John Pacini, DO
NPI 1134232309 · Emergency Medicine Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Pacini, DO is a Emergency Medicine Physician provider in Mchenry, IL (NPI 1134232309).
Provider details
- NPI number
- 1134232309
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036098116 (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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
715 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 High Level of Medical Decision Making99285 | 282 | $177 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 249 | $122 |
| Critical Care, First 30-74 Minutes99291 | 62 | $211 |
| Critical Care, Each Additional 30 Minutes99292 | 59 | $107 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 22 | $72 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 19 | $172 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 101 | 90 |
| Cefadroxil | 96 | 94 |
| Prednisone | 89 | 82 |
| Ondansetronbrand: Ondansetron Odt | 79 | 75 |
| Methylprednisolone | 61 | 59 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 56 | 56 |
| Nitrofurantoin Monohyd/M-Cryst |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-15
- Last updated
- 2017-08-08
Frequently asked questions
- What is John Pacini's NPI number?
- John Pacini's National Provider Identifier (NPI) is 1134232309, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Pacini's specialty?
- John Pacini is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Pacini located?
- John Pacini's practice location on file with NPPES is 4201 W Medical Center Dr, Mchenry, IL 60050-8409.
- What is John Pacini's phone number?
- The practice phone number listed in the NPPES registry for John Pacini is (815) 759-3100.
- Does John Pacini accept Medicare?
- John Pacini is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Pacini's NPI active?
- Yes — John Pacini's NPI (1134232309) is active in the NPPES registry as of the last update on 2017-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.