Regina Williams , PA-C
Physician Assistant • Mount Prospect, IL
Professional Overview & Biography Verified Profile Summary
Regina Williams, PA-C is a certified Physician Assistant practicing in Mount Prospect, IL. With approximately 33 years of clinical experience since completing medical education in 1993, Regina Williams delivers high-quality medical care to the local community at 199 W RAND RD.
Regina Williams is affiliated with Endeavor Health Medical Group and accepts Medicare assignment.
Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
199 W Rand Rd
Mount Prospect, IL 600561151
Medicare Profile & Education
Other
1993
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Physician Assistant in Mount Prospect, IL
Practicing in Mount Prospect, IL (4958 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 |
|---|---|---|---|---|
|
99213
Established patient office or other outpatient visit, typically 15 minutes
|
354 | 335 | $175.00 | $81.34 |
|
99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
83 | 83 | $242.00 | $100.60 |
|
99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
41 | 39 | $110.00 | $50.87 |
Medical Specialties & State Licenses
CMS Verified: 2026-04-02NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Endeavor Health Medical Group
2650 Ridge Ave, Evanston, IL 602011700
Endeavor Health Medical Group
1450 Busch Pkwy, Buffalo Grove, IL 600894541
Phone: 8477258640
Endeavor Health Medical Group
21481 N Rand Rd, Kildeer, IL 600473061
Phone: 8476189696
Endeavor Health Medical Group
455 S Roselle Rd, Schaumburg, IL 601932971
Phone: 8479850600
Endeavor Health Medical Group
199 W Rand Rd, Mount Prospect, IL 600561151
Phone: 8476185400
Endeavor Health Medical Group
21481 N Rand Rd, Kildeer, IL 600473061
Phone: 8478667846
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Pediatrics
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Advanced Practice Registered Nurse
Family Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 2650 RIDGE AVE STE 1223, EVANSTON, IL 602011700 (Tel: 8475702040)
Recorded as REGINA WILLIAMS, PA-C
Registered at 199 W RAND RD, MOUNT PROSPECT, IL 600561151 (Tel: 8476185400)
Registered at 199 W RAND RD, MOUNT PROSPECT, IL 600561151 (Tel: 8476185400)
NPI status registered as active in NPPES database
Registered at 1300 BUSCH PKWY, BUFFALO GROVE, IL 600894505 (Tel: 8474597860)
Registered at PO BOX 95259, PALATINE, IL 600950259 (Tel: 8474597860)
Recorded as REGINA WILLIAMS, P.A.
Physician Assistant (License #1026417 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
2650 Ridge Ave Ste 1223
Evanston, IL 602011700
Phone: 8475702040
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.