Brian Blumenstein, MD
NPI 1194784645 · Gastroenterology Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Blumenstein, MD is a Gastroenterology Physician provider in Oak Lawn, IL (NPI 1194784645).
Provider details
- NPI number
- 1194784645
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036082788 (IL)
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
20 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
798 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 137 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 107 | $132 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 98 | $102 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 83 | $266 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 75 | $133 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 229 | 90 |
| Pantoprazole Sodium | 129 | 45 |
| Omeprazole | 119 | 35 |
| Lansoprazole | 80 | 23 |
| Mesalamine | 34 | 14 |
| Budesonidebrand: Budesonide Dr | 24 | — |
| Hydrocortisone | 22 | — |
| Sucralfate | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$104 across 5 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
- 2006-03-22
- Last updated
- 2009-01-15
Frequently asked questions
- What is Brian Blumenstein's NPI number?
- Brian Blumenstein's National Provider Identifier (NPI) is 1194784645, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Blumenstein's specialty?
- Brian Blumenstein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Blumenstein located?
- Brian Blumenstein's practice location on file with NPPES is 9921 Southwest Hwy, Oak Lawn, IL 60453-3767.
- What is Brian Blumenstein's phone number?
- The practice phone number listed in the NPPES registry for Brian Blumenstein is (708) 425-8616.
- Does Brian Blumenstein accept Medicare?
- Brian Blumenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Blumenstein's NPI active?
- Yes — Brian Blumenstein's NPI (1194784645) is active in the NPPES registry as of the last update on 2009-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.