Dr. Hendrik B. Klopper, MD
- Medicare services, 2024
- 464
- Medicare patients, 2024
- 289
- Part D claims, 2024
- 136
- Publications
- 1
- Hospital affiliations
- 5
- Practice address
- 575 Sioux Point Rd, North Sioux City, SD 57049
- Practice phone
- Call (605) 217-2667
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cnos
North Sioux City, South Dakota
Find Dr. Klopper'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.
Dr. Hendrik B. Klopper is a neurosurgeon in North Sioux City, South Dakota
Dr. Klopper practices at Cnos in North Sioux City, South Dakota.
Dr. Klopper's NPI, 1942429394, was assigned on April 24, 2007. Dr. Klopper graduated from Sanford School of Medicine of University of South Dakota in 2005. Dr. Klopper holds South Dakota license 8072.
- NPI
- 1942429394NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183894694
- NPI enumeration date
- April 24, 2007
- NPI status
- Active
- Practice phone
- (605) 217-2667
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Hendrik B. Klopper practices at Cnos in North Sioux City, South Dakota
Dr. Klopper's primary practice is Cnos, at 575 Sioux Point Rd, North Sioux City, SD 57049 in Union County. The practice phone is (605) 217-2667.
- Cnos575 Sioux Point Rd, North Sioux City, SD 57049 · Union CountyPhone(605) 217-2667
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Hendrik B. Klopper is affiliated with 9 sites of care and 5 medical groups
Dr. Klopper's primary practice is Cnos in North Sioux City, South Dakota. Dr. Klopper is also affiliated with UnityPoint Health - St. Luke's. The medical group on file is CNOS. Dmand AI also links Dr. Klopper to 4 more hospitals, 4 medical groups and 3 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Hendrik B. Klopper's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klopper practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cnos | Available with a free account |
| +8 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hendrik B. Klopper is one of 30 neurosurgeons in South Dakota
Neurological surgery is Dr. Klopper's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dmand AI has Dr. Klopper's licenses on file in 3 states: South Dakota, Iowa and Nebraska.
Specialties and state licenses
- Neurological surgery, South DakotaPrimary
- Iowa license
- Nebraska license
Neurosurgeons near Dr. Klopper
Counts of neurosurgeons 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. Hendrik B. Klopper billed Medicare for 464 services in 2024
CMS data shows 464 Medicare services from Dr. Klopper across 12 procedure codes in 2024, for 289 Medicare patients. Medicare paid $61,489 for them.
Dr. Klopper's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4032024: 36310%
- Surgery
- 2023: 1252024: 8830%
- Imaging
- 2023: 02024: 13
Where Dr. Klopper's Medicare services took place, 2024
- In an office35075%
- In a facility11425%
Dr. Klopper compared with the South Dakota median for neurosurgeons, 2024
- Dr. Klopper
- South Dakota median
- Medicare services
- 464vs 1223.8 times
- Medicare patients
- 289vs 992.9 times
- Part D claims
- 104vs 392.7 times
Medians across 27 neurosurgeons in South Dakota with Dmand AI profiles that report each measure.
Dr. Klopper's 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. Klopper?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klopper and other neurosurgeons in South Dakota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hendrik B. Klopper treated 289 Medicare patients in 2024, average age 73
CMS counts 289 Medicare patients who saw Dr. Klopper in 2024. The largest group is 65 to 74, with 155 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Klopper's median patient age at 66, with 52% women.
Dr. Klopper's Medicare patients by age, 2024
Dr. Klopper's Medicare patients by sex, 2024
- Women15453%
- Men13547%
Chronic conditions among Dr. Klopper's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Arthritis71%
- Diabetes31%
- Mood disorders30%
- Anxiety28%
- Depression28%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Klopper's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hendrik B. Klopper wrote 136 Medicare Part D claims in 2024
In 2024, Dr. Klopper wrote 136 Medicare Part D claims for 76 patients. 100% of them were for generic drugs. CMS names the drug for 104 of them, across 5 drugs with 11 or more claims each, at $946 in total drug cost. In 2023, CMS named 40 claims across 3 drugs.
Dr. Klopper's 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. Klopper's Part D claims, 2024
- Opioids35%47 of 136 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 402024: 104160%
Drugs named by CMS: 5 in 2024, 3 in 2023.
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. Hendrik B. Klopper ranks in the 78th percentile for laminectomy or laminotomy (partial removal of spine bones) in Medicare
CMS counts 51 procedures of laminectomy or laminotomy (partial removal of spine bones) by Dr. Klopper, more than 78% of the clinicians it reports for that procedure.
Where Dr. Klopper ranks in Medicare procedure volume
- Spinal fusion
- 75th percentile107 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 78th percentile51 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Source: Doctors and Clinicians Utilization Data (CMS)
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Dr. Hendrik B. Klopper has 1 publication on record
Dmand AI links 1 paper to Dr. Klopper in 2013. Dr. Klopper's most frequent co-authors are Stephen E. Doran, MD and Andrew Patrick Gard, MD.
Dr. Klopper's most frequent co-authors
Recent publications by Dr. Klopper
See who Dr. Klopper researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Klopper works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Hendrik B. Klopper received $5,238 in industry payments from 2017 to 2025
CMS Open Payments shows 41 general payments to Dr. Klopper from 9 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 58% of the total. Stryker Corporation paid the most, $2,327.
General payments to Dr. Klopper by program year, 2017 to 2025
General payments to Dr. Klopper by kind, 2017 to 2025
- Travel and lodging$3,04858%
- Food and beverage$2,19042%
Companies that paid Dr. Klopper the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hendrik B. Klopper graduated from Sanford School of Medicine of University of South Dakota
Dr. Klopper graduated from Sanford School of Medicine of University of South Dakota in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Hendrik B. Klopper'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Hendrik B. Klopper
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. Hendrik B. Klopper's NPI number?
Dr. Hendrik B. Klopper's NPI number is 1942429394. It was assigned on April 24, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Hendrik B. Klopper?
Dr. Hendrik B. Klopper is a neurosurgeon in North Sioux City, South Dakota. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Hendrik B. Klopper practice?
Dr. Klopper practices at 575 Sioux Point Rd, North Sioux City, SD 57049. Dr. Klopper's primary practice is Cnos in North Sioux City, South Dakota. Dmand AI also links Dr. Klopper to 4 hospitals, 4 medical groups and 3 group practices and clinics.
What is Dr. Hendrik B. Klopper's office phone number?
The practice phone on file for Dr. Klopper is (605) 217-2667.
What is Dr. Hendrik B. Klopper's medical license number?
Dr. Klopper holds South Dakota license 8072, one of the licenses on file in 3 states.
Which states has Dr. Hendrik B. Klopper been licensed in?
Dmand AI has state licenses on file for Dr. Klopper in South Dakota, Iowa and Nebraska.
Which hospitals is Dr. Hendrik B. Klopper affiliated with?
Dr. Klopper is affiliated with UnityPoint Health - St. Luke's. Dmand AI links Dr. Klopper to 4 more hospitals.
What medical group is Dr. Hendrik B. Klopper part of?
Dr. Klopper is linked to CNOS. Dmand AI links Dr. Klopper to 4 more medical groups.
Does Dr. Hendrik B. Klopper accept Medicare?
Yes. CMS data shows Dr. Klopper billed Medicare for 464 services in 2024.
How many Medicare patients does Dr. Hendrik B. Klopper see?
CMS counts 289 Medicare patients who saw Dr. Klopper in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
What services does Dr. Hendrik B. Klopper bill to Medicare?
In 2024, Dr. Klopper's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99203) and office visit, established patient (99214).
Where did Dr. Hendrik B. Klopper go to medical school?
Dr. Klopper graduated from Sanford School of Medicine of University of South Dakota in 2005.
What drugs does Dr. Hendrik B. Klopper prescribe most?
In 2024 Medicare Part D data, Dr. Klopper's most prescribed drugs by claims were Gabapentin, Hydrocodone-Acetaminophen and Levetiracetam.
Has Dr. Hendrik B. Klopper received payments from drug or device companies?
CMS Open Payments shows $5,238 in general payments to Dr. Klopper from 9 companies from 2017 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Hendrik B. Klopper been practicing?
Dr. Klopper graduated from medical school in 2005, 21 years ago.
Does Dr. Hendrik B. Klopper do research?
Dmand AI links 1 publication to Dr. Klopper.
Who does Dr. Hendrik B. Klopper publish with?
Dr. Klopper's most frequent co-authors are Stephen E. Doran, MD (1 shared paper) and Andrew Patrick Gard, MD (1 shared paper).
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