Are you Dr. Chapman? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 1044 N Mason Rd, Div Surg Colon/Rectal, Ste 310, Saint Louis, MO 63141
About 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. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more, and new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1003297177.
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
- (314) 454-7177
- Email not available
Practice Locations
1044 N MASON RD DIV SURG COLON/RECTAL, STE 310
Saint Louis, MO 63141
Conditions Commonly Evaluated or Treated
Within Colon and Rectal Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Anorectal conditions
Anorectal disorders
Bowel disorders
- Bowel Blockage in Babies
- Constipation From Pain Medicine
- Difficulty Emptying Bowels
- Severely Enlarged Colon
- Twisted Bowel
- Chronic diarrhea
Bowel symptoms
Cancer
Colon conditions
Inflammatory bowel disease
Inflammatory conditions
Ostomy & bowel
Ostomy & surgical complications
Pain
Pelvic disorders
Skin conditions
Most searched conditions
Digestive emergencies
Infections
Infections & cysts
Pelvic floor & structure
Tumors & growths
Vascular & inflammatory
Procedures & services
Abdominal surgery
Anorectal procedures
Bowel management
Cancer surgery
Diagnostic tests
Diagnostics
Digestive
Endoscopy & minimally invasive
Excision & drainage
Fistula procedures
General surgery
Hemorrhoid treatments
Infection & Microbiology Tests
Inflammatory bowel surgery
Injections & pain relief
Minimally invasive surgery
Ostomy & bowel
Ostomy surgery
Pelvic therapy
Reconstructive surgery
Wound care
Most searched procedures
Cancer screening
Digestive health
Pelvic floor & prolapse
Therapy & rehabilitation
Procedures Most Often Billed to Medicare
93 services · 85 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of anus using an endoscope | Procedure | 46600 |
14 | Less often than most peers in Colon & Rectal Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
32 | As often as other peers in Colon & Rectal Surgery |
| 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 | As often as other peers in Colon & Rectal Surgery |
| 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 | Less often than most peers in Colon & Rectal Surgery |
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 7
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 — 30 related providers in 4 groups
Other colorectal surgeons in Saint Louis 8
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. Contact the office directly to confirm availability and scheduling.
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
Guide.md listings do not constitute medical advice or an endorsement.