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

Dr. Howard Mark Hack, MD

Individual provider Gastroenterology Physician · NPI 1952483786

Dr. Howard Mark Hack, MD practises Gastroenterology in Grand Forks, North Dakota. Graduated from Washington University School of Medicine in 1988, 38 years ago. Practices with Arkansas Health Group, a 645-clinician group and accepts Medicare assignment. Licensed in North Dakota and Wisconsin.

Years since qualifying
38
Trained at
Washington University School of Medicine
Licensed in
ND, WI
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.

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Practice location Address checks out

1300 S Columbia Rd
Grand Forks, ND 58201-4012
Phone: (701) 780-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 13875 (ND)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 30900 (WI)

Record details

NPI number1952483786
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 20, 2006
Last updated in NPPESMay 5, 2017

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Arkansas Health Group — 645 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Food and Beverage $116 1 payment · 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.

Colleagues at Arkansas Health Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 645 clinicians in the practice; 12 are shown here.

Other providers in Grand Forks