Physician Profile
Unclaimed ProfileAbout CHADWICK
Based in Belleville, IL, William A Chadwick, M.D. is listed in the NPI registry under obstetrics/gynecology. William is also listed as specializing in obstetrics & gynecology. Medicare claims data shows William provided 384 services to 308 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (618) 234-2390
- Email not available
Practice Locations
4600 MEMORIAL DR STE 240
Belleville, IL 62226
Procedures Most Often Billed to Medicare
384 services · 308 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of lining of uterus and/or removal of polyp using an endoscope | Procedure | 58558 |
13 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
214 |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
96 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
32 |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
29 |
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.
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.
Other obstetrics/gynecology specialists in Belleville 1
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1985 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of lining of uterus and/or removal of polyp using an endoscope 8
Providers in IL who bill this service to Medicare most often.
Common questions
What does Dr. Chadwick specialize in?
Dr. Chadwick is an obstetrics/gynecology in Belleville, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OBSTETRICS/GYNECOLOGY”.
NPI registry
Where is Dr. Chadwick located?
Dr. Chadwick is listed at 4600 MEMORIAL DR STE 240, Belleville, IL 62226. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Chadwick's phone number?
The number on file is (618) 234-2390. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Chadwick?
Dr. Chadwick's National Provider Identifier is 1568454775. 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 Dr. Chadwick go to medical school?
Dr. Chadwick attended Other, graduating in 1985. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Chadwick have?
Dr. Chadwick has 41 years experience. Calculated from a graduation year of 1985, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Chadwick do most often?
According to Medicare billing data, Dr. Chadwick performs procedures including biopsy of lining of uterus and/or removal of polyp using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Chadwick's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chadwick. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.