Quick answers
- Does Matthew S. Christianson accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew S. Christianson 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 Matthew S. Christianson see?
- In 2024, CMS data shows 411 Original Medicare patients and 436 services for Matthew S. Christianson. This counts Original Medicare only and measures volume, not quality.
- What is Matthew S. Christianson's NPI number?
- 1215148473. 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 Matthew S. Christianson, 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 | 411 |
|---|---|
| Services billed to Medicare | 436 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)195 services
- Emergency department visit with moderate level of medical decision making (99284)154 services
- Emergency department visit with low level of medical decision making (99283)44 services
- Critical care, first 30-74 minutes (99291)25 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%
- Arthritis56%
- Ischemic heart disease44%
- Diabetes43%
- Anxiety41%
Hospitals where Matthew S. Christianson works
Medicare's Facility Affiliation Data lists Matthew S. Christianson 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.
- Cary Medical CenterCaribou, ME · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 200031
- Cottage HospitalWoodsville, NH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 301301
- Harlan Arh HospitalHarlan, KY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 180050
- Marion General HospitalMarion, IN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 150011
- Regional One HealthMemphis, TN · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 440152
Practice locations
Addresses where Matthew S. Christianson is enrolled with Medicare (CMS data updated October 2, 2026).
- 163 Van Buren Rd, Suite 1Caribou, ME 04736 (207) 498‑3111
- 441 N Wabash AveMarion, IN 46952 (765) 660‑6000
- 877 Jefferson AveMemphis, TN 38103 (901) 545‑8336
Group practices
Medicare enrollment lists Matthew S. Christianson as a member of these groups (CMS data updated October 2, 2026).
- UT Regional One Physicians Inc324 clinicians in the group
- Marion General Hospital115 clinicians in the group
- City of Caribou37 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Caribou
Clinicians with the same Medicare primary specialty in Caribou, ME — not a recommendation.
Other clinicians in UT Regional One Physicians Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215148473 |
| 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