John Mirro, MD
NPI 1689678955 · Gastroenterology Physician · Merrillville, IN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mirro, MD is a Gastroenterology Physician provider in Merrillville, IN (NPI 1689678955).
Provider details
- NPI number
- 1689678955
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01024382A (IN)
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
21 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
50 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) |
|---|---|---|
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope45378 | 23 | $167 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 14 | $217 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 13 | $156 |
Typical Medicare-allowed amounts for these services range $156–$217 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 7895 Grand BlvdHobart, IN 46342-6665Phone: (219) 758-5008Fax: (219) 758-5009
Registry dates
- Enumerated
- 2005-06-02
- Last updated
- 2023-03-15
- Certified
- 2023-03-15
Frequently asked questions
- What is John Mirro's NPI number?
- John Mirro's National Provider Identifier (NPI) is 1689678955, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mirro's specialty?
- John Mirro is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mirro located?
- John Mirro's practice location on file with NPPES is 101 E 87th Ave Ste 420, Merrillville, IN 46410-7335.
- What is John Mirro's phone number?
- The practice phone number listed in the NPPES registry for John Mirro is (219) 758-5008.
- Does John Mirro accept Medicare?
- John Mirro is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mirro's NPI active?
- Yes — John Mirro's NPI (1689678955) is active in the NPPES registry as of the last update on 2023-03-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.