Quick answers
- Which hospitals does Mary J. De Leon work at?
- Medicare's official clinician data lists Mary J. De Leon at 4 hospitals: Calais Community Hospital, Eagle Butte Indian Health Service Hospital, Northern Light Mayo Hospital and St Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary J. De Leon see patients?
- Medicare's clinician data lists 6 practice locations, including Glenwood, MN, Cando, ND and Eagle Butte, SD. Call before your visit to confirm the address.
- What is Mary J. De Leon's specialty?
- Medicare lists Endocrinology as the primary specialty.
- Does Mary J. De Leon accept Medicare assignment?
- Yes. Medicare's clinician data says Mary J. De Leon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Mary J. De Leon offer telehealth?
- Medicare's clinician data says Mary J. De Leon offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary J. De Leon?
- (320) 634-4521, as listed in official Medicare / NPI Registry data.
- What is Mary J. De Leon's NPI number?
- 1184692006. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary J. De Leon works
Medicare's Facility Affiliation Data lists Mary J. De Leon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calais Community HospitalCalais, ME · Critical Access Hospital · CCN 201305
- Eagle Butte Indian Health Service HospitalEagle Butte, SD · Critical Access Hospital · CCN 431383
- Northern Light Mayo HospitalDover Foxcroft, ME · Critical Access Hospital · CCN 201309
- St Joseph HospitalBangor, ME · Acute Care Hospital · CCN 200001
Practice locations
Addresses where Mary J. De Leon is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 10 4th Ave SEGlenwood, MN 56334 (320) 634‑4521
- 228 1st AveCando, ND 58324 (701) 968‑2541
- 24276 166th Airport RdEagle Butte, SD 57625
- 400 Soldier Creek DrRosebud, SD 57570 (918) 457‑8945
- 900 BroadwayBangor, ME 04401 (207) 907‑1187
Group practices
Medicare enrollment lists Mary J. De Leon as a member of these groups (CMS data updated 2026-10-02).
- St Joseph Hospital199 clinicians in the group
- Glacial Ridge Hospital District73 clinicians in the group
- Rosebud Indian Health Service72 clinicians in the group
- Eagle Butte Indian Health Service Hospital42 clinicians in the group
- Towner County Medical Center Inc12 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Minnesota
Clinicians with the same Medicare primary specialty in Minnesota — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1184692006 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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