Quick answers
- Does Stewart M. Long Iii accept Medicare assignment?
- Yes. Medicare's clinician data says Stewart M. Long Iii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Stewart M. Long Iii see?
- In 2024, CMS data shows 175 Original Medicare patients and 321 services for Stewart M. Long Iii. This counts Original Medicare only and measures volume, not quality.
- What is Stewart M. Long Iii's NPI number?
- 1588720007. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Stewart M. Long Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 175 |
|---|---|
| Services billed to Medicare | 321 |
| Different services or procedures | 72 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Replacement of aortic valve through the skin and femoral artery (33361)36 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)32 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)23 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)23 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)18 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease72%
- Heart failure55%
- Arthritis45%
- Chronic kidney disease40%
Hospitals where Stewart M. Long Iii works
Medicare's Facility Affiliation Data lists Stewart M. Long Iii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bitterroot Health - Daly HospitalHamilton, MT · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 271340
- Bozeman Health Deaconess HospitalBozeman, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270057
- Providence St Joseph Medical CenterPolson, MT · Critical Access Hospital · Emergency services: listed by Medicare · CCN 271343
- St Peters HealthHelena, MT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 270003
- St. Patrick HospitalMissoula, MT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 270014
Practice locations
Addresses where Stewart M. Long Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 500 W Broadway St, Suite 320Missoula, MT 59802 (406) 329‑5615
Group practices
Medicare enrollment lists Stewart M. Long Iii as a member of this group (CMS data updated October 2, 2026).
- Providence Health and Services Mt362 clinicians in the group
Specialties
- Thoracic Surgeryprimary
- General Surgeryalso
Other thoracic surgeons in Montana
Clinicians with the same Medicare primary specialty in Montana — not a recommendation.
Other clinicians in Providence Health and Services Mt
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Georgia School Of Medicine |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1588720007 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians