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LIAM PATRICK MAHONEY
NPI 1407243504
Emergency Medicine in Boston, MA

Active since April 16, 2015PECOS Enrolled
1 BOSTON MEDICAL CTR PL DEPT OF, DOWLING 1 SOUTH ROOM 1322, BOSTON, MA 02118(617) 414-4929 Get Directions Write a Review

NPPES record last updated: August 21, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Liam Patrick Mahoney NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LIAM PATRICK MAHONEY (NPI 1407243504) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Rhode Island (MD17234) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Holy Family Hospital, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1407243504
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameLIAM PATRICK MAHONEY
Location Address1 BOSTON MEDICAL CTR PL DEPT OF, DOWLING 1 SOUTH ROOM 1322Boston, MA 02118-2908
Mailing Address1 Boston Medical Ctr Pl Dept Of, Dowling 1 South Room 1322Boston, MA 02118-2908 · (617) 414-4929
Phone(617) 414-4929
Sole ProprietorYes
Medical School CMSOtherGraduated 2009
Enumeration DateApril 16, 2015
Last NPPES UpdateAugust 21, 2020
NPPES CertifiedAugust 21, 2020
✔ NPI 1407243504 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in RI · MD17234✔ Licensed in MA · 278720
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1 BOSTON MEDICAL CTR PL DEPT OF, Boston, MA 02118
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Liam Patrick Mahoney is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1355656695
PECOS Enrollment IDI20190719000962, I20241213002029
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Liam Mahoney reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Jal Practice
11 mi
Emergency Medicine
800 W CUMMINGS PARK STE 6250
Woburn, MA 01801
  • Reassigned Medicare billing, Massachusetts enrollment
  • 11 clinicians in this Medicare group
NPI 1730802687 (617) 569-2112
Community Medical Associates, Inc.
26 mi
Family Medicine
25 MARSTON ST STE 301
Lawrence, MA 01841
  • Reassigned Medicare billing, Massachusetts enrollment
  • 305 clinicians in this Medicare group
NPI 1144544040 (978) 683-4000
Steward Emergency Physicians, Inc
31 mi
Emergency Medicine
200 GROTON RD
Ayer, MA 01432
  • Reassigned Medicare billing, Massachusetts enrollment
  • 290 clinicians in this Medicare group
NPI 1780971275 (978) 784-9000
Emergency Medicine Services Of Nh, LLC
39 mi
Emergency Medicine
1 PARKLAND DR
Derry, NH 03038
  • Reassigned Medicare billing, New Hampshire enrollment
  • 145 clinicians in this Medicare group
NPI 1386341444 (603) 432-1500

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
368 services359 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
142 services134 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
101 services101 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
28 services21 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
23 services22 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
21 services21 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Holy Family Hospital

Acute Care Hospitals · Methuen, MA
2/5 CMS rating
OwnershipProprietary
CMS Certification Number220080
Location70 East StreetMethuen, MA 01844 · Essex County
Emergency services Birthing friendly

Parkland Medical Center

Acute Care Hospitals · Derry, NH
5/5 CMS rating
OwnershipProprietary
CMS Certification Number300017
Location1 Parkland DriveDerry, NH 03038 · Rockingham County
Emergency services

Portsmouth Regional Hospital

Acute Care Hospitals · Portsmouth, NH
3/5 CMS rating
OwnershipProprietary
CMS Certification Number300029
Location333 Borthwick AvePortsmouth, NH 03801 · Rockingham County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARYORI CARMONA CRNA
Nurse Anesthetist, Certified Registered
1 BOSTON MEDICAL CTR PL DEPT OF, DEPARTMENT OF ANESTHESIA
BOSTON, MA 02118
Suffolk County (617) 638-6950
CARLY M. ELLIS LICSW
Social Worker (Clinical)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 414-5245
ELIZA TOWNSEND FIRN MD
Pediatrics (Pediatric Critical Care Medicine)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 638-8000
DR. BRITTANY M GOUSE MD MPH
Psychiatry & Neurology (Psychiatry)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 414-5245
MAGGIE ELIZABETH MCGEAN
Student in an Organized Health Care Education/Training Program
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 638-8000
SARAH B. PERLMAN LICSW
Social Worker (Clinical)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 414-5245
RACHEL C. DAWS LICSW
Social Worker (Clinical)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 414-5245
YVETTE LEBLANC M.S., LMHC
Counselor (Mental Health)
1 BOSTON MEDICAL CTR PL DEPT OF
BOSTON, MA 02118
Suffolk County (617) 414-5245

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Liam Mahoney's NPI number?

The NPI number for Liam Mahoney is 1407243504. It was assigned to this individual provider in the NPPES registry on April 16, 2015.

Where is Liam Mahoney located?

Liam Mahoney practices at 1 Boston Medical Ctr Pl Dept Of Dowling 1 South Room 1322, Boston, MA 02118. The listed phone number is (617) 414-4929.

What is Liam Mahoney's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Liam Mahoney enrolled in Medicare?

Yes. Liam Mahoney is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Liam Mahoney's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Liam Mahoney reassigns Medicare benefits to 4 organizations: Jal Practice (Woburn, MA), Community Medical Associates, Inc. (Lawrence, MA), Steward Emergency Physicians, Inc (Ayer, MA) and Emergency Medicine Services Of Nh, LLC (Derry, NH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Liam Mahoney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Liam Mahoney accept?

Health plans from WellSense Health Plan list Liam Mahoney as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Liam Mahoney affiliated with any hospitals?

According to CMS data, Liam Mahoney is affiliated with Holy Family Hospital, Parkland Medical Center and Portsmouth Regional Hospital.

When was this NPI record last updated?

The NPPES record for Liam Mahoney was last updated on August 21, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.