Derek K. Groeneweg, PA
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 177
- Hospital affiliations
- 3
- Industry payments
- $70
- Medical groups
- 2
- Practice address
- 300 South Bruce Street, Marshall, MN 56258
- Practice phone
- Call (507) 537-9661
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Derek Groeneweg's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Derek K. Groeneweg is a surgical physician assistant in Marshall, Minnesota
Derek Groeneweg practices at Avera Marshall Regional Medical Center in Marshall, Minnesota, part of Avera Health.
Derek Groeneweg's NPI, 1255888772, was assigned on September 1, 2016. Derek Groeneweg holds Minnesota license 2598.
- NPI
- 1255888772NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729366752
- NPI enumeration date
- September 1, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (507) 537-9661
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Derek K. Groeneweg practices at Avera Marshall Regional Medical Center in Marshall, Minnesota
Derek Groeneweg's primary practice is Avera Marshall Regional Medical Center, at 300 South Bruce Street, Marshall, MN 56258 in Lyon County. The practice phone is (507) 537-9661.
- Avera Marshall Regional Medical Center300 South Bruce Street, Marshall, MN 56258 · Lyon CountyPhone(507) 537-9661
Source: Dmand AI Affiliation Data
Derek K. Groeneweg is affiliated with 6 sites of care and 2 medical groups
Derek Groeneweg's primary practice is Avera Marshall Regional Medical Center in Marshall, Minnesota, part of Avera Health. Derek Groeneweg is also affiliated with Avera Granite Falls Health Center. The medical group on file is Avera Marshall Regional Medical Center. Dmand AI also links Derek Groeneweg to 1 more hospital, 1 breast imaging center, 1 home health agency, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Derek K. Groeneweg's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Derek Groeneweg practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Avera Marshall Regional Medical Center | Available with a free account |
| +5 more sites and 1 medical group | 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 Avera Health and 6.2K+ hospitals, with verified contacts in the same login.
Derek K. Groeneweg is one of 172 surgical physician assistants in Minnesota
Surgical is Derek Groeneweg's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. Derek Groeneweg is licensed in Minnesota.
Specialties and state licenses
- Surgical physician assistant, MinnesotaPrimary
Surgical physician assistants near Derek Groeneweg
Counts of surgical physician assistants 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
Derek K. Groeneweg treated 22 Medicare patients in 2024, average age 76
CMS counts 22 Medicare patients who saw Derek Groeneweg in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.58, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Derek Groeneweg's median patient age at 58, with 55% women.
Derek Groeneweg's Medicare patients by sex, 2024
- Women1150%
- Men1150%
Chronic conditions among Derek Groeneweg's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis73%
- Diabetes55%
- Anxiety50%
- Mood disorders50%
Share of Medicare patients with each condition. A patient can have several.
Derek Groeneweg's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Derek K. Groeneweg wrote 177 Medicare Part D claims in 2024
In 2024, Derek Groeneweg wrote 177 Medicare Part D claims for 95 patients. 99% of them were for generic drugs.
Derek Groeneweg's Part D claims by kind of drug, 2024
- Generic175 claims99%
- Brand-name and other2 claims1%
Drug classes CMS tracks in Derek Groeneweg's Part D claims, 2024
- Opioids41%73 of 177 claims
- Antibiotics14%25 of 177 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Derek K. Groeneweg takes part in Medicare
Derek Groeneweg accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Derek K. Groeneweg received $70 in industry payments in 2025
CMS Open Payments shows 2 general payments to Derek Groeneweg from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $54.
Companies that paid Derek Groeneweg the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Derek K. Groeneweg'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 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 (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Derek K. Groeneweg
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Derek K. Groeneweg's NPI number?
Derek K. Groeneweg's NPI number is 1255888772. It was assigned on September 1, 2016, and it is active in the NPI Registry.
What does Derek K. Groeneweg specialize in?
Derek K. Groeneweg is a surgical physician assistant in Marshall, Minnesota. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does Derek K. Groeneweg practice?
Derek Groeneweg practices at 300 South Bruce Street, Marshall, MN 56258. Derek Groeneweg's primary practice is Avera Marshall Regional Medical Center in Marshall, Minnesota, part of Avera Health. Dmand AI also links Derek Groeneweg to 1 hospital, 1 breast imaging center, 1 home health agency, 1 hospice and 1 medical group.
What is Derek K. Groeneweg's office phone number?
The practice phone on file for Derek Groeneweg is (507) 537-9661.
What is Derek K. Groeneweg's medical license number?
Derek Groeneweg holds Minnesota license 2598.
Which hospitals is Derek K. Groeneweg affiliated with?
Derek Groeneweg practices at Avera Marshall Regional Medical Center in Marshall, Minnesota. Derek Groeneweg is also affiliated with Avera Granite Falls Health Center. Dmand AI links Derek Groeneweg to 1 more hospital.
What medical group is Derek K. Groeneweg part of?
Derek Groeneweg is linked to Avera Marshall Regional Medical Center. Dmand AI links Derek Groeneweg to 1 more medical group.
Does Derek K. Groeneweg accept Medicare?
Yes. CMS lists Derek Groeneweg as accepting Medicare assignment.
How many Medicare patients does Derek K. Groeneweg see?
CMS counts 22 Medicare patients who saw Derek Groeneweg in 2024, with an average age of 76.
Has Derek K. Groeneweg received payments from drug or device companies?
CMS Open Payments shows $70 in general payments to Derek Groeneweg from 2 companies from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Derek K. Groeneweg been practicing?
Derek Groeneweg graduated from medical school in 2016, 10 years ago.
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