Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Michael Casey Flanagan, MD

Individual provider Internal Medicine Physician · NPI 1275516320

Dr. Michael Casey Flanagan, MD is an Advanced Heart Failure and Transplant Cardiology in Falls Church, Virginia. Graduated from Temple University School of Medicine in 2004, 22 years ago. Practices with Mary Washington Hospital Inc, a 53-clinician group, works from 8 locations and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
22
Trained at
Temple University School of Medicine
Licensed in
VA
In the registry since
2005
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3300 Gallows Rd
Falls Church, VA 22042-3300
Phone: (703) 776-4001
Fax: (703) 776-7113
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (7)

  • 8901 Wisconsin Ave Cardiology Department, Bethesda, MD 20889-5600 — (301) 295-0390
  • 1600 N Beauregard St Ste 150, Alexandria, VA 22311-1732 — (703) 776-6453
  • 2501 Parkers Ln, Alexandria, VA 22306-3209 — (703) 664-7000
  • 1005 N Glebe Rd Ste 750, Arlington, VA 22201-5766 — (703) 524-7202
  • 21785 Filigree Ct Ste 203, Ashburn, VA 20147-6214 — (703) 933-2820
  • 8081 Innovation Park Dr Ste 700, Fairfax, VA 22031-4867 — (571) 472-2900
  • 2901 Telestar Ct Ste 200, Falls Church, VA 22042-1262 — (703) 573-3494

Specialties & licences

Advanced Heart Failure and Transplant Cardiology Physician (primary) Taxonomy 207RA0001X · Licence 0101238627 (VA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0101238627 (VA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 0101238627 (VA)

Record details

NPI number1275516320
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 22, 2005
Last updated in NPPESOctober 25, 2021
Certification dateOctober 25, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyADVANCED HEART FAILURE AND TRANSPLANT CARDIOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolTEMPLE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Mary Washington Hospital Inc — 53 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations9 on file with Medicare

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