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

Liam Patrick Mahoney

Individual provider Emergency Medicine Physician · NPI 1407243504

Liam Patrick Mahoney practises Emergency Medicine in Boston, Massachusetts. Qualified in 2009, 17 years ago. Practices with Emergency Medicine Services of Nh, LLC, a 64-clinician group and offers telehealth. Licensed in Massachusetts and Rhode Island.

Years since qualifying
17
Licensed in
MA, RI
In the registry since
2015
Specialties on file
3
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Practice location Address checks out

1 Boston Medical Ctr Pl Dept OF Dowling 1 South Rm 1322
Boston, MA 02118-2908
Phone: (617) 414-4929
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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 MD17234 (RI)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 278720 (MA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1407243504
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 16, 2015
Last updated in NPPESAugust 21, 2020
Certification dateAugust 21, 2020

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Emergency Medicine Services Of Nh, Llc — 64 clinicians
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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 patients544
Services billed 758 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $438 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Holy Family Hospital Hospital · Methuen, MA · listed as Caritas Holy Family Hospital Inc
  • Parkland Medical Center Hospital · Derry, NH
  • Portsmouth Regional Hospital Hospital · Portsmouth, NH

Colleagues at Emergency Medicine Services of Nh, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 64 clinicians in the practice; 12 are shown here.

Other providers in Boston