Alex John, M.D.
NPI 1588634182 · Gastroenterology Physician · Colchester, VT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex John, M.D. is a Gastroenterology Physician provider in Colchester, VT (NPI 1588634182).
Provider details
- NPI number
- 1588634182
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0420008088 (VT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
211 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 82 | $231 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 26 | $89 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 26 | $103 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $122 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 20 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 48 | 47 |
| Omeprazole | 40 | 12 |
| Mesalamine | 32 | — |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 26 | 26 |
| Mesalaminebrand: Mesalamine Er | 21 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 20 | 20 |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-25
- Last updated
- 2024-08-20
- Certified
- 2024-08-20
Frequently asked questions
- What is Alex John's NPI number?
- Alex John's National Provider Identifier (NPI) is 1588634182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex John's specialty?
- Alex John is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Alex John located?
- Alex John's practice location on file with NPPES is 875 Roosevelt Hwy, Colchester, VT 05446-4460.
- What is Alex John's phone number?
- The practice phone number listed in the NPPES registry for Alex John is (802) 864-7483.
- Does Alex John accept Medicare?
- Alex John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex John's NPI active?
- Yes — Alex John's NPI (1588634182) is active in the NPPES registry as of the last update on 2024-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.