Physician Profile
Stephen L. Hasak, MD
Unclaimed ProfileAbout Dr. Hasak
Stephen L. Hasak, MD practices gastroenterology in Saint Louis, MO. Stephen is a 2013 graduate of Albany Medical College of Union University. According to Medicare claims data, Stephen cared for 1,218 Medicare patients across 1,378 services. The services billed most often include removal of stone or debris from bile or pancreatic duct using a flexible endoscope, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and review by radiologist of image from tube placement into bile duct using an endoscope.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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) 747-2075
- Email not available
Practice Locations
1 BARNES JEWISH HOSPITAL PLZ
Saint Louis, MO 63110
Conditions Commonly Evaluated or Treated
Within Gastroenterology 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
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
1,378 services · 1,218 patients · 24 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of stone or debris from bile or pancreatic duct using a flexible endoscope | Procedure | 43264 |
131 | More than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
115 | More often than most peers in Gastroenterology |
| Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth | Procedure | 43237 |
106 | More than most peers in Gastroenterology |
| Insertion of stent into pancreatic or bile duct using a flexible endoscope | Procedure | 43274 |
96 | More than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
57 | As often as other peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
48 | As often as other peers in Gastroenterology |
| Ultrasound guided needle aspiration or biopsy of esophagus using a flexible endoscope | Procedure | 43238 |
48 | More often than most peers in Gastroenterology |
| Removal of stent from pancreatic or bile duct using a flexible endoscope | Procedure | 43275 |
46 | More than most peers in Gastroenterology |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
40 | More often than most peers in Gastroenterology |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
28 | More often than most peers in Gastroenterology |
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.
Related specialists at this location 8
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 gastroenterologists in Saint Louis 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Albany Medical College of Union University 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Albany Medical College of Union University 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 8
Providers in MO who bill this service to Medicare most often.
Common questions
What is Dr. Hasak's specialty?
Dr. Hasak is a gastroenterologist in Saint Louis, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Hasak?
Dr. Hasak is listed at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Hasak?
The number on file is (314) 747-2075. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Hasak's NPI number?
Dr. Hasak's National Provider Identifier is 1184063562. 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. Hasak's medical education?
Dr. Hasak attended Albany Medical College of Union University, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hasak been practicing?
Dr. Hasak has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Hasak known for?
According to Medicare billing data, Dr. Hasak performs procedures including removal of stone or debris from bile or pancreatic duct using a flexible endoscope, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth; reads or performs imaging such as review by radiologist of image from tube placement into bile duct using an endoscope and review by radiologist of image from tube placement into bile and pancreatic 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. Hasak confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hasak. 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.