Doctor profile · Federal record
Dr. Nickolas Demark, DO
Hospice and Palliative Medicine (Internal Medicine) Physician (CMS: Internal Medicine) · Internal Medicine Physician · Hospitalist Physician · Internal Medicine Physician · Oskaloosa, IA
- NPI 1114214004
- Accepts Medicare
- MIPS 92.6 / 100 · 2023
- 15 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 6 locations .
- Primary practice
-
1229 C Ave E
Oskaloosa, IA 525774298
(641) 672-3100 - Additional location
-
130 2Nd St
Neenah, WI 549562883
(920) 729-2738
fax (920) 729-3021 - Additional location
-
1715 Dousman St
Green Bay, WI 543033211
(920) 496-4700 - Additional location
-
1726 Shawano Ave
Green Bay, WI 543033216
(920) 496-4700 - Additional location
-
1818 N Meade St
Appleton, WI 549113454
(920) 735-7645
fax (920) 735-7618 - Additional location
-
900 Illinois Ave
Stevens Point, WI 544813114
(715) 346-5000
Show 3 more locations
Credentials & registration
- NPI registered
- June 2011 — 15 yrs on file
- Profile last updated
- September 11, 2025
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207RH0002X — NUCC code
- State licenses (3)
- Iowa #DO-06639 · Michigan #5101019580 · Wisconsin #62482
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1114214004. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
296
Distinct HCPCS
6
Medicare allowed
$25,797
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 183 | 61 | $73 | |
99239 |
Hospital discharge day management, more than 30 minutes | 30 | 30 | $109 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 27 | 27 | $165 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 26 | 26 | $124 | |
99238 |
Hospital discharge day management, 30 minutes or less | 16 | 16 | $77 | |
93016 |
Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 14 | 14 | $19 |
In context: peer comparison
Among 1 peers in Oskaloosa Hospice and Palliative Medicine (Internal Medicine) Physician, average services per provider: 49. This provider delivers 6.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
160
Patients
35
Total drug cost
$7,163
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 24 | 0 | $325 |
| Furosemide | Generic | 16 | 11 | $59 |
| Pantoprazole Sodium | Generic | 16 | 13 | $326 |
| Latanoprost | Generic | 15 | 0 | $672 |
| Levothyroxine Sodium | Generic | 15 | 0 | $237 |
| Clopidogrel (Clopidogrel Bisulfate) | Brand | 14 | 0 | $182 |
| Eliquis (Apixaban) | Brand | 14 | 0 | $3,839 |
| Budesonide | Generic | 13 | 0 | $944 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 11 | 0 | $415 |
| Metoprolol Succinate | Generic | 11 | 0 | $126 |
Frequently asked questions
What is Dr. Nickolas Demark's medical specialty?
Dr. Nickolas Demark practices Hospice and Palliative Medicine (Internal Medicine) Physician in Oskaloosa, IA.
Where does Dr. Nickolas Demark practice?
Dr. Nickolas Demark practices at 1229 C Ave E, Oskaloosa, IA 525774298. Office phone: 6416723100.
What is Dr. Nickolas Demark's NPI?
Dr. Nickolas Demark's National Provider Identifier (NPI) is 1114214004, issued by NPPES.
Does Dr. Nickolas Demark accept Medicare assignment?
Yes. Dr. Nickolas Demark accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nickolas Demark commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.