Quick answers
- Does Douglas S. Larsen accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas S. Larsen 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 Douglas S. Larsen see?
- In 2024, CMS data shows 107 Original Medicare patients and 119 services for Douglas S. Larsen. This counts Original Medicare only and measures volume, not quality.
- What is Douglas S. Larsen's NPI number?
- 1003128059. 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 Douglas S. Larsen, 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 | 107 |
|---|---|
| Services billed to Medicare | 119 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Emergency department visit with moderate level of medical decision making (99284)50 services
- Emergency department visit with high level of medical decision making (99285)41 services
- Emergency department visit with low level of medical decision making (99283)11 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 pressure73%
- High cholesterol67%
- Arthritis50%
- Depression41%
- Anxiety41%
- Diabetes36%
Hospitals where Douglas S. Larsen works
Medicare's Facility Affiliation Data lists Douglas S. Larsen 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.
- Mayo Clinic Health System - Albert Lea and AustinAlbert Lea, MN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 240043
- Mayo Clinic Health System - Cannon FallsCannon Falls, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241346
- Mayo Clinic Health System - Lake CityLake City, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241338
- Mayo Clinic Health System - WasecaWaseca, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241345
- Mayo Clinic Health System in Red WingRed Wing, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240018
Practice locations
Addresses where Douglas S. Larsen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 1st Dr NWAustin, MN 55912 (507) 433‑7351
- 1025 Marsh StMankato, MN 56001 (507) 625‑4031
- 404 W Fountain StAlbert Lea, MN 56007 (507) 373‑2384
Group practices
Medicare enrollment lists Douglas S. Larsen as a member of these groups (CMS data updated October 2, 2026).
- Mayo Clinic Health System-Southwest Minnesota Region661 clinicians in the group
- Mayo Clinic Health System-Southeast Minnesota Region551 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Austin
Clinicians with the same Medicare primary specialty in Austin, MN — not a recommendation.
Other clinicians in Mayo Clinic Health System-Southwest Minnesota Region
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | University Of Iowa, Rj & L Carver College Of Medicine |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003128059 |
| 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