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DR. GREGORY S TIERNEY M.D.
NPI 1679519870
Orthopaedic Surgery - Sports Medicine in Great Falls, MT

Active since June 22, 2006PECOS EnrolledAccepts Medicare Assignment
80.46/100
CMS Quality Rating
1401 25TH ST S, GREAT FALLS, MT 59405(406) 731-8888(406) 731-8876 Get Directions Write a Review

NPPES record last updated: April 5, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 5, 2024, Jul 21, 2022, Feb 3, 2022 and 2 more (5 updates tracked since 2017).

About Dr. Gregory S Tierney M.d. NPPES

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

DR. GREGORY S TIERNEY M.D. (NPI 1679519870) is an individual sports medicine provider in Great Falls, Montana, licensed in Montana (7579) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Benefis Hospitals Inc, and is a graduate of University Of Washington School Of Medicine (1988).

NPPES Registry Identity

NPI1679519870
Entity TypeIndividualMale
Primary Taxonomy207XX0005X
Provider Legal NameDR. GREGORY S TIERNEYCredential: M.D.
Location Address1401 25TH ST SGreat Falls, MT 59405-5183
Mailing Address1401 25th St SGreat Falls, MT 59405-5183 · (406) 731-8888 · Fax (406) 731-8876
Phone(406) 731-8888
Fax(406) 731-8876
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 1988
Enumeration DateJune 22, 2006
Last NPPES UpdateApril 5, 20245 updates tracked since enumeration
NPPES CertifiedDecember 8, 2022
✔ NPI 1679519870 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Sports MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207XX0005X
License✔ Licensed in MT · 7579
Definition
An orthopaedic surgeon trained in sports medicine provides appropriate care for all structures of the musculoskeletal system directly affected by participation in sporting activity. This specialist is proficient in areas including conditioning, training and fitness, athletic performance and the impact of dietary supplements, pharmaceuticals, and nutrition on performance and health, coordination of care within the team setting utilizing other health care professionals, field evaluation and management, soft tissue biomechanics and injury healing and repair. Knowledge and understanding of the principles and techniques of rehabilitation, athletic equipment and orthotic devices enables the specialist to prevent and manage athletic injuries.
1401 25TH ST S, Great Falls, MT 59405
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Other Identifiers 6

Other000007501MT · Blue Cross Blue Shield
Other200019136MT · Railroad Medicare
Other810347861008MT · Ebms
Medicaid0103571MT
Other0136986MT · Washington L&i
Other810347861MT · Champus

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, PacificSource Health Plans, 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

Dr. Gregory S Tierney M.d. 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 ID8022159433
PECOS Enrollment IDI20100507000667
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

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
12 services11 patients

Hospital Affiliations CMS Care Compare

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

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 20

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

RETTE MARIE RILEY OLSEN DNP, APRN, FNP-C
Nurse Practitioner (Family)
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8888
ELIAS J. BAIED DO
Internal Medicine (Infectious Disease)
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8888
ADRIENNE MARY KRYSIAK
Emergency Medicine
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8888
KAYTLIN G DEVENEY PA
Physician Assistant
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 455-5000
SYDNE SKAER
Nurse Practitioner (Family)
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8888
MORRIS LYNN JESSOP M.D.
Urology
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8888
ANDREA LYNN DUDDINGTON
Physical Therapy Assistant
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8930
WILLIAM E HENNING DO
Psychiatry & Neurology (Neurology)
1401 25TH ST S
GREAT FALLS, MT 59405
Cascade County (406) 731-8817

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 Gregory Tierney's NPI number?

The NPI number for Gregory Tierney is 1679519870. It was assigned to this individual provider in the NPPES registry on June 22, 2006.

Where is Gregory Tierney located?

Gregory Tierney practices at 1401 25th St S, Great Falls, MT 59405. The listed phone number is (406) 731-8888.

What is Gregory Tierney's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.

Is Gregory Tierney enrolled in Medicare?

Yes. Gregory Tierney 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 Gregory Tierney accept?

Health plans from Blue Cross and Blue Shield of Montana, PacificSource Health Plans and Providence Health Plan list Gregory Tierney 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 Gregory Tierney affiliated with any hospitals?

According to CMS data, Gregory Tierney is affiliated with Benefis Hospitals Inc.

When was this NPI record last updated?

The NPPES record for Gregory Tierney was last updated on April 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.