Nickolas S Demark, DO in Oskaloosa, IA - Medicare Internal Medicine

Nickolas S Demark, DO is a medicare enrolled "Internal Medicine - Hospice And Palliative Medicine" physician in Oskaloosa, Iowa. He went to Des Moines University Of Osteopathic Medicine And Health Sciences and graduated in 2011 and has 15 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Mahaska County Hospital and his current practice location is 1229 C Ave E, Oskaloosa, Iowa. You can reach out to his office (for appointments etc.) via phone at (641) 672-3100.

Nickolas S Demark is licensed to practice in Iowa (license number DO-06639) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1114214004.

Contact Information

	Nickolas S Demark, DO
	1229 C Ave E, Oskaloosa, IA 52577-4246
	(641) 672-3100
	(641) 672-3381

Map and Direction

Physician's Profile

Full Name	Nickolas S Demark
Gender	Male
Speciality	Internal Medicine
Experience	15 Years
Location	1229 C Ave E, Oskaloosa, Iowa
Accepts Medicare Assignments	Yes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Nickolas S Demark attended and graduated from Des Moines University Of Osteopathic Medicine And Health Sciences in 2011

NPI Data:

NPI Number: 1114214004
Provider Enumeration Date: 06/30/2011
Last Update Date: 07/01/2026

Medicare PECOS Information:

PECOS PAC ID: 4880825363
Enrollment ID: I20251022002524

Medical Identifiers

Medical identifiers for Nickolas S Demark such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1114214004	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
208M00000X	Hospitalist	62482 (Wisconsin)	Secondary
207R00000X	Internal Medicine	62482 (Wisconsin)	Secondary
207R00000X	Internal Medicine	5101019580 (Michigan)	Secondary
207RH0002X	Internal Medicine - Hospice And Palliative Medicine	DO-06639 (Iowa)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Mahaska Health Partnership Hospice Services	Oskaloosa, IA	Hospice
Mahaska Health Partnership	Oskaloosa, IA	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Mahaska County Hospital	2769388677	120

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Nickolas S Demark is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Nickolas S Demark, DO 1229 C Ave E, Oskaloosa, IA 52577-4298 Ph: (641) 672-3236	Nickolas S Demark, DO 1229 C Ave E, Oskaloosa, IA 52577-4246 Ph: (641) 672-3100

Reviews and Comments

Internal Medicine Doctors in Oskaloosa, IA

Karen Anne Spahr, DO Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1203 A Ave East, Oskaloosa, IA 52577 Phone: 641-672-9930 Fax: 641-672-9932
Kiron Viswambharan Nair, MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1229 C Ave E, Oskaloosa, IA 52577 Phone: 641-672-3236
Dr. Ronald Benjamin Collins Jr., M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1229 C Ave E, Oskaloosa, IA 52577 Phone: 641-672-3394
Kyle Ramsay Witt, MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 1229 C Ave E, Oskaloosa, IA 52577 Phone: 641-672-3100 Fax: 641-672-3259

Nickolas S Demark, DO - Medicare Internal Medicine in Oskaloosa, IA