Physician Profile
William C. Chapman, MD
Unclaimed ProfileAbout Dr. Chapman
William C. Chapman, MD practices colon & rectal surgery in Saint Louis, MO. William is a 2015 graduate of Georgetown University School of Medicine. William is also listed as specializing in surgery. Medicare claims data shows William provided 93 services to 85 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
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (314) 454-7177
- Email not available
Practice Locations
1044 N MASON RD DIV SURG COLON/RECTAL, STE 310
Saint Louis, MO 63141
Procedures Most Often Billed to Medicare
93 services · 85 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Diagnostic exam of anus using an endoscope | Procedure | 46600 |
14 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
32 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
30 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
17 |
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 colorectal surgeons at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
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 — 29 related providers in 4 groups
Other colorectal surgeons in Saint Louis 7
Same specialty, same city.
Trained at Georgetown University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Georgetown University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of anus using an endoscope 6
Providers in MO who bill this service to Medicare most often.
Common questions
What does Dr. Chapman specialize in?
Dr. Chapman is a colorectal surgeon in Saint Louis, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Colon & Rectal Surgery”.
NPI registry
Where is Dr. Chapman located?
Dr. Chapman is listed at 1044 N Mason Rd Div Surg Colon/Rectal, Ste 310, Saint Louis, MO 63141. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Chapman's phone number?
The number on file is (314) 454-7177. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Chapman?
Dr. Chapman's National Provider Identifier is 1003297177. 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. Chapman go to medical school?
Dr. Chapman attended Georgetown University School of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Chapman have?
Dr. Chapman has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Chapman do most often?
According to Medicare billing data, Dr. Chapman performs procedures including diagnostic exam of anus 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. Chapman's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chapman. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.