Mark Monahan, M.D.
NPI 1518998327 · Emergency Medicine Physician · Dixon, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Monahan, M.D. is a Emergency Medicine Physician provider in Dixon, IL (NPI 1518998327).
Provider details
- NPI number
- 1518998327
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01057437A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
531 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 209 | $117 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 118 | $166 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 108 | $70 |
| Critical Care, First 30-74 Minutes99291 | 54 | $202 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 42 | $8 |
Typical Medicare-allowed amounts for these services range $8–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Naproxen | 57 | 55 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 40 | 40 |
| Prednisone | 31 | 29 |
| Cephalexin | 30 | 30 |
| Ondansetronbrand: Ondansetron Odt | 28 | 28 |
| Cyclobenzaprine Hcl | 24 | 22 |
| Azithromycin | 15 | 13 |
Practice location
Mailing address
Additional practice locations (1)
- 615 N Michigan StSouth Bend, IN 46601-1033Phone: (574) 647-7459Fax: (574) 284-3342
Registry dates
- Enumerated
- 2006-07-06
- Last updated
- 2025-08-05
- Certified
- 2025-08-05
Frequently asked questions
- What is Mark Monahan's NPI number?
- Mark Monahan's National Provider Identifier (NPI) is 1518998327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Monahan's specialty?
- Mark Monahan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Monahan located?
- Mark Monahan's practice location on file with NPPES is 403 E 1st St, Dixon, IL 61021-3116.
- What is Mark Monahan's phone number?
- The practice phone number listed in the NPPES registry for Mark Monahan is (815) 288-5531.
- Does Mark Monahan accept Medicare?
- Mark Monahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Monahan's NPI active?
- Yes — Mark Monahan's NPI (1518998327) is active in the NPPES registry as of the last update on 2025-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.