Doctors and health care providers in Oak Park, IL
2,307 individual NPPES records list a practice address in Oak Park, 15th of 541 Illinois cities. The largest group is clinical social worker: 281, 12% of the city's records, against 6% across Illinois. Page 47 of 47.
The 8 largest groups in Oak Park
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Oak Park in Illinois
- Rank in Illinois15th of 541 cities by records
- Share of the state1% of Illinois's records
- Specialties present25 or more taxonomy codes
- Top three groups28.6% of all records
- Clinical Social Worker rank4th of the 10 Illinois cities with the most
Compared with Illinois as a whole, Oak Park has 3× the state's share of acupuncturist records and 0.33× its share of student in an organized health care education/training program records.
Providers in Oak Park, alphabetically
- Mary Ziegler, MS, SLPSpeech-Language Pathologist1508173766
- Robert Ziffra, DPMFoot & Ankle Surgery Podiatrist1407588783
- Robert Zimmerman, M.D.Urology Physician1043355530
- Dina Zissimopoulos, APNFamily Nurse Practitioner1922376888
- Jennifer Zosel, M.S.Behavior Analyst1770943243
- Claire ZuchBehavior Analyst1801560263
- Alexa Zuniga, RBTBehavior Technician1235974452
The largest Illinois cities
- Chicago63,379
- Springfield4,997
- Naperville4,634
- Peoria4,621
- Evanston4,013
How to read this directory
Oak Park, Illinois appears in the CMS National Plan and Provider Enumeration System with 2,307 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Oak Park - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Oak Park practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.
The provider mix in Oak Park is weighted toward Clinical Social Worker (281 clinicians, followed by Behavior Technician with 240 and Mental Health Counselor with 138). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Illinois's population, Oak Park reports roughly 18.4 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.
For Oak Park patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.
For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.
Common questions
How many doctors are in Oak Park, IL?
There are 2,307 registered healthcare providers in Oak Park, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Oak Park?
The most common specialties in Oak Park are Clinical Social Worker, Behavior Technician, Mental Health Counselor, Professional Counselor, Physical Therapist. Clinical Social Worker has the most providers with 281.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.