NPIMap

Individual provider Active NPI

Matthew Benjamin Lancaster, MD

  • Internal Medicine Physician
  • Phoenix, AZ
National Provider Identifier
1255072138
Registry record updated Oct 14, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
4871752 Issued in ID
Practice address
1300 N 12TH St Ste 508
Phoenix, AZ 85006-2849
Phone
(602) 839-3927
Fax
(602) 839-4233
NPI assigned
Apr 5, 2022
Last updated
Oct 14, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Oct 14, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X NU
Internal Medicine Physician 207R00000X 4871752 ID Primary

Addresses

Primary practice location

1300 N 12TH St Ste 508
Phoenix, AZ 85006-2849

Mailing address

406 S 4TH St Apt 407
Boise, ID 83702-7693
Phone (864) 387-9382

Other practice location 1

4300 E Flamingo Ave
Nampa, ID 83687-3138
Phone (208) 463-5000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in ID
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250714000000 ID Practitioner - Internal Medicine 3577943216 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of South Carolina School of Medicine, 2022
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Sound Physicians of IdahoGroup PAC ID 4688705346, 47 clinicians

Practice addresses (Care Compare)

3025 W Cherry LN
Meridian, ID 83642-8531

4300 E Flamingo Ave
Nampa, ID 83687-3138
Phone (208) 205-1000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Saint Alphonsus Regional Medical Center Inc Current Accepting new patients
Sound Physicians of Idaho Internal Medicine CurrentSince Jun 30, 2025 Accepting new patients
Saint Alphonsus Regional Medical Center Inc CurrentSince Dec 1, 2025 Accepting new patients
Saint Alphonsus Regional Medical Center Inc CurrentSince Dec 1, 2025 Accepting new patients

Locations

3025 W Cherry Ln
Ste B
Meridian, ID 83642
Phone (208) 302-6400

1512 12th Ave Rd
Nampa, ID 83686
Phone (208) 463-5000

4300 E Flamingo Ave
Nampa, ID 83687
Phone (208) 205-1000

120 Brentwood Commons Way
Ste 510
Brentwood, TN 37027
Phone (253) 682-6040

Interoperability endpoints

  • Direct secure messaging: mlancaster4518059@direct.trinity-health.org

Organizations & group practices 4

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

Hospital & facility affiliations 7

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

NPI Registry JSON

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

{
    "created_epoch": "1649116800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1760400000000",
    "number": "1255072138",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "406 S 4TH ST APT 407",
            "city": "BOISE",
            "state": "ID",
            "postal_code": "837027693",
            "telephone_number": "864-387-9382"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1300 N 12TH ST STE 508",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850062849",
            "telephone_number": "602-839-3927",
            "fax_number": "602-839-4233"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4300 E Flamingo Ave",
            "address_purpose": "LOCATION",
            "city": "Nampa",
            "state": "ID",
            "postal_code": "836873138",
            "country_code": "US",
            "telephone_number": "208-463-5000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LANCASTER",
        "first_name": "MATTHEW",
        "middle_name": "BENJAMIN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-04-05",
        "last_updated": "2025-10-14",
        "certification_date": "2025-10-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "ID",
            "license": "4871752",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Phoenix, AZ

Sources for this page

Verify at the official NPI Registry.