Dr. Marlon Diaz Garcia, MD
- Medicare services, 2024
- 123
- Medicare patients, 2024
- 34
- MIPS score, 2024
- 95
- Hospital affiliations
- 1
- Industry payments
- $3,176
- Practice address
- 1901 W Harrison St, Chicago, IL 60612
- Practice phone
- Call (312) 864-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Garcia's professional email, personal email and mobile number
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Dr. Marlon Diaz Garcia is an internist in Chicago, Illinois
Dr. Garcia practices at John H. Stroger, Jr. Hospital of Cook County in Chicago, Illinois, part of Cook County Government.
Dr. Garcia's NPI, 1801102058, was assigned on August 25, 2010. Dr. Garcia holds Illinois license 036-132501.
- NPI
- 1801102058NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587987185
- NPI enumeration date
- August 25, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 864-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marlon Diaz Garcia practices at John H. Stroger, Jr. Hospital of Cook County in Chicago, Illinois
Dr. Garcia's primary practice is John H. Stroger, Jr. Hospital of Cook County, at 1901 W Harrison St, Chicago, IL 60612 in Cook County. The practice phone is (312) 864-6000.
- John H. Stroger, Jr. Hospital of Cook County1901 W Harrison St, Chicago, IL 60612 · Cook CountyPhone(312) 864-6000
Source: Dmand AI Affiliation Data
Dr. Marlon Diaz Garcia is affiliated with 1 site of care and 1 medical group
Dr. Garcia's primary practice is John H. Stroger, Jr. Hospital of Cook County in Chicago, Illinois, part of Cook County Government. The medical group on file is John H. Stroger, Jr. Hospital of Cook County.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marlon Diaz Garcia's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Garcia practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John H. Stroger, Jr. Hospital of Cook County | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marlon Diaz Garcia is one of 5,652 internists in Illinois
Internal medicine is Dr. Garcia's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Garcia is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Garcia
Counts of internists 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. Marlon Diaz Garcia billed Medicare for 123 services in 2024
CMS data shows 123 Medicare services from Dr. Garcia across 3 procedure codes in 2024, for 34 Medicare patients. Medicare paid $8,539 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Garcia's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1252024: 1232%
Dr. Garcia compared with the Illinois median for internists, 2024
- Dr. Garcia
- Illinois median
- Medicare services
- 123vs 56678% below
- Medicare patients
- 34vs 20884% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Garcia'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marlon Diaz Garcia treated 34 Medicare patients in 2024, average age 69
CMS counts 34 Medicare patients who saw Dr. Garcia in 2024. The largest group is 65 to 74, with 16 patients. 75% of them have high blood pressure, and 62% have diabetes. Their average risk score is 3.34, 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. Garcia's median patient age at 70, with 44% women.
Dr. Garcia's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Garcia's Medicare patients by sex, 2024
- Women2059%
- Men1441%
Chronic conditions among Dr. Garcia's Medicare patients, 2024
- High blood pressure75%
- Diabetes62%
- High cholesterol59%
- Chronic kidney disease53%
- Ischemic heart disease50%
- Heart failure47%
- COPD35%
- Tobacco use35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Garcia's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marlon Diaz Garcia scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Garcia for performance year 2024, reported as part of a group. Dr. Garcia accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Garcia's MIPS scores, performance year 2024
- 95of 100Final score
- 74.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 85of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Marlon Diaz Garcia received $3,176 in industry payments from 2016 to 2025
CMS Open Payments shows 111 general payments to Dr. Garcia from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $2,338.
General payments to Dr. Garcia by program year, 2016 to 2025
Companies that paid Dr. Garcia the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Marlon Diaz Garcia'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 DataMedicare Physician & Other Practitioners - by Provider (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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Dr. Marlon Diaz Garcia
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. Marlon Diaz Garcia's NPI number?
Dr. Marlon Diaz Garcia's NPI number is 1801102058. It was assigned on August 25, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Marlon Diaz Garcia?
Dr. Marlon Diaz Garcia is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Marlon Diaz Garcia practice?
Dr. Garcia practices at 1901 W Harrison St, Chicago, IL 60612. Dr. Garcia's primary practice is John H. Stroger, Jr. Hospital of Cook County in Chicago, Illinois, part of Cook County Government.
What is Dr. Marlon Diaz Garcia's office phone number?
The practice phone on file for Dr. Garcia is (312) 864-6000.
What is Dr. Marlon Diaz Garcia's medical license number?
Dr. Garcia holds Illinois license 036-132501.
Which hospitals is Dr. Marlon Diaz Garcia affiliated with?
Dr. Garcia practices at John H. Stroger, Jr. Hospital of Cook County in Chicago, Illinois.
What medical group is Dr. Marlon Diaz Garcia part of?
Dr. Garcia is linked to John H. Stroger, Jr. Hospital of Cook County.
Does Dr. Marlon Diaz Garcia accept Medicare?
Yes. CMS data shows Dr. Garcia billed Medicare for 123 services in 2024, and Dr. Garcia accepts Medicare assignment.
What is Dr. Marlon Diaz Garcia's MIPS score?
Dr. Garcia's MIPS final score for performance year 2024 is 95 out of 100, reported as part of a group.
How many Medicare patients does Dr. Marlon Diaz Garcia see?
CMS counts 34 Medicare patients who saw Dr. Garcia in 2024, with an average age of 69.
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What services does Dr. Marlon Diaz Garcia bill to Medicare?
In 2024, Dr. Garcia's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99238) and hospital inpatient care (99222).
Has Dr. Marlon Diaz Garcia received payments from drug or device companies?
CMS Open Payments shows $3,176 in general payments to Dr. Garcia from 5 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Marlon Diaz Garcia been practicing?
Dr. Garcia graduated from medical school in 2007, 19 years ago.
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