Stephen Baum, MD
NPI 1083650485 · Gastroenterology Physician · Billings, MT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Baum, MD is a Gastroenterology Physician provider in Billings, MT (NPI 1083650485).
Provider details
- NPI number
- 1083650485
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 7412 (MT)
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
19 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
571 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 Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 204 | $242 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 63 | $91 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 58 | $133 |
| Colorectal Cancer Screening; Colonoscopy on Individual Not Meeting Criteria for High RiskG0121 | 47 | $178 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 41 | $92 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$254 across 6 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
- 2006-06-22
- Last updated
- 2011-04-11
Frequently asked questions
- What is Stephen Baum's NPI number?
- Stephen Baum's National Provider Identifier (NPI) is 1083650485, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Baum's specialty?
- Stephen Baum is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Baum located?
- Stephen Baum's practice location on file with NPPES is 1144 N 28th St, Billings, MT 59101-0110.
- What is Stephen Baum's phone number?
- The practice phone number listed in the NPPES registry for Stephen Baum is (406) 238-6380.
- Does Stephen Baum accept Medicare?
- Stephen Baum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Baum's NPI active?
- Yes — Stephen Baum's NPI (1083650485) is active in the NPPES registry as of the last update on 2011-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.