Dr. Tristan Michael Flack, DO
- Medicare services, 2024
- 878
- Medicare patients, 2024
- 264
- Part D claims, 2016
- 65
- Hospital affiliations
- 1
- Industry payments
- $326
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Flack's professional email, personal email and mobile number
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Dr. Tristan Michael Flack is an internist in Towson, Maryland
Dr. Flack practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Dr. Flack's NPI, 1750720074, was assigned on June 19, 2013. Dr. Flack graduated from West Virginia School of Osteopathic Medicine in 2013. Dr. Flack holds New York license 284245.
- NPI
- 1750720074NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254624265
- NPI enumeration date
- June 19, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tristan Michael Flack practices at Greater Baltimore Medical Center in Baltimore, Maryland
Dr. Flack's primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000.
- Greater Baltimore Medical Center6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
Source: Dmand AI Affiliation Data
Dr. Tristan Michael Flack is affiliated with 1 site of care and 1 medical group
Dr. Flack's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. The medical group on file is Greater Baltimore Medical Center (GBMC).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tristan Michael Flack's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flack practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across GBMC HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Tristan Michael Flack is one of 3,320 internists in Maryland
Internal medicine is Dr. Flack's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Flack is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Dr. Flack
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. Tristan Michael Flack billed Medicare for 878 services in 2024
CMS data shows 878 Medicare services from Dr. Flack across 4 procedure codes in 2024, for 264 Medicare patients. Medicare paid $54,066 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Flack's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9872024: 87811%
Dr. Flack compared with the Maryland median for internists, 2024
- Dr. Flack
- Maryland median
- Medicare services
- 878vs 65634% above
- Medicare patients
- 264vs 2515% above
- Part D claims
- 65vs 30979% below
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Flack'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Flack and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tristan Michael Flack treated 264 Medicare patients in 2024, average age 77
CMS counts 264 Medicare patients who saw Dr. Flack in 2024. The largest group is 75 to 84, with 83 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.44, 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. Flack's median patient age at 76, with 49% women.
Dr. Flack's Medicare patients by age, 2024
Dr. Flack's Medicare patients by sex, 2024
- Women14455%
- Men12045%
Chronic conditions among Dr. Flack's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Chronic kidney disease56%
- Mood disorders56%
- Depression51%
- Heart failure49%
- Anxiety48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Flack's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tristan Michael Flack wrote 65 Medicare Part D claims in 2016
In 2016, Dr. Flack wrote 65 Medicare Part D claims. They cover 5 drugs, with $270 in total drug cost.
Dr. Flack's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Tristan Michael Flack takes part in Medicare
Dr. Flack accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Tristan Michael Flack received $326 in industry payments from 2017 to 2018
CMS Open Payments shows 6 general payments to Dr. Flack from 5 drug and device companies from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. Medtronic USA, Inc. paid the most, $142.
General payments to Dr. Flack by program year, 2017 to 2018
Companies that paid Dr. Flack the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Tristan Michael Flack graduated from West Virginia School of Osteopathic Medicine
Dr. Flack graduated from West Virginia School of Osteopathic Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Tristan Michael Flack'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) |
| 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) |
| 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 Dr. Tristan Michael Flack
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. Tristan Michael Flack's NPI number?
Dr. Tristan Michael Flack's NPI number is 1750720074. It was assigned on June 19, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Tristan Michael Flack?
Dr. Tristan Michael Flack is an internist in Towson, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Tristan Michael Flack practice?
Dr. Flack practices at 6701 North Charles Street, Baltimore, MD 21204. Dr. Flack's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
What is Dr. Tristan Michael Flack's office phone number?
The practice phone on file for Dr. Flack is (443) 849-2000.
What is Dr. Tristan Michael Flack's medical license number?
Dr. Flack holds New York license 284245.
Which hospitals is Dr. Tristan Michael Flack affiliated with?
Dr. Flack practices at Greater Baltimore Medical Center in Baltimore, Maryland.
What medical group is Dr. Tristan Michael Flack part of?
Dr. Flack is linked to Greater Baltimore Medical Center (GBMC).
Does Dr. Tristan Michael Flack accept Medicare?
Yes. CMS data shows Dr. Flack billed Medicare for 878 services in 2024, and Dr. Flack accepts Medicare assignment.
How many Medicare patients does Dr. Tristan Michael Flack see?
CMS counts 264 Medicare patients who saw Dr. Flack in 2024, with an average age of 77.
What services does Dr. Tristan Michael Flack bill to Medicare?
In 2024, Dr. Flack's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99231) and hospital inpatient care (99238).
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Where did Dr. Tristan Michael Flack go to medical school?
Dr. Flack graduated from West Virginia School of Osteopathic Medicine in 2013.
What drugs does Dr. Tristan Michael Flack prescribe most?
In 2016 Medicare Part D data, Dr. Flack's most prescribed drugs by claims were Metoprolol Tartrate, Simvastatin and Amlodipine Besylate.
Has Dr. Tristan Michael Flack received payments from drug or device companies?
CMS Open Payments shows $326 in general payments to Dr. Flack from 5 companies from 2017 to 2018. The largest total came from Medtronic USA, Inc.
How long has Dr. Tristan Michael Flack been practicing?
Dr. Flack graduated from medical school in 2013, 13 years ago.
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