Michael Clanahan, MD
NPI 1457707515 · Gastroenterology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Clanahan, MD is a Gastroenterology Physician provider in Saint Louis, MO (NPI 1457707515).
Provider details
- NPI number
- 1457707515
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35.138738 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 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
219 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 | 39 | $235 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 31 | $88 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 31 | $230 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 30 | $69 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 27 | $162 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 184 | 182 |
| Omeprazole | 163 | 51 |
| Pantoprazole Sodium | 84 | 32 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 45 | 44 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 27 | 27 |
| Dicyclomine Hcl | 21 | — |
| Loperamide Hclbrand: Loperamide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$139 across 2 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
- 2016-05-09
- Last updated
- 2023-08-02
- Certified
- 2023-08-02
Frequently asked questions
- What is Michael Clanahan's NPI number?
- Michael Clanahan's National Provider Identifier (NPI) is 1457707515, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Clanahan's specialty?
- Michael Clanahan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Clanahan located?
- Michael Clanahan's practice location on file with NPPES is 615 S New Ballas Rd Ste 1200, Saint Louis, MO 63141-8221.
- What is Michael Clanahan's phone number?
- The practice phone number listed in the NPPES registry for Michael Clanahan is (314) 251-2880.
- Does Michael Clanahan accept Medicare?
- Michael Clanahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Clanahan's NPI active?
- Yes — Michael Clanahan's NPI (1457707515) is active in the NPPES registry as of the last update on 2023-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.