NABIYA NADIR SIDDIQUI MD
NPI 1518451640
Internal Medicine - Infectious Disease in Great Falls, MT
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 St Peters Health, and maintains a secondary practice location in Buffalo.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
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.
Medicare Billing Reassignment
Medicare enrollment records show Nabiya Siddiqui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Great Falls, MT 59405
- Reassigned Medicare billing, Montana enrollment
- 637 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Peters Health
Acute Care Hospitals · Helena, MTBenefis Hospitals Inc
Acute Care Hospitals · Great Falls, MTPondera Medical Center
Critical Access Hospitals · Conrad, MTNorthern Montana Hospital
Critical Access Hospitals · Havre, MTPhysician 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.
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.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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.
Which organization bills Medicare for Nabiya Siddiqui's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nabiya Siddiqui reassigns Medicare benefits to Benefis Hospitals, Inc. (Great Falls, MT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nabiya Siddiqui's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nabiya Siddiqui accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans 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 St Peters Health, Benefis Hospitals Inc, Pondera 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 5 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.
# Nabiya Nadir Siddiqui, MD · NPI 1518451640
Infectious Disease physician in Great Falls, Montana. Individual provider, active in the CMS NPPES registry since June 21, 2018.
## Identity
- **NPI:** 1518451640 (Entity type: Individual)
- **Enumerated:** June 21, 2018
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 313241 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 2800 11TH AVE S STE 29, Great Falls, MT 59405-5263
- **Phone:** (406) 731-8851 · **Fax:** (406) 731-8318
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Benefis Hospitals, Inc. (NPI 1881650737, Great Falls, MT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** May 20, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1518451640) · Data from the CMS NPPES public registry.