Quick answers
- Does Dimitrios Koudoumas accept Medicare assignment?
- Yes. Medicare's clinician data says Dimitrios Koudoumas 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 Dimitrios Koudoumas see?
- In 2024, CMS data shows 223 Original Medicare patients and 792 services for Dimitrios Koudoumas. This counts Original Medicare only and measures volume, not quality.
- What is Dimitrios Koudoumas's NPI number?
- 1639456767. 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 Dimitrios Koudoumas, 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 | 223 |
|---|---|
| Services billed to Medicare | 792 |
| Different services or procedures | 118 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)68 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)49 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)49 services
- Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (G2212)36 services
- Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)33 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 disease60%
- Arthritis53%
- Diabetes48%
- COPD43%
Hospitals where Dimitrios Koudoumas works
Medicare's Facility Affiliation Data lists Dimitrios Koudoumas 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.
- Benefis Hospitals IncGreat Falls, MT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 270012
- Great Falls Clinic HospitalGreat Falls, MT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 270086
- Northern Montana HospitalHavre, MT · Critical Access Hospital · Emergency services: listed by Medicare · CCN 271348
- St Peters HealthHelena, MT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 270003
Practice locations
Addresses where Dimitrios Koudoumas is enrolled with Medicare (CMS data updated October 2, 2026).
- 1101 26th St SGreat Falls, MT 59405 (406) 455‑5000
Group practices
Medicare enrollment lists Dimitrios Koudoumas as a member of this group (CMS data updated October 2, 2026).
- Benefis Hospitals Inc384 clinicians in the group
Specialties
- Thoracic Surgeryprimary
Other thoracic surgeons in Montana
Clinicians with the same Medicare primary specialty in Montana — not a recommendation.
Other clinicians in Benefis Hospitals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639456767 |
| 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