DR. TRISTAN MICHAEL FLACK D.O.
NPI 1750720074
Internal Medicine in Baltimore, MD
About Dr. Tristan Michael Flack D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TRISTAN MICHAEL FLACK D.O. (NPI 1750720074) is an individual internal medicine provider in Baltimore, Maryland, licensed in New York (284245) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Greater Baltimore Medical Center, and is a graduate of West Virginia School Of Osteopathic Medicine (2013).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Tristan Michael Flack D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Tristan Flack reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baltimore, MD 21204
- Reassigned Medicare billing, Maryland enrollment
- 444 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Greater Baltimore Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21204 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21204
BALTIMORE, MD 21204
BALTIMORE, MD 21204
BALTIMORE, MD 21204
BALTIMORE, MD 21204
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Tristan Flack's NPI number?
The NPI number for Tristan Flack is 1750720074. It was assigned to this individual provider in the NPPES registry on June 19, 2013.
Where is Tristan Flack located?
Tristan Flack practices at 6701 N Charles St, Baltimore, MD 21204. The listed phone number is (443) 849-2682.
What is Tristan Flack's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Tristan Flack enrolled in Medicare?
Yes. Tristan Flack is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Tristan Flack's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tristan Flack reassigns Medicare benefits to Greater Baltimore Medical Center, Inc. (Baltimore, MD). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tristan Flack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Tristan Flack affiliated with any hospitals?
According to CMS data, Tristan Flack is affiliated with Greater Baltimore Medical Center.
When was this NPI record last updated?
The NPPES record for Tristan Flack was last updated on August 30, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Tristan Michael Flack, D.O. · NPI 1750720074
Internal Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since June 19, 2013.
## Identity
- **NPI:** 1750720074 (Entity type: Individual)
- **Enumerated:** June 19, 2013
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 284245 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 6701 N CHARLES ST, Baltimore, MD 21204
- **Phone:** (443) 849-2682
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Greater Baltimore Medical Center, Inc. (NPI 1619905460, Baltimore, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** West Virginia School Of Osteopathic Medicine, class of 2013
## Record status
- **NPPES last updated:** August 30, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1750720074) · Data from the CMS NPPES public registry.