Physician Profile
Unclaimed ProfileAbout ANSSTAS
Michael Ansstas, M.D. practices gastroenterology in Saint Louis, MO. According to Medicare claims data, Michael cared for 456 Medicare patients across 504 services.
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
- (314) 953-8799
- Email not available
Practice Locations
11155 DUNN RD STE 309E
Saint Louis, MO 63136
Procedures Most Often Billed to Medicare
504 services · 456 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
101 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
72 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
49 |
| Removal of stone or debris from bile or pancreatic duct using a flexible endoscope | Procedure | 43264 |
25 |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
22 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
16 |
| Insertion of stent into pancreatic or bile duct using a flexible endoscope | Procedure | 43274 |
16 |
| Injection beneath lining of large bowel using a flexible endoscope | Procedure | 45381 |
13 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
13 |
| Review by radiologist of image from tube placement into bile duct using an endoscope | Imaging | 74328 |
18 |
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 gastroenterology specialists in Saint Louis 8
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 2002 at Other 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 MO who bill this service to Medicare most often.
Common questions
What is Dr. Ansstas's specialty?
Dr. Ansstas is a gastroenterology in Saint Louis, MO. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where can I find Dr. Ansstas?
Dr. Ansstas is listed at 11155 DUNN RD STE 309E, Saint Louis, MO 63136. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Ansstas?
The number on file is (314) 953-8799. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ansstas's NPI number?
Dr. Ansstas's National Provider Identifier is 1851658728. 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. Ansstas's medical education?
Dr. Ansstas attended Other, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ansstas been practicing?
Dr. Ansstas has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Ansstas known for?
According to Medicare billing data, Dr. Ansstas performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare 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
Has Dr. Ansstas confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ansstas. 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.