Dr. Ashlea D. Semmens, MD
- Medicare services, 2024
- 425
- Medicare patients, 2024
- 104
- Part D claims, 2024
- 84
- Hospital affiliations
- 3
- Industry payments
- $7,126
- Practice address
- 353 Fairmont Blvd, Rapid City, SD 57701
- Practice phone
- Call (605) 755-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Semmens' professional email, personal email and mobile number
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Dr. Ashlea D. Semmens is a general surgeon in Rapid City, South Dakota
Dr. Semmens practices at Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health.
Dr. Semmens' NPI, 1023548633, was assigned on June 15, 2017. Dr. Semmens graduated from University of Washington School of Medicine in 2017. Dr. Semmens holds Iowa license R-11004.
- NPI
- 1023548633NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890063556
- NPI enumeration date
- June 15, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (605) 755-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ashlea D. Semmens practices at Monument Health Rapid City Hospital in Rapid City, South Dakota
Dr. Semmens' primary practice is Monument Health Rapid City Hospital, at 353 Fairmont Blvd, Rapid City, SD 57701 in Pennington County. The practice phone is (605) 755-1000.
- Monument Health Rapid City Hospital353 Fairmont Blvd, Rapid City, SD 57701 · Pennington CountyPhone(605) 755-1000
Source: Dmand AI Affiliation Data
Dr. Ashlea D. Semmens is affiliated with 3 sites of care and 1 medical group
Dr. Semmens' primary practice is Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health. Dr. Semmens is also affiliated with Same Day Surgery Center. The medical group on file is Monument Health Rapid City Hospital. Dmand AI also links Dr. Semmens to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ashlea D. Semmens' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Semmens practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Monument Health Rapid City Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Monument Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ashlea D. Semmens is one of 105 general surgeons in South Dakota
Surgery is Dr. Semmens' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Semmens is licensed in Iowa.
Specialties and state licenses
- Surgery, IowaPrimary
General surgeons near Dr. Semmens
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ashlea D. Semmens billed Medicare for 425 services in 2024
CMS data shows 425 Medicare services from Dr. Semmens across 13 procedure codes in 2024, for 104 Medicare patients. Medicare paid $72,368 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Semmens' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 02024: 188
- Office and hospital visits
- 2023: 112024: 1491255%
- Imaging
- 2023: 122024: 88633%
Dr. Semmens compared with the South Dakota median for general surgeons, 2024
- Dr. Semmens
- South Dakota median
- Medicare services
- 425vs 1782.4 times
- Medicare patients
- 104vs 16236% below
- Part D claims
- 67vs 3686% above
Medians across 105 general surgeons in South Dakota with Dmand AI profiles that report each measure.
Dr. Semmens' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Semmens?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Semmens and other general surgeons in South Dakota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ashlea D. Semmens treated 104 Medicare patients in 2024, average age 71
CMS counts 104 Medicare patients who saw Dr. Semmens in 2024. The largest group is 65 to 74, with 57 patients. 75% of them have cancer, and 66% have high blood pressure. 12% are also on Medicaid. Their average risk score is 0.84, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Semmens' median patient age at 73, with 100% women.
Dr. Semmens' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Semmens' Medicare patients, 2024
- Cancer75%
- High blood pressure66%
- High cholesterol63%
- Arthritis50%
- Anxiety30%
- Osteoporosis27%
- Diabetes19%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Semmens' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ashlea D. Semmens wrote 84 Medicare Part D claims in 2024
In 2024, Dr. Semmens wrote 84 Medicare Part D claims for 60 patients. 100% of them were for generic drugs. CMS names the drug for 67 of them, across 2 drugs with 11 or more claims each, at $87 in total drug cost. In 2021, CMS named 44 claims across 2 drugs.
Dr. Semmens' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Semmens' Part D claims, 2024
- Opioids81%68 of 84 claims
- Antibiotics14%12 of 84 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2021 to 2024
- 2021
- 2024
- Claims for drugs CMS names
- 2021: 442024: 6752%
Drugs named by CMS: 2 in 2024, 2 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ashlea D. Semmens ranks in the 97th percentile for mastectomy in Medicare
Dr. Semmens accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 68 procedures of mastectomy by Dr. Semmens, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Semmens ranks in Medicare procedure volume
- Mastectomy
- 97th percentile68 procedures
- Melanoma (skin cancer) excision
- 76th percentile23 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ashlea D. Semmens received $7,126 in industry payments from 2022 to 2025
CMS Open Payments shows 53 general payments to Dr. Semmens from 16 drug and device companies from 2022 to 2025. Travel and lodging make up the largest share, 45% of the total. Carl Zeiss Meditec USA, Inc. paid the most, $2,463.
General payments to Dr. Semmens by program year, 2022 to 2025
General payments to Dr. Semmens by kind, 2022 to 2025
- Travel and lodging$3,22145%
- Food and beverage$2,88540%
- Education$1,02014%
Companies that paid Dr. Semmens the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ashlea D. Semmens graduated from University of Washington School of Medicine
Dr. Semmens graduated from University of Washington School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ashlea D. Semmens's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ashlea D. Semmens
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ashlea D. Semmens' NPI number?
Dr. Ashlea D. Semmens' NPI number is 1023548633. It was assigned on June 15, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Ashlea D. Semmens?
Dr. Ashlea D. Semmens is a general surgeon in Rapid City, South Dakota. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Ashlea D. Semmens practice?
Dr. Semmens practices at 353 Fairmont Blvd, Rapid City, SD 57701. Dr. Semmens' primary practice is Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health. Dmand AI also links Dr. Semmens to 1 hospital.
What is Dr. Ashlea D. Semmens' office phone number?
The practice phone on file for Dr. Semmens is (605) 755-1000.
What is Dr. Ashlea D. Semmens' medical license number?
Dr. Semmens holds Iowa license R-11004.
Which hospitals is Dr. Ashlea D. Semmens affiliated with?
Dr. Semmens practices at Monument Health Rapid City Hospital in Rapid City, South Dakota. Dr. Semmens is also affiliated with Same Day Surgery Center. Dmand AI links Dr. Semmens to 1 more hospital.
What medical group is Dr. Ashlea D. Semmens part of?
Dr. Semmens is linked to Monument Health Rapid City Hospital.
Does Dr. Ashlea D. Semmens accept Medicare?
Yes. CMS data shows Dr. Semmens billed Medicare for 425 services in 2024, and Dr. Semmens accepts Medicare assignment.
How many Medicare patients does Dr. Ashlea D. Semmens see?
CMS counts 104 Medicare patients who saw Dr. Semmens in 2024, with an average age of 71.
What services does Dr. Ashlea D. Semmens bill to Medicare?
In 2024, Dr. Semmens' most billed Medicare services were office visit, new patient (99205), diagnostic imaging (76098) and surgery: skin and soft tissue (19301).
Show 4 more questionsShow fewer questions
Where did Dr. Ashlea D. Semmens go to medical school?
Dr. Semmens graduated from University of Washington School of Medicine in 2017.
What drugs does Dr. Ashlea D. Semmens prescribe most?
In 2024 Medicare Part D data, Dr. Semmens' most prescribed drugs by claims were Tramadol HCl and Oxycodone HCl.
Has Dr. Ashlea D. Semmens received payments from drug or device companies?
CMS Open Payments shows $7,126 in general payments to Dr. Semmens from 16 companies from 2022 to 2025. The largest total came from Carl Zeiss Meditec USA, Inc.
How long has Dr. Ashlea D. Semmens been practicing?
Dr. Semmens graduated from medical school in 2017, 9 years ago.
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