John Tasiopoulos, D.O.
NPI 1346384492 · Gastroenterology Physician · Libertyville, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tasiopoulos, D.O. is a Gastroenterology Physician provider in Libertyville, IL (NPI 1346384492).
Provider details
- NPI number
- 1346384492
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 207RG0100X (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
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
967 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 380 | $132 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 178 | $172 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 147 | $412 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 141 | $327 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 43 | $293 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 901 | 263 |
| Omeprazole | 125 | 38 |
| Famotidine | 82 | 23 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 46 | 18 |
| Cholestyraminebrand: Cholestyramine Light | 43 | — |
| Mesalamine | 39 | 12 |
| Rabeprazole Sodium | 29 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,897 across 205 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
- 2007-02-19
- Last updated
- 2021-12-13
- Certified
- 2021-12-13
Frequently asked questions
- What is John Tasiopoulos's NPI number?
- John Tasiopoulos's National Provider Identifier (NPI) is 1346384492, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tasiopoulos's specialty?
- John Tasiopoulos is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Tasiopoulos located?
- John Tasiopoulos's practice location on file with NPPES is 1880 W Winchester Rd, Libertyville, IL 60048-5341.
- What is John Tasiopoulos's phone number?
- The practice phone number listed in the NPPES registry for John Tasiopoulos is (847) 247-0187.
- Does John Tasiopoulos accept Medicare?
- John Tasiopoulos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tasiopoulos's NPI active?
- Yes — John Tasiopoulos's NPI (1346384492) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.