Physician Profile
Unclaimed ProfileAbout CHAPMAN
Christopher Grant Chapman, M.D. is a healthcare provider in Chicago, IL specialising in gastroenterology. Christopher trained at Johns Hopkins University School of Medicine, graduating in 2008.
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
Common questions
What is Dr. Chapman's specialty?
Dr. Chapman is a gastroenterology in Chicago, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where can I find Dr. Chapman?
Dr. Chapman is listed at 1520 W HARRISON ST, Chicago, IL 60607. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Chapman?
The number on file is (312) 942-8651. 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 1235378043. 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
What is Dr. Chapman's medical education?
Dr. Chapman attended Johns Hopkins University School of Medicine, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Chapman have?
Dr. Chapman has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Chapman known for?
According to Medicare billing data, Dr. Chapman performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, insertion of stent into pancreatic or bile duct using a flexible endoscope and biopsy of large bowel using a flexible endoscope; reads or performs imaging such as review by radiologist of image from tube placement into bile duct 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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (312) 942-8651
- Email not available
Practice Locations
1520 W HARRISON ST
Chicago, IL 60607
Procedures Most Often Billed to Medicare
318 services · 270 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
67 |
| Insertion of stent into pancreatic or bile duct using a flexible endoscope | Procedure | 43274 |
36 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
33 |
| Removal of stone or debris from bile or pancreatic duct using a flexible endoscope | Procedure | 43264 |
31 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
29 |
| Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43242 |
19 |
| Removal of large bowel tissue using a flexible endoscope | Procedure | 45390 |
15 |
| Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth | Procedure | 43237 |
13 |
| Review by radiologist of image from tube placement into bile duct using an endoscope | Imaging | 74328 |
45 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
18 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
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.
Other gastroenterology specialists in Chicago 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Johns Hopkins University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2008 at Johns Hopkins University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in IL who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.