Doctor profile · Federal record
Dr. Mark Monahan, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Emergency Medicine Physician · Dixon, IL
- NPI 1518998327
- Accepts Medicare
- 26 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
403 E 1St St
Dixon, IL 610213116
(815) 288-5531
fax (815) 285-5558 - Additional location
-
615 N Michigan St
South Bend, IN 466011033
(574) 647-7459
fax (574) 284-3342
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- August 5, 2025
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- Illinois #036107925 · Indiana #01057437A
- Medicaid (2)
- MI #4782693 · IN #200432460
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1518998327. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
514
Distinct HCPCS
5
Medicare allowed
$62,467
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 192 | 186 | $117 | |
99285 |
Emergency department visit with high level of medical decision making | 141 | 138 | $169 | |
99283 |
Emergency department visit with low level of medical decision making | 93 | 92 | $71 | |
99291 |
Critical care, first 30-74 minutes | 45 | 43 | $205 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 43 | 42 | $8 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 77. This provider delivers 6.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
228
Patients
225
Total drug cost
$1,071
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Naproxen | Generic | 56 | 56 | $124 |
| Prednisone | Generic | 38 | 37 | $119 |
| Ondansetron Odt (Ondansetron) | Brand | 33 | 33 | $168 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 27 | 26 | $114 |
| Cephalexin | Generic | 26 | 25 | $286 |
| Cyclobenzaprine Hcl | Generic | 19 | 19 | $54 |
| Azithromycin | Generic | 17 | 17 | $140 |
| Levofloxacin | Generic | 12 | 12 | $65 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Monahan's medical specialty?
Dr. Mark Monahan practices Emergency Medicine Physician in Dixon, IL.
Where does Dr. Mark Monahan practice?
Dr. Mark Monahan practices at 403 E 1St St, Dixon, IL 610213116. Office phone: 8152885531.
What is Dr. Mark Monahan's NPI?
Dr. Mark Monahan's National Provider Identifier (NPI) is 1518998327, issued by NPPES.
Does Dr. Mark Monahan accept Medicare assignment?
Yes. Dr. Mark Monahan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Monahan commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with low level of medical decision making (HCPCS 99283). Source: CMS Medicare Physician & Other Practitioners file.