Provider Profile
Guerin T. Williams, PA
Unclaimed ProfileAbout Guerin Williams
Listed in the NPI registry as a physician assistant, Guerin T. Williams, PA practices in Chicago, IL. Medicare claims data shows Guerin provided 460 services to 419 patients. The services billed most often include ultrasound measurement of bladder capacity after voiding, established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more, and diagnostic exam of bladder and urethra using an endoscope. NPI 1750564787 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (312) 695-9797
- Email not available
Practice Locations
680 N LAKE SHORE DR SUITE 1000
Chicago, IL 60611
Procedures Most Often Billed to Medicare
460 services · 419 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ultrasound measurement of bladder capacity after voiding | Procedure | 51798 |
238 | More often than most peers in Physician Assistant |
| Diagnostic exam of bladder and urethra using an endoscope | Procedure | 52000 |
59 | More often than most peers in Physician Assistant |
| Insertion of device into abdomen with pressure and urine flow rate study | Procedure | 51797 |
14 | Less often than most peers in Physician Assistant |
| Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings | Procedure | 51784 |
14 | Less often than most peers in Physician Assistant |
| Complex measurement of pressure of urine flow in bladder with voiding pressure studies | Procedure | 51728 |
14 | Less often than most peers in Physician Assistant |
| Electronic assessment of bladder emptying | Procedure | 51741 |
11 | Less often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
76 | More often than most peers in Physician Assistant |
| New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more | Office visit | 99202 |
34 | More often than most peers in Physician Assistant |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other physician assistants in Chicago 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Ultrasound measurement of bladder capacity after voiding 8
Providers in IL who bill this service to Medicare most often.
Common questions
What kind of doctor is Guerin T. Williams?
Guerin T. Williams is a physician assistant in Chicago, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Guerin T. Williams's address?
Guerin T. Williams is listed at 680 N Lake Shore Dr Suite 1000, Chicago, IL 60611. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Guerin T. Williams?
The number on file is (312) 695-9797. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Guerin T. Williams?
Guerin T. Williams's National Provider Identifier is 1750564787. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Guerin T. Williams train?
Guerin T. Williams attended Other, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Guerin T. Williams have?
Guerin T. Williams has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What procedures does Guerin T. Williams perform?
According to Medicare billing data, Guerin T. Williams performs procedures including ultrasound measurement of bladder capacity after voiding, diagnostic exam of bladder and urethra using an endoscope and insertion of device into abdomen with pressure and urine flow rate study, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Guerin T. Williams's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Guerin T. Williams. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.