Mark Gromski, MD
NPI 1255625679 · Gastroenterology Physician · Indianapolis, IN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gromski, MD is a Gastroenterology Physician provider in Indianapolis, IN (NPI 1255625679).
Provider details
- NPI number
- 1255625679
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 248129 (MA)
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
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
319 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) |
|---|---|---|
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 49 | $21 |
| Ultrasound Guided Needle Aspiration Or Biopsy of Esophagus Using a Flexible Endoscope43238 | 43 | $177 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 43 | $73 |
| Ultrasound Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope Through Mouth43237 | 40 | $157 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 40 | $42 |
| Removal of Stone Or Debris From Bile Or Pancreatic Duct Using a Flexible Endoscope43264 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 29 | — |
| Omeprazole | 23 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 22 | 22 |
| Dicyclomine Hcl | 19 | — |
| Ciprofloxacin Hcl | 14 | 13 |
| Lipase/Protease/Amylasebrand: Creon | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$39,560 across 43 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
Additional practice locations (1)
- 550 University Blvd Ste 1634Indianapolis, IN 46202-5149Phone: (317) 944-0980Fax: (317) 968-1265
Registry dates
- Enumerated
- 2011-06-02
- Last updated
- 2025-03-12
- Certified
- 2025-03-12
Frequently asked questions
- What is Mark Gromski's NPI number?
- Mark Gromski's National Provider Identifier (NPI) is 1255625679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gromski's specialty?
- Mark Gromski is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gromski located?
- Mark Gromski's practice location on file with NPPES is 1701 N Senate Blvd, Indianapolis, IN 46202-1239.
- What is Mark Gromski's phone number?
- The practice phone number listed in the NPPES registry for Mark Gromski is (888) 484-3258.
- Does Mark Gromski accept Medicare?
- Mark Gromski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gromski's NPI active?
- Yes — Mark Gromski's NPI (1255625679) is active in the NPPES registry as of the last update on 2025-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.