Doctor profile · Federal record
Dr. John Demask, D.O.
Family Medicine Physician (CMS: Family Practice) · Minooka, IL
- NPI 1174501134
- Accepts Medicare
- 33 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
201 S Wabena Ave
Minooka, IL 604478723
(815) 467-1518
fax (815) 467-7419
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Illinois #036094869
- Medicaid
- IL #036094869-1
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1174501134. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
768
Distinct HCPCS
6
Medicare allowed
$72,804
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 429 | 222 | $127 | |
36415 |
Insertion of needle into vein for collection of blood sample | 204 | 135 | $8 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 79 | 79 | $129 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 31 | 28 | $90 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 13 | 13 | $115 | |
G0402 |
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment | 12 | 12 | $163 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 122. This provider delivers 6.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,944
Patients
374
Total drug cost
$17,980
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 252 | 53 | $1,761 |
| Atorvastatin Calcium | Generic | 189 | 39 | $1,804 |
| Lisinopril | Generic | 168 | 30 | $912 |
| Metformin Hcl | Generic | 166 | 34 | $1,176 |
| Levothyroxine Sodium | Generic | 152 | 27 | $1,338 |
| Hydrochlorothiazide | Generic | 146 | 30 | $491 |
| Losartan Potassium | Generic | 135 | 27 | $1,397 |
| Rosuvastatin Calcium | Generic | 115 | 19 | $1,142 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 111 | 24 | $3,188 |
| Amlodipine Besylate-Benazepril (Amlodipine Besylate/Benazepril) | Brand | 106 | 18 | $1,191 |
Frequently asked questions
What is Dr. John Demask's medical specialty?
Dr. John Demask practices Family Medicine Physician in Minooka, IL.
Where does Dr. John Demask practice?
Dr. John Demask practices at 201 S Wabena Ave, Minooka, IL 604478723. Office phone: 8154671518.
What is Dr. John Demask's NPI?
Dr. John Demask's National Provider Identifier (NPI) is 1174501134, issued by NPPES.
Does Dr. John Demask accept Medicare assignment?
Yes. Dr. John Demask accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Demask commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.