Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Jon Mark Grudem, MD

Individual provider Neurology Physician · NPI 1477649531

Dr. Jon Mark Grudem, MD practises Neurology in North Sioux City, South Dakota. Graduated from Oregon Health Sciences University School of Medicine in 2004, 22 years ago. Practices with Cnos PC, a 98-clinician group. Licensed in Iowa and South Dakota.

Years since qualifying
22
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
IA, SD
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

575 N Sioux Point Rd
North Sioux City, SD 57049-5312 Not confirmed with CMS for 15 years — call before visiting
Phone: (605) 217-2667
Fax: (605) 217-2900
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 7354 (SD)
Neurology Physician Taxonomy 2084N0400X · Licence 38576 (IA)

Record details

NPI number1477649531
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESJanuary 13, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROLOGY
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Cnos Pc — 98 clinicians
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 22 times · 64th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients338
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $29,044 11 payments
Travel and Lodging $3,250 7 payments · travel or lodging paid or reimbursed, such as to attend a conference
Consulting Fee $1,525 1 payment
Food and Beverage $1,104 61 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Pocahontas Community Hospital Hospital · Pocahontas, IA
  • Sioux Center Health Hospital · Sioux Center, IA
  • Cherokee Regional Medical Center Hospital · Cherokee, IA
  • Orange City Area Health System Hospital · Orange City, IA
  • St Lukes Regional Medical Center Hospital · Sioux City, IA

Colleagues at Cnos PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 98 clinicians in the practice; 12 are shown here.