Dr. Nathanial J. Madsen
- Gender: Male
- Experience: 16 years
- Graduated from: Loyola University Of Chicago, Stritch School Of Medicine
- Graduation year: 2005
- Sole propriator: No
- NPI: 1609927607
Dr. Nathanial J. Madsen M.D.
Cardiologist
He is located at 937 Highland Boulevard Suite 5510 in Bozeman, MT 59715. Can help patients with the following: Chest Pain, Congestive Heart Failure (CHF), Constipation, Heart Valve Disease, Hyponatremia, Nausea and Vomiting. His National Provider Identifier (NPI) number is 1609927607. Appointment can be made via the phone number (406) 414-3959. He is affiliated with 2 practices and 3 hospitals.
Conditions treated
Dr. Nathaniel John Madsen, being an cardiologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Nathanial J. Madsen.
- Abdominal Aortic Aneurysm (AAA)
- Abdominal Pain
- Acute Pain
- Amyloidosis
- Anemia
- Angina
- Aortic Stenosis
- Arrhythmia
- Arthritis
- Asthma
- Atherosclerosis
- Atrial Fibrillation
- Atrial Flutter
- Atrial Septal Defect (ASD)
- Birth Defects
- Bladder Control
- Blood Clots
- Bradycardia
- Cardiomyopathy
- Carotid Artery Disease
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Chronic Venous Insufficiency
- Common Cold
- Congenital Heart Disease (CHD)
- Congestive Heart Failure (CHF)
- Constipation
- Cystitis
- Diarrhea
- Edema
- Endocarditis
- Fainting
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Headache
- Heart Attack
- Heart Disease
- Heart Murmur
- Heart Valve Disease
- Hiatal Hernia
- High Blood Pressure
- High Cholesterol
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Influenza
- Inguinal Hernia
- May-Thurner Syndrome
- Migraine
- Mitral Insufficiency
- Mitral Valve Prolapse (MVP)
- Mitral Valve Stenosis
- Myocarditis
- Nausea and Vomiting
- Obesity
- Orthostatic Hypotension
- Osteoporosis
- Pacemaker
- Palpitations
- Paroxysmal Supraventricular Tachycardia (PSVT)
- Peptic Ulcer
- Pericardial Tamponade
- Pericarditis
- Postural Orthostatic Tachycardia Syndrome (POTS)
- Premature Ventricular Contraction (PVC)
- Prescription Refill
- Pulmonary Edema
- Pulmonary Embolism (PE)
- Pulmonary Hypertension (PH)
- Renal Vascular Disease
- Rheumatic Fever
- Rheumatic Heart Disease
- Stroke
- Urethritis
- Urinary Tract Infection (UTI)
- Ventricular Fibrillation
- Ventricular Septal Defect (VSD)
- Wolff-Parkinson-White Syndrome (WPW)
Procedures Performed by Dr. Nathanial J. Madsen
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Nathanial J. Madsen as in-network for the following 2026 plans.
Health plans
Blue Cross and Blue Shield of Montana
Network data as of Jun 7, 2026, as reported by the insurer.
Show all 19 plans from Blue Cross and Blue Shield of Montana
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Blue Focus Bronze POS℠ 205 (3 plan variants) | POS · Expanded Bronze | Blue Focus POS | Not accepting new patients |
| Blue Focus Bronze POS℠ 705 (3 plan variants) | POS · Bronze | Blue Focus POS | Not accepting new patients |
| Blue Focus Bronze POS℠ Standard (3 plan variants) | POS · Expanded Bronze | Blue Focus POS | Not accepting new patients |
| Blue Focus Gold POS℠ 207 (3 plan variants) | POS · Gold | Blue Focus POS | Not accepting new patients |
| Blue Focus Gold POS℠ 902 (3 plan variants) | POS · Gold | Blue Focus POS | Not accepting new patients |
| Blue Focus Gold POS℠ Standard (3 plan variants) | POS · Gold | Blue Focus POS | Not accepting new patients |
| Blue Focus Silver POS℠ 206 (3 plan variants) | POS · Silver | Blue Focus POS | Not accepting new patients |
| Blue Focus Silver POS℠ 903 (3 plan variants) | POS · Silver | Blue Focus POS | Not accepting new patients |
| Blue Focus Silver POS℠ Standard (3 plan variants) | POS · Silver | Blue Focus POS | Not accepting new patients |
| Blue Preferred Bronze PPO℠ 201 (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Bronze PPO℠ 202 (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Bronze PPO℠ Standard (4 plan variants) | PPO · Expanded Bronze | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Gold PPO℠ 204 (4 plan variants) | PPO · Gold | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Gold PPO℠ 901 (4 plan variants) | PPO · Gold | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Gold PPO℠ Standard (4 plan variants) | PPO · Gold | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Security PPO℠ 200 (4 plan variants) | PPO · Catastrophic | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Silver PPO℠ 203 (4 plan variants) | PPO · Silver | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Silver PPO℠ 308 (4 plan variants) | PPO · Silver | Blue Preferred PPO | Not accepting new patients |
| Blue Preferred Silver PPO℠ Standard (4 plan variants) | PPO · Silver | Blue Preferred PPO | Not accepting new patients |
Mountain Health CO-OP
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 22 plans from Mountain Health CO-OP
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| PEAK PPO BRONZE | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Bronze HDHP | PPO · Expanded Bronze | Preferred | Accepting new patients |
| PEAK PPO BRONZE HDHP | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Bronze Standard | PPO · Expanded Bronze | Preferred | Accepting new patients |
| Peak PPO Catastrophic | PPO · Catastrophic | Preferred | Accepting new patients |
| Peak PPO Gold | PPO · Gold | Preferred | Accepting new patients |
| PEAK PPO GOLD | PPO · Gold | Preferred | Accepting new patients |
| PEAK PPO GOLD HDHP | PPO · Gold | Preferred | Accepting new patients |
| Peak PPO Gold Standard | PPO · Gold | Preferred | Accepting new patients |
| Peak PPO Silver | PPO · Silver | Preferred | Accepting new patients |
| PEAK PPO SILVER | PPO · Silver | Preferred | Accepting new patients |
| PEAK PPO SILVER HDHP | PPO · Silver | Preferred | Accepting new patients |
| Peak PPO Silver Standard | PPO · Silver | Preferred | Accepting new patients |
| Plus Bronze (2 plan variants) | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Bronze HDHP | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Bronze Standard | PPO · Expanded Bronze | Tier Two | Accepting new patients |
| Plus Gold (2 plan variants) | PPO · Gold | Tier Two | Accepting new patients |
| Plus Gold HDHP | PPO · Gold | Tier Two | Accepting new patients |
| Plus Gold Standard | PPO · Gold | Tier Two | Accepting new patients |
| Plus Silver | PPO · Silver | Tier Two | Accepting new patients |
| Plus Silver HDHP | PPO · Silver | Tier Two | Accepting new patients |
| Plus Silver Standard | PPO · Silver | Tier Two | Accepting new patients |
PacificSource Health Plans
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 8 plans from PacificSource Health Plans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Core Bronze HSA 10600 | EPO · Bronze | Tier One | Accepting new patients |
| Core Bronze HSA 8300 | EPO · Expanded Bronze | Tier One | Accepting new patients |
| Core Gold 1500 | EPO · Gold | Tier One | Accepting new patients |
| Core Silver 3500 | EPO · Silver | Tier One | Accepting new patients |
| Core Silver 5000 | EPO · Silver | Tier One | Accepting new patients |
| Core Standard Expanded Bronze HSA | EPO · Expanded Bronze | Tier One | Accepting new patients |
| Core Standard Gold | EPO · Gold | Tier One | Accepting new patients |
| Core Standard Silver | EPO · Silver | Tier One | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Nathanial J. Madsen is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Nathanial J. Madsen is enrolled to bill Medicare as a Practitioner - Interventional Cardiology (also registered under: Practitioner - Internal Medicine, Practitioner - Cardiovascular Disease (cardiology)) .
Bills through: Bozeman Health Deaconess Hospital
Based on Medicare's public enrollment records as of Sep 29, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| AstraZeneca | $14 |
| Medtronic | $12 |
Other
| Food and Beverage | $28 |
Studies
LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated in 2005Additional Specialities
- Internist
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Questions & Answers
Does Dr. Nathaniel John Madsen have affiliation with practices?
Dr. Nathaniel John Madsen is affiliated with Billings Clinic Hospital. For the full list of practices see this list.
Does Dr. Nathaniel John Madsen accept patients with Mountain Health CO-OP?
Yes, Dr. Nathaniel John Madsen is listed in-network for Mountain Health CO-OP through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
What conditions does Dr. Nathaniel John Madsen treat?
Dr. Nathaniel John Madsen provides treatment for Chest Pain, Congestive Heart Failure (CHF), Constipation, Heart Valve Disease, Hyponatremia, Nausea and Vomiting. For the full list see this list.
Has Dr. Nathaniel John Madsen affiliation with hospitals?
Dr. Nathaniel John Madsen is affiliated with BILLINGS CLINIC. For the full list of hospitals see this list.
Where can you meet with Dr. Nathaniel John Madsen?
Dr. Nathaniel John Madsen's office is located at 937 Highland Boulevard Suite 5510 in Bozeman, MT 59715.