Stephen Hasak, MD
NPI 1184063562 · Gastroenterology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Hasak, MD is a Gastroenterology Physician provider in Saint Louis, MO (NPI 1184063562).
Provider details
- NPI number
- 1184063562
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2015007987 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,378 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Stone Or Debris From Bile Or Pancreatic Duct Using a Flexible Endoscope43264 | 131 | $64 |
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 127 | $22 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 127 | $75 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 115 | $58 |
| Ultrasound Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope Through Mouth43237 | 106 | $142 |
| Insertion of Stent Into Pancreatic Or Bile Duct Using a Flexible Endoscope43274 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 81 | 30 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 70 | 70 |
| Lipase/Protease/Amylasebrand: Creon | 29 | — |
| Amitriptyline Hcl | 14 | — |
| Famotidine | 14 | — |
| Pantoprazole Sodium | 13 | — |
| Lipase/Protease/Amylasebrand: Zenpep | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,834 across 44 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-19
- Last updated
- 2019-07-02
Frequently asked questions
- What is Stephen Hasak's NPI number?
- Stephen Hasak's National Provider Identifier (NPI) is 1184063562, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Hasak's specialty?
- Stephen Hasak is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Hasak located?
- Stephen Hasak's practice location on file with NPPES is 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110-1003.
- What is Stephen Hasak's phone number?
- The practice phone number listed in the NPPES registry for Stephen Hasak is (314) 747-2075.
- Does Stephen Hasak accept Medicare?
- Stephen Hasak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Hasak's NPI active?
- Yes — Stephen Hasak's NPI (1184063562) is active in the NPPES registry as of the last update on 2019-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.