Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Mark Thomas Brown, MD

Individual provider Otolaryngology Physician · NPI 1023024395

Mark Thomas Brown, MD practises Otolaryngology in Concord, Massachusetts. Graduated from Baylor College of Medicine in 1989, 37 years ago. Practices with Massachusetts Eye and Ear Associates, Inc, a 410-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
37
Trained at
Baylor College of Medicine
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

54 Baker Avenue Ext Ste 303
Concord, MA 01742-2139
Phone: (978) 369-8780
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 79299 (MA)

Record details

NPI number1023024395
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 31, 2006
Last updated in NPPESNovember 16, 2022
Certification dateNovember 16, 2022

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Massachusetts Eye And Ear Associates, Inc — 410 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients659
Services billed 1,298 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Massachusetts Eye and Ear Associates, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 410 clinicians in the practice; 12 are shown here.

Other providers in Concord