Ashlea D. Semmens, MD

Medicare activity in 2024

Official CMS public-use data for Ashlea D. Semmens, 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.

Most frequent services

1. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)66 services
2. X-ray of surgical specimen (76098)57 services
3. Partial removal of breast (19301)41 services
4. Biopsy or removal of deep lymph nodes of underarm (38525)40 services
5. Imaging of lymph nodes during surgery (38900)39 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure66%
• High cholesterol63%
• Arthritis50%
• Anxiety30%
• Osteoporosis27%

Hospitals where Ashlea D. Semmens works

Medicare's Facility Affiliation Data lists Ashlea D. Semmens 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.

• Monument Health Rapid City HospitalRapid City, SD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 430077
• Monument Health Sturgis HospitalSturgis, SD · Critical Access Hospital · Emergency services: listed by Medicare · CCN 431321
• Same Day Surgery Center LLCRapid City, SD · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 430093

Practice locations

Addresses where Ashlea D. Semmens is enrolled with Medicare (CMS data updated October 2, 2026).

• 2805 5th StRapid City, SD 57701 (605) 755‑5700

Group practices

Medicare enrollment lists Ashlea D. Semmens as a member of this group (CMS data updated October 2, 2026).

• Monument Health Rapid City Hospital Inc564 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in South Dakota →

Other general surgeons in Rapid City

Clinicians with the same Medicare primary specialty in Rapid City, SD — not a recommendation.

• Tyler T. Bergstrom, MD
• Leslie A. Van Dyne, MD
• Wendy M. Peterson, MD
• Steven R. Donahue, MD
• David S. Fromm, MD
• Breanna L. Connett, DO
• Pial M. Hope, DO
• Marcus J. Tjeerdsma, MD

All general surgeons in Rapid City →

Other clinicians in Monument Health Rapid City Hospital Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Kyle J. Larson, DO
• Peter E. Ostler, MD
• Ami A. Garrigan, MD
• Christina M. Calamari, NP
• Diane T. Scaife, NP
• Hannah J. Selan, NP

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians