Dr. Troy B Shaffer , DO
Emergency Medicine • Mchenry, IL
Professional Overview & Biography Verified Profile Summary
Dr. Troy Shaffer, DO is a certified Emergency Medicine practicing in Mchenry, IL. With approximately 31 years of clinical experience since completing medical education in 1995, Dr. Shaffer delivers high-quality medical care to the local community at 4201 W MEDICAL CENTER DR.
Dr. Shaffer is affiliated with Rockford Health Physicians and accepts Medicare assignment.
Frequently performed procedures and clinical services include emergency department visit with moderate level of medical decision making, emergency department visit for life threatening or functioning severity, emergency department visit with low level of medical decision making. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
4201 W Medical Center Dr
Mchenry, IL 600508409
Medicare Profile & Education
Other
1995
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Emergency Medicine in Mchenry, IL
Practicing in Mchenry, IL (3389 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99284
Emergency department visit with moderate level of medical decision making
|
114 | 108 | $299.22 | $123.47 |
|
99285
Emergency department visit for life threatening or functioning severity
|
93 | 91 | $358.35 | $178.41 |
|
99283
Emergency department visit with low level of medical decision making
|
39 | 39 | $197.57 | $70.74 |
|
99213
Established patient office or other outpatient visit, typically 15 minutes
|
31 | 30 | $94.79 | $66.45 |
|
99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
20 | 20 | $121.17 | $85.21 |
|
99291
Critical care, first 30-74 minutes
|
20 | 20 | $558.21 | $215.06 |
Medical Specialties & State Licenses
CMS Verified: 2026-04-03NUCC Taxonomy Code: 207P00000X
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
NUCC Taxonomy Code: 207PE0004X
An emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Rockford Health Physicians
5970 Churchview Dr, Rockford, IL 611072574
Phone: 8159712000
Secondary Practice Locations
2400 N Rockton Ave, Er Dept
Rockford, IL 611033655
Phone: 8159715000
1045 W Stephenson St
Freeport, IL 610324864
Phone: 8155996000
8201 E Riverside Blvd
Rockford, IL 611142300
Phone: 8159713333
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Nurse Practitioner
Certified Nurse Practitioner
Hospitalist
Doctor of Medicine (M.D.)
Social Worker - Clinical
Master of Social Work, Licensed Clinical Social Worker
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Psychiatry & Neurology - Psychiatry
Doctor of Osteopathic Medicine (D.O.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Emergency Medicine (License #036095672 in IL)
Emergency Medicine (License #036095672 in IL)
NPI status registered as active in NPPES database
Registered at 4201 W MEDICAL CENTER DR, MCHENRY, IL 600508409 (Tel: (815) 338-6600)
Registered at 4201 W MEDICAL CENTER DR, MCHENRY, IL 600508409 (Tel: (815) 338-6600)
Recorded as TROY SHAFFER, D.O.
Emergency Medicine (License #036095672 in IL)
NPI status registered as active in NPPES database
Registered at 2400 N ROCKTON AVE, ER DEPT, ROCKFORD, IL 611033655 (Tel: 8159715000)
Registered at 2400 N ROCKTON AVE, ROCKFORD, IL 611033655 (Tel: 8159715000)
Recorded as TROY SHAFFER, D.O.
Emergency Medicine (License #036095672 in IL)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
4201 W Medical Center Dr
Mchenry, IL 600508409
Phone: 8153386600
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.