Gregory Machiko, MD
NPI 1831191618 · Gastroenterology Physician · Canonsburg, PA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Machiko, MD is a Gastroenterology Physician provider in Canonsburg, PA (NPI 1831191618).
Provider details
- NPI number
- 1831191618
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD036665E (PA)
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
195 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) |
|---|---|---|
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 70 | $101 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 60 | $242 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 23 | $124 |
| Removal of Polyps Or Growths of Esophagus, Stomach, And/Or Upper Small Bowel Using an Endoscope With Mechanical Snare43251 | 15 | $176 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 14 | $172 |
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 |
|---|---|---|
| Pantoprazole Sodium | 643 | 141 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 191 | 184 |
| Omeprazole | 84 | 18 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 56 | 55 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 37 | 35 |
| Linaclotidebrand: Linzess | 31 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$994 across 39 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
- 2005-08-11
- Last updated
- 2020-11-18
- Certified
- 2020-11-18
Frequently asked questions
- What is Gregory Machiko's NPI number?
- Gregory Machiko's National Provider Identifier (NPI) is 1831191618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Machiko's specialty?
- Gregory Machiko is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Machiko located?
- Gregory Machiko's practice location on file with NPPES is 161 Waterdam Road, Canonsburg, PA 15317-2472.
- What is Gregory Machiko's phone number?
- The practice phone number listed in the NPPES registry for Gregory Machiko is (412) 359-8900.
- Does Gregory Machiko accept Medicare?
- Gregory Machiko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Machiko's NPI active?
- Yes — Gregory Machiko's NPI (1831191618) is active in the NPPES registry as of the last update on 2020-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.