Aaron Zirk, D.O.
NPI 1386917268 · Emergency Medicine Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Osteopathic Manipulative Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Zirk, D.O. is a Emergency Medicine Physician provider in Naperville, IL (NPI 1386917268).
Provider details
- NPI number
- 1386917268
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036.136027 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
729 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 | 365 | $122 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 289 | $177 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 59 | $72 |
| Critical Care, First 30-74 Minutes99291 | 16 | $213 |
Typical Medicare-allowed amounts for these services range $72–$213 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 47 | 45 |
| Prednisone | 38 | 37 |
| Ondansetronbrand: Ondansetron Odt | 30 | 28 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 27 | 27 |
| Tramadol Hcl | 25 | 24 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 | 21 |
| Meclizine Hcl |
Practice location
Mailing address
Additional practice locations (2)
- 1000 Health Center DrMattoon, IL 61938-9261Phone: (217) 258-2551Fax: (217) 258-2256
- 1041 Royal Saint George DrNaperville, IL 60563-2322Phone: (773) 791-2478
Registry dates
- Enumerated
- 2012-02-22
- Last updated
- 2024-07-19
- Certified
- 2024-07-19
Frequently asked questions
- What is Aaron Zirk's NPI number?
- Aaron Zirk's National Provider Identifier (NPI) is 1386917268, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Zirk's specialty?
- Aaron Zirk is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Zirk located?
- Aaron Zirk's practice location on file with NPPES is 1041 Royal Saint George Dr, Naperville, IL 60563-2322.
- What is Aaron Zirk's phone number?
- The practice phone number listed in the NPPES registry for Aaron Zirk is (773) 791-2478.
- Does Aaron Zirk accept Medicare?
- Aaron Zirk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Zirk's NPI active?
- Yes — Aaron Zirk's NPI (1386917268) is active in the NPPES registry as of the last update on 2024-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.