Gabriel E. Marrero Rivera
- Medicare services, 2022
- 121
- Part D claims, 2020
- 65
- Hospital affiliations
- 1
- Industry payments
- $466
- Medical group
- 1
- Practice address
- 840 W Taylor St, Chicago, IL 60607
- Practice phone
- Call (312) 996-7312
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The Board of Trustees of the University of Illinois
Chicago, Illinois
Find Gabriel Marrero Rivera's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Gabriel E. Marrero Rivera is a gastroenterologist in Chicago, Illinois
Gabriel Marrero Rivera practices at The Board of Trustees of the University of Illinois in Chicago, Illinois.
Gabriel Marrero Rivera's NPI, 1447707229, was assigned on September 8, 2016. Gabriel Marrero Rivera graduated from University of Puerto Rico School of Medicine in 2017. Gabriel Marrero Rivera holds Pennsylvania license MT225105.
- NPI
- 1447707229NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729411392
- NPI enumeration date
- September 8, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 996-7312
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Gabriel E. Marrero Rivera practices at The Board of Trustees of the University of Illinois in Chicago, Illinois
Gabriel Marrero Rivera's primary practice is The Board of Trustees of the University of Illinois, at 840 W Taylor St, Chicago, IL 60607 in Cook County. The practice phone is (312) 996-7312.
- The Board of Trustees of the University of Illinois840 W Taylor St, Chicago, IL 60607 · Cook CountyPhone(312) 996-7312
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Gabriel E. Marrero Rivera is affiliated with 3 sites of care and 1 medical group
Gabriel Marrero Rivera's primary practice is The Board of Trustees of the University of Illinois in Chicago, Illinois. Gabriel Marrero Rivera is also affiliated with University of Illinois Hospital. The medical group on file is University of Illinois Physicians Group (UIPG). Dmand AI also links Gabriel Marrero Rivera to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Gabriel E. Marrero Rivera's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gabriel Marrero Rivera practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Board of Trustees of the University of Illinois | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Gabriel E. Marrero Rivera is one of 771 gastroenterologists in Illinois
Gastroenterology is Gabriel Marrero Rivera's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Gabriel Marrero Rivera is licensed in Pennsylvania.
Specialties and state licenses
- Gastroenterology, PennsylvaniaPrimary
Gastroenterologists near Gabriel Marrero Rivera
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
Gabriel E. Marrero Rivera billed Medicare for 121 services in 2022
CMS data shows 121 Medicare services from Gabriel Marrero Rivera across 3 procedure codes in 2022. Medicare paid $5,617 for them. Every service was in a facility, such as a hospital, rather than an office.
Gabriel Marrero Rivera's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 252022: 121384%
Gabriel Marrero Rivera compared with the Illinois median for gastroenterologists, 2022
- Gabriel Marrero Rivera
- Illinois median
- Medicare services
- 121vs 49876% below
- Part D claims
- 65vs 37082% below
Medians across 757 gastroenterologists in Illinois with Dmand AI profiles that report each measure.
Gabriel Marrero Rivera's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Gabriel Marrero Rivera and other gastroenterologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Gabriel E. Marrero Rivera's patients have a median age of 55
Across all payers, Dmand AI patient panel data puts Gabriel Marrero Rivera's median patient age at 55, with 60% women.
Gabriel Marrero Rivera's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women60%
- Men38%
Source: Dmand AI Patient Panel Data
Gabriel E. Marrero Rivera wrote 65 Medicare Part D claims in 2020
In 2020, Gabriel Marrero Rivera wrote 65 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $620 in total drug cost. In 2019, CMS named 139 claims across 7 drugs.
Gabriel Marrero Rivera's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 1392020: 6553%
Drugs named by CMS: 5 in 2020, 7 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Gabriel E. Marrero Rivera ranks in the 54th percentile for colonoscopy in Medicare
Gabriel Marrero Rivera accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 31 procedures of colonoscopy by Gabriel Marrero Rivera, more than 54% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Gabriel Marrero Rivera ranks in Medicare procedure volume
- Colonoscopy
- 54th percentile31 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 53rd percentile25 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Gabriel E. Marrero Rivera received $466 in industry payments from 2022 to 2024
CMS Open Payments shows 5 general payments to Gabriel Marrero Rivera from 3 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $264.
General payments to Gabriel Marrero Rivera by program year, 2022 to 2024
Companies that paid Gabriel Marrero Rivera the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Gabriel E. Marrero Rivera graduated from University of Puerto Rico School of Medicine
Gabriel Marrero Rivera graduated from University of Puerto Rico School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gabriel E. Marrero Rivera's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Gabriel E. Marrero Rivera
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gabriel E. Marrero Rivera's NPI number?
Gabriel E. Marrero Rivera's NPI number is 1447707229. It was assigned on September 8, 2016, and it is active in the NPI Registry.
What does Gabriel E. Marrero Rivera specialize in?
Gabriel E. Marrero Rivera is a gastroenterologist in Chicago, Illinois. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Gabriel E. Marrero Rivera practice?
Gabriel Marrero Rivera practices at 840 W Taylor St, Chicago, IL 60607. Gabriel Marrero Rivera's primary practice is The Board of Trustees of the University of Illinois in Chicago, Illinois. Dmand AI also links Gabriel Marrero Rivera to 1 group practice or clinic.
What is Gabriel E. Marrero Rivera's office phone number?
The practice phone on file for Gabriel Marrero Rivera is (312) 996-7312.
What is Gabriel E. Marrero Rivera's medical license number?
Gabriel Marrero Rivera holds Pennsylvania license MT225105.
Which hospitals is Gabriel E. Marrero Rivera affiliated with?
Gabriel Marrero Rivera is affiliated with University of Illinois Hospital.
What medical group is Gabriel E. Marrero Rivera part of?
Gabriel Marrero Rivera is linked to University of Illinois Physicians Group (UIPG).
Does Gabriel E. Marrero Rivera accept Medicare?
Yes. CMS data shows Gabriel Marrero Rivera billed Medicare for 121 services in 2022, and Gabriel Marrero Rivera accepts Medicare assignment.
What services does Gabriel E. Marrero Rivera bill to Medicare?
In 2022, Gabriel Marrero Rivera's most billed Medicare services were hospital inpatient care (99231), hospital inpatient care (99232) and hospital inpatient care (99238).
Where did Gabriel E. Marrero Rivera go to medical school?
Gabriel Marrero Rivera graduated from University of Puerto Rico School of Medicine in 2017.
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What drugs does Gabriel E. Marrero Rivera prescribe most?
In 2020 Medicare Part D data, Gabriel Marrero Rivera's most prescribed drugs by claims were Furosemide, Atorvastatin Calcium and Minoxidil.
Has Gabriel E. Marrero Rivera received payments from drug or device companies?
CMS Open Payments shows $466 in general payments to Gabriel Marrero Rivera from 3 companies from 2022 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Gabriel E. Marrero Rivera been practicing?
Gabriel Marrero Rivera graduated from medical school in 2017, 9 years ago.
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