NPIMap

Individual provider Active NPI

Nabiya Nadir Siddiqui, MD

  • Infectious Disease Physician
  • Great Falls, MT
National Provider Identifier
1518451640
Registry record updated May 20, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Infectious Disease PhysicianTaxonomy code 207RI0200X
License
313241 Issued in NY
Practice address
2800 11TH Ave S Ste 29
Great Falls, MT 59405-5263
Phone
(406) 731-8851
Fax
(406) 731-8318
NPI assigned
Jun 21, 2018
Last updated
May 20, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 20, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Infectious Disease Physician 207RI0200X 313241 NY Primary
Infectious Disease Physician 207RI0200X 114298 MT

Addresses

Primary practice location

2800 11TH Ave S Ste 29
Great Falls, MT 59405-5263

Mailing address

1401 25TH St S
Great Falls, MT 59405-5183
Phone (406) 731-8888

Other practice location 1

2157 Main St
Buffalo, NY 14214-2692
Phone (716) 862-1000

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address nsiddiqui20548@benefishs.direct-ci.com Benefis Hospitals Inc

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MT
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
I20230629002577 MT Practitioner - Infectious Disease 1658619127 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Infectious Disease
Education
Other, 2015
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Benefis Hospitals IncGroup PAC ID 1153235296, 390 clinicians

Practice addresses (Care Compare)

1101 26TH St S
Great Falls, MT 59405-5161
Phone (406) 455-5000

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
82.99 of 100Reported as group
Quality
62.64
Promoting interoperability
100
Improvement activities
40
Cost
80.67

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
114298MTMDInfectious Disease Physician
313241NYMDInfectious Disease Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Benefis Hospitals Inc CurrentSince Jun 30, 2023 Accepting new patients
Benefis Hospitals, Inc. CurrentSince Jun 30, 2023 Accepting new patients
Benefis Hospitals, Inc. Past Accepting new patients

Locations

1101 26th St S
Great Falls, MT 59405
Phone (406) 455-4690

1101 26th St S
Fl 5
Great Falls, MT 59405
Phone (406) 455-2132

1401 25th St S
Great Falls, MT 59405
Phone (406) 455-3650

2800 11th Ave S
Ste 29
Great Falls, MT 59405
Phone (406) 622-3357

Interoperability endpoints

  • Direct secure messaging: nsiddiqui20548@benefishs.direct-ci.com

Organizations & group practices 3

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 9

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": "1529539200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779235200000",
    "number": "1518451640",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1401 25TH ST S",
            "city": "GREAT FALLS",
            "state": "MT",
            "postal_code": "594055183",
            "telephone_number": "406-731-8888",
            "fax_number": "406-731-8318"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2800 11TH AVE S STE 29",
            "city": "GREAT FALLS",
            "state": "MT",
            "postal_code": "594055263",
            "telephone_number": "406-731-8851",
            "fax_number": "406-731-8318"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2157 Main St",
            "address_purpose": "LOCATION",
            "city": "Buffalo",
            "state": "NY",
            "postal_code": "142142692",
            "country_code": "US",
            "telephone_number": "716-862-1000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIDDIQUI",
        "first_name": "NABIYA",
        "middle_name": "NADIR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-06-21",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RI0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "NY",
            "license": "313241",
            "primary": true
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "MT",
            "license": "114298",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "nsiddiqui20548@benefishs.direct-ci.com",
            "affiliation": "Y",
            "affiliationName": "Benefis Hospitals Inc",
            "address_1": "1401 25th St S",
            "city": "Great Falls",
            "state": "MT",
            "country_code": "US",
            "postal_code": "594055183",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Great Falls, MT

Sources for this page

Verify at the official NPI Registry.