RILEY SEAN GROGAN MD
NPI 1669935631
Surgery in Missoula, MT

Q: What is Riley Grogan's NPI number?

The NPI number for Riley Grogan is 1669935631. It was assigned to this individual provider in the NPPES registry on April 8, 2019.

Q: What is Riley Grogan's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Riley Grogan was last updated on November 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since April 08, 2019PECOS EnrolledAccepts Medicare Assignment

500 W BROADWAY ST FL 4BB, MISSOULA, MT 59802(406) 329-5828(406) 329-5864 Get Directions Write a Review

NPPES record last updated: November 16, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 16, 2025, Apr 12, 2024, Apr 8, 2019 (3 updates tracked since 2019).

On this page

About Riley Sean Grogan Md NPPES

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

RILEY SEAN GROGAN MD (NPI 1669935631) is an individual surgery provider in Missoula, Montana, licensed in Montana (MED-PHYS-LIC-156377) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, is affiliated with St. Patrick Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1669935631

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameRILEY SEAN GROGANCredential: MD

Location Address500 W BROADWAY ST FL 4BBMissoula, MT 59802-4008

Mailing AddressPo Box 31001Pasadena, CA 91110-4110 · (406) 329-5828 · Fax (406) 329-5864

Phone(406) 329-5828

Fax(406) 329-5864

Sole ProprietorNo

Medical School CMSUniversity Of Washington School Of MedicineGraduated 2019

Enumeration DateApril 8, 2019

Last NPPES UpdateNovember 16, 20253 updates tracked since enumeration

NPPES CertifiedNovember 16, 2025

✔ NPI 1669935631 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

Licenses✔ Licensed in MT · MED-PHYS-LIC-156377✔ Licensed in WI · 74548-20

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

500 W BROADWAY ST FL 4BB, Missoula, MT 59802

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Secondary Practice Locations 2

Location 11836 South AveLA Crosse, WI 54601-5429 · Phone (608) 782-7300

Location 2169 Ashley Ave Rm 202Charleston, SC 29425-5429 · Phone (406) 871-3770

Accepted Insurance

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

Riley Sean Grogan 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 ID3274868724

PECOS Enrollment IDI20251007001011

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.

Hospital Affiliations CMS Care Compare

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

St. Patrick Hospital

Acute Care Hospitals · Missoula, MT

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number270014

Location500 W BroadwayMissoula, MT 59806 · Missoula County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59802 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

$87.97 typical visit price

range $56.81 – $172.26

Typical copayment $21.99 (range $14.20 – $43.06)

Most-billed visit code 99203

Established Patient

$70.82 typical visit price

range $18.24 – $140.32

Typical copayment $17.70 (range $4.56 – $35.08)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

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

DR. ELISE ANNE ABICHT MD

Obstetrics & Gynecology

500 W BROADWAY ST FL 4BB
MISSOULA, MT 59802

Missoula County (406) 329-5828

RYAN BACHOFER MD

Colon & Rectal Surgery

500 W BROADWAY ST FL 4BB
MISSOULA, MT 59802

Missoula County (406) 329-5828

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 Riley Grogan's NPI number?

The NPI number for Riley Grogan is 1669935631. It was assigned to this individual provider in the NPPES registry on April 8, 2019.

Where is Riley Grogan located?

Riley Grogan practices at 500 W Broadway St Fl 4bb, Missoula, MT 59802. The listed phone number is (406) 329-5828.

What is Riley Grogan's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Riley Grogan enrolled in Medicare?

Yes. Riley Grogan 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 Riley Grogan accept?

Health plans from Blue Cross and Blue Shield of Montana and Providence Health Plan list Riley Grogan 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 Riley Grogan affiliated with any hospitals?

According to CMS data, Riley Grogan is affiliated with St. Patrick Hospital.

When was this NPI record last updated?

The NPPES record for Riley Grogan was last updated on November 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.