Statewide totals
| Active NPI records | 306,258 |
| Registered sole proprietors | 74,034 (24.2%) |
The 24.2% figure describes the share of these records marked as sole proprietors, based on a self-reported field in NPPES. It is an imperfect proxy for private practice and should not be read as a direct count of independently owned practices or clinicians.
Largest specialties in this state
| Specialty | Active NPIs |
|---|---|
| Clinical Social Worker | 14,191 |
| Physical Therapist | 13,048 |
| Mental Health Counselor | 11,839 |
| Speech-Language Pathologist | 10,576 |
| Internal Medicine Physician | 10,198 |
| Professional Counselor | 9,979 |
| Student in an Organized Health Care Education/Training Program | 9,920 |
| Pharmacist | 9,759 |
| Behavior Technician | 8,274 |
| Family Medicine Physician | 7,528 |
| Chiropractor | 7,510 |
| General Practice Dentistry | 7,416 |
| Family Nurse Practitioner | 7,249 |
| Dentist | 6,065 |
| Social Worker | 6,059 |
| Occupational Therapist | 5,987 |
| Clinical Psychologist | 4,679 |
| Counselor | 4,517 |
| Physician Assistant | 4,445 |
| Optometrist | 4,035 |
| Nurse Practitioner | 4,017 |
| Registered Nurse | 3,851 |
| Pediatrics Physician | 3,674 |
| Durable Medical Equipment & Medical Supplies | 3,492 |
| Emergency Medicine Physician | 3,278 |
| Behavior Analyst | 3,076 |
| Registered Dietitian | 2,955 |
| Developmental Therapist | 2,835 |
| Physical Therapy Assistant | 2,658 |
| Anesthesiology Physician | 2,654 |
| Psychiatry Physician | 2,541 |
| Obstetrics & Gynecology Physician | 2,370 |
| Specialist | 2,308 |
| Athletic Trainer | 2,103 |
| Home Health Agency | 2,075 |
| Certified Registered Nurse Anesthetist | 2,025 |
| Addiction (Substance Use Disorder) Counselor | 1,999 |
| Diagnostic Radiology Physician | 1,901 |
| Surgery Physician | 1,852 |
| Community/Behavioral Health Agency | 1,764 |
Common questions
How many active NPI records have a practice location in Illinois?
There are 306,258 active NPI records with a practice location in Illinois.
Which specialties have the largest counts?
The largest listed specialties are Clinical Social Worker (14,191), Physical Therapist (13,048), Mental Health Counselor (11,839), Speech-Language Pathologist (10,576), and Internal Medicine Physician (10,198).
What does the sole-proprietor share mean?
It is the share of records flagged as sole proprietors in NPPES. The flag is self-reported and is an imperfect proxy for private practice.
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