Quick answers
- Does Dennis G. Leland accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis G. Leland 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 Dennis G. Leland see?
- In 2024, CMS data shows 126 Original Medicare patients and 237 services for Dennis G. Leland. This counts Original Medicare only and measures volume, not quality.
- What is Dennis G. Leland's NPI number?
- 1467418772. 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 Dennis G. Leland, 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 | 126 |
|---|---|
| Services billed to Medicare | 237 |
| Different services or procedures | 50 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)35 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)27 services
- Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery (45384)16 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)15 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)12 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 pressure68%
- High cholesterol67%
- Arthritis38%
- Diabetes30%
- Chronic kidney disease26%
- Ischemic heart disease24%
Hospitals where Dennis G. Leland works
Medicare's Facility Affiliation Data lists Dennis G. Leland 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.
- Avera Gregory HospitalGregory, SD · Critical Access Hospital · Emergency services: listed by Medicare · CCN 431338
- Avera McKennan Hospital & University Health CenterSioux Falls, SD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 430016
- Avera Queen of PeaceMitchell, SD · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 431340
- Avera St Benedict Health Center - CAHParkston, SD · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 431330
- Platte Health CenterPlatte, SD · Critical Access Hospital · Emergency services: listed by Medicare · CCN 431306
Practice locations
Addresses where Dennis G. Leland is enrolled with Medicare (CMS data updated October 2, 2026).
- 110 S Logan Ave, Suite AGregory, SD 57533 (605) 835‑8394
- 401 W Glynn Dr, Avera St Benedict HospitalParkston, SD 57366 (605) 928‑3311
- 525 N Foster StMitchell, SD 57301
- 525 N Foster St, Hospital DeptMitchell, SD 57301 (605) 995‑2000
- 601 E 7th StPlatte, SD 57369
Group practices
Medicare enrollment lists Dennis G. Leland as a member of this group (CMS data updated October 2, 2026).
- Avera Queen of Peace122 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in South Dakota
Clinicians with the same Medicare primary specialty in South Dakota — not a recommendation.
Other clinicians in Avera Queen of Peace
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1467418772 |
| 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