Dr. Mark Andrew Gromski, MD

  • Indianapolis, IN
  • Gastroenterologist
NPI1255625679PAC ID9133343486
Medicare services, 2024
319
Medicare patients, 2024
203
Part D claims, 2024
158
Publications
79
Clinical trials
2
Practice address
1701 N Senate Blvd, Indianapolis, IN 46202
Practice phone
Call (317) 962-2000
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

IU Health Methodist Hospital

Hospital · Indianapolis, Indiana

See all 4 affiliations

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Dr. Mark Andrew Gromski is a gastroenterologist in Indianapolis, Indiana

Dr. Gromski practices at IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health.

Dr. Gromski's NPI, 1255625679, was assigned on June 2, 2011. Dr. Gromski holds Indiana license 01073629A.

NPI and contact details
Medicare PAC ID
9133343486
NPI enumeration date
June 2, 2011
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(317) 962-2000
Professional email
Get email
Personal email
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Mobile number
Get number
Sex
Male
Estimated age
41
Medical school graduation
2011

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Mark Andrew Gromski practices at IU Health Methodist Hospital in Indianapolis, Indiana

Dr. Gromski's primary practice is IU Health Methodist Hospital, at 1701 N Senate Blvd, Indianapolis, IN 46202 in Marion County. The practice phone is (317) 962-2000.

Source: Dmand AI Affiliation Data

Dr. Mark Andrew Gromski is affiliated with 2 sites of care and 2 medical groups

Dr. Gromski's primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. The medical group on file is IU Health Medical Group. Dmand AI also links Dr. Gromski to 1 more behavioral health center and 1 medical group, each named with a free account.

See all 4 affiliations for Dr. Gromski

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Mark Andrew Gromski's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gromski practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
IU Health Methodist HospitalAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Mark Andrew Gromski is one of 333 gastroenterologists in Indiana

Gastroenterology is Dr. Gromski's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Gromski's licenses on file in 2 states: Indiana and Massachusetts.

Specialties and state licenses

  • Gastroenterology, IndianaPrimaryLicense 01073629A · taxonomy 207RG0100X
  • Internal medicine, MassachusettsLicense 248129 · taxonomy 207R00000X

Gastroenterologists near Dr. Gromski

Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Mark Andrew Gromski billed Medicare for 319 services in 2024

CMS data shows 319 Medicare services from Dr. Gromski across 9 procedure codes in 2024, for 203 Medicare patients. Medicare paid $28,683 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024319
Medicare patients203
Paid by Medicare$28,683
Procedure codes9

Dr. Gromski's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Surgery
2023: 2482024: 19123%
Office and hospital visits
2023: 592024: 7934%
Imaging
2023: 602024: 4918%

Dr. Gromski compared with the Indiana median for gastroenterologists, 2024

  • Dr. Gromski
  • Indiana median
Medicare services
319vs 47132% below
Medicare patients
203vs 30934% below
Part D claims
119vs 42272% below

Medians across 330 gastroenterologists in Indiana with Dmand AI profiles that report each measure.

Dr. Gromski's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Gromski

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Mark Andrew Gromski treated 203 Medicare patients in 2024, average age 71

CMS counts 203 Medicare patients who saw Dr. Gromski in 2024. The largest group is 65 to 74, with 94 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.72, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Gromski's median patient age at 59, with 53% women.

Medicare patients, 2024203
Average age71
Average risk score1.72
Also on Medicaid16%

Dr. Gromski's Medicare patients by age, 2024

Dr. Gromski's Medicare patients by sex, 2024

  • Women11657%
  • Men8743%

Chronic conditions among Dr. Gromski's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis51%
  4. Diabetes44%
  5. Anxiety35%
  6. Depression34%
  7. Mood disorders34%
  8. Ischemic heart disease31%

Share of Medicare patients with each condition. A patient can have several.

Dr. Gromski's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 59

Patient panel by sex, all payers

  • Women53%
  • Men47%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Mark Andrew Gromski wrote 158 Medicare Part D claims in 2024

In 2024, Dr. Gromski wrote 158 Medicare Part D claims for 79 patients. 89% of them were for generic drugs. CMS names the drug for 119 of them, across 6 drugs with 11 or more claims each, at $71,859 in total drug cost. In 2023, CMS named 66 claims across 4 drugs.

Part D claims, 2024158
Drugs named by CMS6
Total drug cost$71,859
Part D patients79

Dr. Gromski's Part D claims by kind of drug, 2024

  • Generic141 claims89%
  • Brand-name17 claims11%

Dr. Gromski's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Gromski's Part D claims, 2024

  • Opioids7%11 of 158 claims
  • Antibiotics26%41 of 158 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 662024: 11980%

Drugs named by CMS: 6 in 2024, 4 in 2023.

See all prescribing by Dr. Gromski

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Mark Andrew Gromski scored 91 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Gromski for performance year 2024, reported through an alternative payment model (APM). Dr. Gromski accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 265 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Gromski, more than 94% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Dr. Gromski's MIPS scores, performance year 2024

  • 91of 100Final score
  • 72.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Gromski ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
94th percentile265 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Mark Andrew Gromski has 79 publications on record

Dmand AI links 79 papers to Dr. Gromski, published from 2011 to 2025. 2019 was the busiest year, with 8. The most frequent topics are Cholangiopancreatography, Endoscopic Retrograde, Swine and Pancreatic Ducts. Dr. Gromski has published most often in Gastrointest Endosc. Dr. Gromski's most frequent co-authors are Evan L. Fogel, MD, Jeffrey James Easler, MD and Glen A. Lehman, MD.

Papers79
Years published2011 to 2025

Dr. Gromski's papers by year, 2016 to 2025

Topics Dr. Gromski writes about most

  • Cholangiopancreatography, Endoscopic Retrograde
  • Swine
  • Pancreatic Ducts
  • Pancreatitis, Chronic
  • Stents
  • Stomach
  • Clinical Competence
  • Constriction, Pathologic

Dr. Gromski's most frequent co-authors

Recent publications by Dr. Gromski

See all 79 publications and co-authors

See who Dr. Gromski researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gromski works with, so you can find a warm path to the right gastroenterologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Mark Andrew Gromski has worked on 2 clinical trials

Dmand AI links Dr. Gromski to 2 clinical trials. 1 is still active or recruiting. Conditions studied include Obesity, Pancreatitis, Acute Necrotizing and Overnutrition.

Conditions in Dr. Gromski's trials

  • Obesity
  • Pancreatitis, Acute Necrotizing
  • Overnutrition
  • Pancreatitis

Investigators on the most trials with Dr. Gromski

Recent clinical trials with Dr. Gromski

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Mark Andrew Gromski received $155,079 in industry payments from 2016 to 2025

CMS Open Payments shows 204 general payments to Dr. Gromski from 11 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 65% of the total. Boston Scientific Corporation paid the most, $109,696.

General payments to Dr. Gromski by program year, 2016 to 2025

General payments to Dr. Gromski by kind, 2016 to 2025

$155.1Kin total
  • Speaker and faculty fees$101,46865%
  • Consulting fees$40,25626%
  • Travel and lodging$7,4415%
  • Food and beverage$5,9154%

Companies that paid Dr. Gromski the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Gromski

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Dr. Mark Andrew Gromski's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Mark Andrew Gromski

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Mark Andrew Gromski's NPI number?

Dr. Mark Andrew Gromski's NPI number is 1255625679. It was assigned on June 2, 2011, and it is active in the NPI Registry.

What kind of doctor is Dr. Mark Andrew Gromski?

Dr. Mark Andrew Gromski is a gastroenterologist in Indianapolis, Indiana. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Mark Andrew Gromski practice?

Dr. Gromski practices at 1701 N Senate Blvd, Indianapolis, IN 46202. Dr. Gromski's primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. Dmand AI also links Dr. Gromski to 1 behavioral health center and 1 medical group.

What is Dr. Mark Andrew Gromski's office phone number?

The practice phone on file for Dr. Gromski is (317) 962-2000.

What is Dr. Mark Andrew Gromski's medical license number?

Dr. Gromski holds Indiana license 01073629A, one of the licenses on file in 2 states.

Which states has Dr. Mark Andrew Gromski been licensed in?

Dmand AI has state licenses on file for Dr. Gromski in Indiana and Massachusetts.

Which hospitals is Dr. Mark Andrew Gromski affiliated with?

Dr. Gromski practices at IU Health Methodist Hospital in Indianapolis, Indiana.

What medical group is Dr. Mark Andrew Gromski part of?

Dr. Gromski is linked to IU Health Medical Group. Dmand AI links Dr. Gromski to 1 more medical group.

Does Dr. Mark Andrew Gromski accept Medicare?

Yes. CMS data shows Dr. Gromski billed Medicare for 319 services in 2024, and Dr. Gromski accepts Medicare assignment.

What is Dr. Mark Andrew Gromski's MIPS score?

Dr. Gromski's MIPS final score for performance year 2024 is 91 out of 100, reported through an alternative payment model (APM).

Show 7 more questionsShow fewer questions

How many Medicare patients does Dr. Mark Andrew Gromski see?

CMS counts 203 Medicare patients who saw Dr. Gromski in 2024, with an average age of 71.

What services does Dr. Mark Andrew Gromski bill to Medicare?

In 2024, Dr. Gromski's most billed Medicare services were diagnostic imaging (74328), surgery: digestive system (43238) and hospital inpatient care (99232).

What drugs does Dr. Mark Andrew Gromski prescribe most?

In 2024 Medicare Part D data, Dr. Gromski's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Amoxicillin-Clavulanate Potass.

Has Dr. Mark Andrew Gromski received payments from drug or device companies?

CMS Open Payments shows $155,079 in general payments to Dr. Gromski from 11 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.

How long has Dr. Mark Andrew Gromski been practicing?

Dr. Gromski graduated from medical school in 2011, 15 years ago.

Does Dr. Mark Andrew Gromski do research?

Dmand AI links 79 publications to Dr. Gromski, published from 2011 to 2025. Dr. Gromski has worked on 2 clinical trials.

Who does Dr. Mark Andrew Gromski publish with?

Dr. Gromski's most frequent co-authors are Evan L. Fogel, MD (22 shared papers), Jeffrey James Easler, MD (19 shared papers) and Glen A. Lehman, MD (15 shared papers).

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