATION",
            "city": "Upland",
            "state": "CA",
            "postal_code": "917862803",
            "country_code": "US",
            "telephone_number": "909-985-1908",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DUFF",
        "first_name": "MATTHEW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-12-12",
        "last_updated": "2025-11-16",
        "certification_date": "2025-11-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "CA",
            "license": "95013312",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Madison Dreyer, SLPA
• DRS.Jeevan & Neela Ghatnekar DDS. Inc.
• Mayra I Duarte, MFT
• Victoria Dubois, LCSW
• Travis Dubuque
• Anthony Dai Duk, MD
• John P Dullaghan, AMFT
• Duncan a G Miles MD PC
• Kelsea Dunn
• Sierra Dunn, NP

• Family Nurse Practitioner in Redlands, CA
• Providers in Redlands, CA by specialty
• Family Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 16, 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.