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

Mark Layer, MD

Individual provider Emergency Medicine Physician · NPI 1033539655

Mark Layer, MD practises Emergency Medicine in Boston, Massachusetts. Qualified in 2014, 12 years ago. Practices with Associated Physicians of Harvard Medical Faculty Physicians at Beth Is, a 558-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
12
Licensed in
MA
In the registry since
2014
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

1 Deaconess Rd # CC2
Boston, MA 02215
Phone: (617) 754-2339
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 270407 (MA)

Record details

NPI number1033539655
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 22, 2014
Last updated in NPPESMay 14, 2018

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is — 558 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients252
Services billed 337 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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 Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 558 clinicians in the practice; 12 are shown here.

Other providers in Boston