Nickolas DemarkDO
Internal Medicine, Hospice and Palliative Medicine
2027 Medicare Advantage
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Medicare Advantage plans for Mahaska County, IA, Portage County, WI and Winnebago County, WI.
Use the name or plan ID on your member card, or choose your insurance company.
Directory results See what each insurance company reports
Listed on 8 plans so far
Some of Aetna Medicare, Humana, Devoted, Group Health Cooperative of Eau Claire, HealthPartners, MediGold, Molina Healthcare of Iowa, Inc., Network Health Medicare Advantage Plans, Security Health Plan of Wisconsin, Inc., UnitedHealthcare, Wellcare and Wellpoint's 2027 plans in Mahaska County, IA, Portage County, WI and Winnebago County, WI haven't been checked yet.
The 85 Medicare Advantage plans we show for Mahaska County, IA, Portage County, WI and Winnebago County, WI in 2027
- 8 list Nickolas
- 17 not listed
- 60 not checked yet
Aetna Medicare
4 plans list Nickolas.
Aetna Medicare Eagle (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 630 N 12th St, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Value Care (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 630 N 12th St, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Enhanced Classic Extra (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 630 N 12th St, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$75a monthAetna Medicare Enhanced Extra (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 630 N 12th St, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$75a month
4 more Aetna Medicare plans haven't been checked yet.
Humana
4 plans list Nickolas.
Humana Gold Plus H0028-053 (HMO)
Source: Humana provider directory.
Listed offices for this plan:
- 1229 C Ave E, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$0a monthHumana USAA Honor Giveback (PPO)
Source: Humana provider directory.
Listed offices for this plan:
- 1229 C Ave E, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$0a monthHumanaChoice Giveback H5216-340 (PPO)
Source: Humana provider directory.
Listed offices for this plan:
- 1229 C Ave E, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$0a monthHumanaChoice H5216-014 (PPO)
Source: Humana provider directory.
Listed offices for this plan:
- 1229 C Ave E, Oskaloosa, IA, 52577
This result applies to these offices. Other locations are not confirmed.
$51a month
16 more Humana plans haven't been checked yet.
Devoted
Not listed on its 5 plans here. That isn't proof they're out of network.
Group Health Cooperative of Eau Claire
Not checked yet.
HealthPartners
Not checked yet.
MediGold
Not listed on its 5 plans here. That isn't proof they're out of network.
Molina Healthcare of Iowa, Inc. · Molina Healthcare of Wisconsin
Not checked yet.
2 more Molina Healthcare of Iowa, Inc. plans haven't been checked yet.
Network Health Medicare Advantage Plans
Not checked yet.
Security Health Plan of Wisconsin, Inc.
Not checked yet.
UnitedHealthcare
Not checked yet.
14 more UnitedHealthcare plans haven't been checked yet.
Wellcare
Not checked yet.
3 more Wellcare plans haven't been checked yet.
Wellpoint · Anthem Blue Cross and Blue Shield
Not checked yet.
5 more Wellpoint plans haven't been checked yet.
Premiums are each plan's own monthly premium, as filed with Medicare. You keep paying your Medicare Part B premium.
Can't find your plan?Tell us the plan you have, and a licensed Silverpath advisor will check whether Nickolas takes it. Free.
Original Medicare
Original Medicare status
Most Medicare Supplement (Medigap) policies have no provider network: they help pay Original Medicare's cost sharing where Medicare is accepted. Medicare SELECT policies can require network providers for full benefits. Ask the office whether they accept Medicare.
Medicare enrollment and assignment have not been verified here. Advantage directory results do not answer this question.
No opt-out record in this CMS file. CMS's file covers data through 2026-08-31. This does not establish Medicare enrollment, assignment, or whether the office accepts new Medicare patients.
CMS opt-out source · Data through 2026-08-31 · Reviewed Oct 22, 2026
Where they practice
6 practice locations
- NPI issued
- 2011
- Registry record updated
- Jul 1, 2026
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Which 2027 Medicare Advantage plans list Nickolas Demark?
In Mahaska County, IA, Portage County, WI and Winnebago County, WI, 8 Medicare Advantage plans for 2027 list Nickolas in provider data from Medicare.gov or the carrier, including Aetna Medicare Eagle (HMO-POS), Aetna Medicare Value Care (HMO-POS) and Aetna Medicare Enhanced Classic Extra (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Networks can change during the year, so confirm with the office or the plan before you enroll.
Where does Nickolas Demark practice?
6 locations, including 1229 C Ave E, Oskaloosa, IA. All of them are listed on this page.
How do I confirm Nickolas is in my plan's network?
Call the member services number on your plan card and give them the NPI 1114214004, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
Patients can use Silverpath to find practices and check plan networks in Mahaska County, IA, Portage County, WI and Winnebago County, WI. Tell us which plans you take, or want to take, and we'll keep this page accurate and talk with you about reaching more Medicare patients and carriers.