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WILLIAM A CHADWICK M.D.
NPI 1568454775
Obstetrics & Gynecology in Belleville, IL

Active since August 16, 2005PECOS EnrolledAccepts Medicare Assignment
4600 MEMORIAL DR STE 240, BELLEVILLE, IL 62226(618) 234-2390(618) 234-9936 Get Directions Write a Review

NPPES record last updated: February 12, 2021. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William A Chadwick M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM A CHADWICK M.D. (NPI 1568454775) is an individual obstetrics & gynecology provider in Belleville, Illinois, licensed in Illinois (036-082912) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and is a graduate of Other (1985).

NPPES Registry Identity

NPI1568454775
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameWILLIAM A CHADWICKCredential: M.D.
Location Address4600 MEMORIAL DR STE 240Belleville, IL 62226-5363
Mailing Address4600 Memorial Dr, Suite 400Belleville, IL 62226-5366 · (618) 234-2390 · Fax (618) 234-9936
Phone(618) 234-2390
Fax(618) 234-9936
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateAugust 16, 2005
Last NPPES UpdateFebruary 12, 2021
NPPES CertifiedFebruary 12, 2021
✔ NPI 1568454775 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in IL · 036-082912
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
4600 MEMORIAL DR STE 240, Belleville, IL 62226
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Other Identifiers 1

Medicaid1568454775IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William A Chadwick M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2365349172
PECOS Enrollment IDI20040510000876
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
214 services138 patients
Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
96 services96 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
32 services32 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
29 services29 patients
Biopsy of lining of uterus and/or removal of polyp using an endoscope 58558
This procedure involves using a thin, flexible tool (endoscope) to examine and possibly remove a small tissue sample from the inner layer of your uterus. It may also involve removing a growth. It helps to identify any issues and plan the right treatment.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Memorial Hospital

Acute Care Hospitals · Belleville, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140185
Location4500 Memorial DriveBelleville, IL 62226 · St. Clair County
Emergency services Birthing friendly

Hshs St Elizabeth's Hospital

Acute Care Hospitals · O Fallon, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140187
LocationOne St Elizabeth BoulevardO Fallon, IL 62269 · St. Clair County
Emergency services Birthing friendly

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62226 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$131.14 typical visit price
range $56.28 – $173.35
Typical copayment $32.78 (range $14.07 – $43.33)
Most-billed visit code 99204
Established Patient
$70.42 typical visit price
range $17.51 – $139.99
Typical copayment $17.60 (range $4.37 – $34.99)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. NANCY BEATRICE MOORE WHNP
Nurse Practitioner (Women's Health)
4600 MEMORIAL DR STE 240
BELLEVILLE, IL 62226
St. Clair County (618) 234-2390

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Chadwick's NPI number?

The NPI number for William Chadwick is 1568454775. It was assigned to this individual provider in the NPPES registry on August 16, 2005.

Where is William Chadwick located?

William Chadwick practices at 4600 Memorial Dr Ste 240, Belleville, IL 62226. The listed phone number is (618) 234-2390.

What is William Chadwick's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is William Chadwick enrolled in Medicare?

Yes. William Chadwick is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is William Chadwick affiliated with any hospitals?

According to CMS data, William Chadwick is affiliated with Memorial Hospital, Hshs St Elizabeth's Hospital and Barnes Jewish Hospital.

When was this NPI record last updated?

The NPPES record for William Chadwick was last updated on February 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.