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

Dr. Brian Joseph Masterson, MD, MPH

Individual provider Internal Medicine Physician · NPI 1225062383

Dr. Brian Joseph Masterson, MD, MPH is an Internal Medicine in Fairfax, Virginia. Graduated from Harvard Medical School in 1988, 38 years ago. Practices with Axis Healthcare Group, a 74-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in Iowa.

Years since qualifying
38
Trained at
Harvard Medical School
Licensed in
IA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MPH — Master of Public Health
A graduate degree in population health.

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Practice location Address checks out

3580 Joseph Siewick Dr Ste 306
Fairfax, VA 22033-1764
Phone: (703) 391-4520
Fax: (703) 391-4521
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 7945 Macarthur Blvd Ste 214, Cabin John, MD 20818-1634 — (301) 987-7284
  • 19801 Observation Dr, Germantown, MD 20876-4070 — (202) 360-4787

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 29293 (IA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 29293 (IA)

Record details

NPI number1225062383
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MPH
Sole proprietorYes
NPI enumeratedJuly 11, 2006
Last updated in NPPESAugust 19, 2024
Certification dateAugust 19, 2024
Mailing address3580 Joseph Siewick Dr Ste 306, Fairfax, VA 22033-1764

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC PSYCHIATRY, NEUROLOGY, NEUROPSYCHIATRY, PREVENTIVE MEDICINE
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1988 (38 years in practice)
Group practice Axis Healthcare Group — 74 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Fairfax