Doctor profile · Federal record
Dr. Mark Demus, MD
Emergency Medicine Physician (CMS: Internal Medicine) · General Acute Care Hospital · General Acute Care Hospital · Hoffman Estates, IL
- NPI 1477571479
- Accepts Medicare
- MIPS 89.7 / 100 · 2023
- 45 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1555 Barrington RD
Hoffman Estates, IL 601691019
(847) 490-6930 - Additional location
-
21481 N Rand RD
Kildeer, IL 600473061
(847) 618-9500
fax (847) 618-9654 - Mailing address
-
21481 N Rand RD
Kildeer, IL 600473061
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 28, 2021
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- Illinois #036-065552 · Illinois #036065552
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1477571479. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
772
Distinct HCPCS
6
Medicare allowed
$112,191
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 302 | 295 | $191 | |
93042 |
Electrocardiogram (ecg) 1 to 3 leads with review by physician only | 120 | 119 | $7 | |
99284 |
Emergency department visit with moderate level of medical decision making | 118 | 116 | $131 | |
99291 |
Critical care, first 30-74 minutes | 110 | 109 | $229 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 65 | 63 | $96 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 57 | 57 | $120 |
In context: peer comparison
Among 3 peers in Hoffman Estates Emergency Medicine Physician, average services per provider: 116. This provider delivers 6.7× the peer median.Open Payments
Industry payments received
All-time total
$18
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Inari Medical, INC. | 1 | $18.39 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
211
Patients
208
Total drug cost
$1,770
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 36 | 35 | $161 |
| Tramadol Hcl | Generic | 30 | 30 | $72 |
| Methylprednisolone | Generic | 28 | 28 | $326 |
| Azithromycin | Generic | 26 | 25 | $141 |
| Cephalexin | Generic | 25 | 25 | $219 |
| Prednisone | Generic | 19 | 18 | $59 |
| Doxycycline Hyclate | Generic | 18 | 18 | $393 |
| Cefdinir | Generic | 16 | 16 | $354 |
| Meclizine Hcl | Generic | 13 | 13 | $45 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Demus's medical specialty?
Dr. Mark Demus practices Emergency Medicine Physician in Hoffman Estates, IL.
Where does Dr. Mark Demus practice?
Dr. Mark Demus practices at 1555 Barrington RD, Hoffman Estates, IL 601691019. Office phone: 8474906930.
What is Dr. Mark Demus's NPI?
Dr. Mark Demus's National Provider Identifier (NPI) is 1477571479, issued by NPPES.
Does Dr. Mark Demus accept Medicare assignment?
Yes. Dr. Mark Demus accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Demus commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Electrocardiogram (ecg) 1 to 3 leads with review by physician only (HCPCS 93042); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.