Quick answers
- Does Andrew G. Keenan accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew G. Keenan 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 Andrew G. Keenan see?
- In 2024, CMS data shows 206 Original Medicare patients and 601 services for Andrew G. Keenan. This counts Original Medicare only and measures volume, not quality.
- What is Andrew G. Keenan's NPI number?
- 1821239161. 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 Andrew G. Keenan, 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 | 206 |
|---|---|
| Services billed to Medicare | 601 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Critical care, first 30-74 minutes (99291)72 services
- Test to examine how well the lungs exchange gases (94729)59 services
- Test to determine lung volumes using sensors (94726)57 services
- Test to measure expiratory airflow and volume changes before and after medication administration (94060)35 services
- Exam of lung airways and sampling of lymph nodes using an endoscope and ultrasound guidance, 1-2 lymph nodes (31652)30 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 cholesterol70%
- COPD49%
- Ischemic heart disease47%
- Arthritis40%
- Heart failure39%
Hospitals where Andrew G. Keenan works
Medicare's Facility Affiliation Data lists Andrew G. Keenan 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.
- Essentia Health Deer RiverDeer River, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241360
- Essentia Health DuluthDuluth, MN · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 240019
- Essentia Health St Mary's Medical CenterDuluth, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240002
- Essentia Health VirginiaVirginia, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 240084
- St Marys Hospital SuperiorSuperior, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521329
Practice locations
Addresses where Andrew G. Keenan is enrolled with Medicare (CMS data updated October 2, 2026).
- 400 E 3rd StDuluth, MN 55805 (218) 786‑8364
Group practices
Medicare enrollment lists Andrew G. Keenan as a member of this group (CMS data updated October 2, 2026).
- The Duluth Clinic Ltd1,144 clinicians in the group
Specialties
- Critical Care (Intensivists)primary
- Hospitalistalso
- Internal Medicinealso
Find other Critical Care (Intensivists) doctors in Minnesota →
Other critical care doctors in Duluth
Clinicians with the same Medicare primary specialty in Duluth, MN — not a recommendation.
Other clinicians in The Duluth Clinic Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2008 (18 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) | 1821239161 |
| 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