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NABIYA NADIR SIDDIQUI MD
NPI 1518451640
Internal Medicine - Infectious Disease in Great Falls, MT

Active since June 21, 2018PECOS EnrolledAccepts Medicare Assignment
80.46/100
CMS Quality Rating
2800 11TH AVE S STE 29, GREAT FALLS, MT 59405(406) 731-8851(406) 731-8318 Get Directions Write a Review

NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 20, 2026, Nov 4, 2025, Apr 5, 2024 and 2 more (5 updates tracked since 2018).

About Nabiya Nadir Siddiqui Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NABIYA NADIR SIDDIQUI MD (NPI 1518451640) is an individual infectious disease provider in Great Falls, Montana, licensed in New York (313241) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS, is affiliated with Benefis Hospitals Inc, and maintains a secondary practice location in Buffalo.

NPPES Registry Identity

NPI1518451640
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameNABIYA NADIR SIDDIQUICredential: MD
Location Address2800 11TH AVE S STE 29Great Falls, MT 59405-5263
Mailing Address1401 25th St SGreat Falls, MT 59405-5183 · (406) 731-8888 · Fax (406) 731-8318
Phone(406) 731-8851
Fax(406) 731-8318
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateJune 21, 2018
Last NPPES UpdateMay 20, 20265 updates tracked since enumeration
NPPES CertifiedMay 20, 2026
✔ NPI 1518451640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
Licenses✔ Licensed in NY · 313241✔ Licensed in MT · 114298
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
2800 11TH AVE S STE 29, Great Falls, MT 59405
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Secondary Practice Location 1

Location 12157 Main StBuffalo, NY 14214-2692 · Phone (716) 862-1000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nabiya Nadir Siddiqui Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1658619127
PECOS Enrollment IDI20230629002577
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
147 services54 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
122 services52 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
78 services71 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
41 services41 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Benefis Hospitals Inc

Acute Care Hospitals · Great Falls, MT
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number270012
Location1101 26th St SGreat Falls, MT 59405 · Cascade County
Emergency services Birthing friendly

Pondera Medical Center

Critical Access Hospitals · Conrad, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271324
Location805 Sunset BlvdConrad, MT 59425 · Pondera County
Emergency services

Central Montana Medical Center

Critical Access Hospitals · Lewistown, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271345
Location408 Wendell AveLewistown, MT 59457 · Fergus County
Emergency services

Northern Montana Hospital

Critical Access Hospitals · Havre, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271348
Location30 13th StHavre, MT 59501 · Hill County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.52 typical visit price
range $56.81 – $172.26
Typical copayment $32.63 (range $14.20 – $43.06)
Most-billed visit code 99204
Established Patient
$100.16 typical visit price
range $18.24 – $140.32
Typical copayment $25.04 (range $4.56 – $35.08)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80.46/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality93.1
Promoting Interoperability75
Improvement Activities40
Cost62.61

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BOWEN AUSTIN STEPHEN TRYSTIANSON DNP
Nurse Practitioner
2800 11TH AVE S STE 29
GREAT FALLS, MT 59405
Cascade County (406) 731-8851

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nabiya Siddiqui's NPI number?

The NPI number for Nabiya Siddiqui is 1518451640. It was assigned to this individual provider in the NPPES registry on June 21, 2018.

Where is Nabiya Siddiqui located?

Nabiya Siddiqui practices at 2800 11th Ave S Ste 29, Great Falls, MT 59405. The listed phone number is (406) 731-8851.

What is Nabiya Siddiqui's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Nabiya Siddiqui enrolled in Medicare?

Yes. Nabiya Siddiqui is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Nabiya Siddiqui accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP and Providence Health Plan list Nabiya Siddiqui as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nabiya Siddiqui affiliated with any hospitals?

According to CMS data, Nabiya Siddiqui is affiliated with Benefis Hospitals Inc, Pondera Medical Center, Central Montana Medical Center and Northern Montana Hospital.

When was this NPI record last updated?

The NPPES record for Nabiya Siddiqui was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.