BARBARA A MASSER M.D.
NPI 1205873916
Emergency Medicine in Boston, MA

Q: What is Barbara Masser's NPI number?

The NPI number for Barbara Masser is 1205873916. It was assigned to this individual provider in the NPPES registry on June 1, 2006.

Q: What is Barbara Masser's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Barbara Masser was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.

Active since June 01, 2006PECOS EnrolledAccepts Medicare Assignment

330 BROOKLINE AVE, BETH ISRAEL DEACONESS MEDICAL CTR, BOSTON, MA 02215(617) 754-2347 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Barbara A Masser M.d. NPPES

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

BARBARA A MASSER M.D. (NPI 1205873916) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (160235) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Mount Auburn Hospital, and is a graduate of Other (1997).

NPPES Registry Identity

NPI1205873916

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameBARBARA A MASSERCredential: M.D.

Location Address330 BROOKLINE AVE, BETH ISRAEL DEACONESS MEDICAL CTRBoston, MA 02215-5400

Mailing Address166 Nason Hill RdSherborn, MA 01770-1230 · (617) 754-2347

Phone(617) 754-2347

Sole ProprietorNo

Medical School CMSOtherGraduated 1997

Enumeration DateJune 1, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1205873916 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in MA · 160235

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.

330 BROOKLINE AVE, Boston, MA 02215

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Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Barbara A Masser M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID749290518

PECOS Enrollment IDI20060425000510

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

Medicare enrollment records show Barbara Masser reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is

Same address

Multi-Specialty

330 BROOKLINE AVE
Boston, MA 02215

Reassigned Medicare billing, Massachusetts enrollment
Also billed through NPI 1952358533 (Massachusetts)
1,006 clinicians in this Medicare group

NPI 1861216038 (617) 667-2906

Beth Israel Deaconess Medical Center, Inc.

Same address

General Acute Care Hospital

330 BROOKLINE AVE, ST 207
Boston, MA 02215

Reassigned Medicare billing, Massachusetts enrollment
1,477 clinicians in this Medicare group

NPI 1548202641 (617) 667-1961

Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc

Same address

Internal Medicine

330 BROOKLINE AVE
Boston, MA 02215

Reassigned Medicare billing, Massachusetts enrollment
Also billed through NPI 1316987993 (Massachusetts)
2,579 clinicians in this Medicare group

NPI 1194765438 (617) 754-9600

Bid-Milton Physician Associates Inc

6.3 mi

Behavior Analyst

100 HIGHLAND ST STE 126
Milton, MA 02186

Reassigned Medicare billing, Massachusetts enrollment
177 clinicians in this Medicare group

NPI 1184312738 (617) 313-1440

Steward Emergency Physicians, Inc

29 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

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 12

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

102 services100 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

49 services49 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

47 services47 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

44 services44 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

36 services36 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

33 services33 patients

Blood test panel for electrolytes (sodium potassium, chloride, carbon dioxide) 80051

A blood test panel for electrolytes checks the levels of sodium, potassium, chloride, and carbon dioxide in your blood. These elements are crucial for body functions such as maintaining fluid balance, muscle contractions, and heart rhythm. The test helps identify any imbalances.

17 services17 patients

Blood creatinine level 82565

A blood creatinine level test measures the amount of creatinine in your blood. Creatinine is a waste product that your body produces when it uses energy. High levels may indicate that your kidneys aren't working properly. This test is often used to monitor kidney health.

17 services17 patients

Urea nitrogen level to assess kidney function, quantitative 84520

The urea nitrogen level test is a routine blood test that checks the amount of urea nitrogen in your blood to evaluate how well your kidneys are working. If the levels are higher than normal, it may indicate that your kidneys are not functioning properly.

17 services17 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

16 services16 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

15 services15 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

12 services12 patients

Hospital Affiliations CMS Care Compare 2

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

Mount Auburn Hospital

Acute Care Hospitals · Cambridge, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220002

Location330 Mount Auburn StreetCambridge, MA 02138 · Middlesex County

Emergency services Birthing friendly

Beth Israel Deaconess Medical Center

Acute Care Hospitals · Boston, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220086

Location330 Brookline AvenueBoston, MA 02215 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02215 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 20

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

BETH ISRAEL DEACONESS MEDICAL CENTER

Chronic Disease Hospital (Children)

330 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 677-4042

DR. BRIAN DANIEL HOBBS MD, MMSC

Internal Medicine

330 BROOKLINE AVE, PULMONARY AND CRITICAL CARE DEPARTMENT
BOSTON, MA 02215

Suffolk County (617) 667-5864

ERICA DOMMASCH MD

Dermatology

330 BROOKLINE AVE, SHAPIRO 2
BOSTON, MA 02215

Suffolk County (617) 667-3753

VAHID KIARAD M.D

Anesthesiology

330 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 667-7000

DR. MICHAEL R GOLDSTEIN PHD

Psychologist (Clinical)

330 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 356-7246

SARA MURDOCK CAHILL MD

Hospitalist

330 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 667-7000

DR. DEVON ABT HARRIS MD

Obstetrics & Gynecology (Gynecologic Oncology)

330 BROOKLINE AVE, KIRSTEIN 3
BOSTON, MA 02215

Suffolk County (617) 667-3736

DR. ELIZABETH MAIER BALOUGH MD, PHD

Student in an Organized Health Care Education/Training Program

330 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 667-7000

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 Barbara Masser's NPI number?

The NPI number for Barbara Masser is 1205873916. It was assigned to this individual provider in the NPPES registry on June 1, 2006.

Where is Barbara Masser located?

Barbara Masser practices at 330 Brookline Ave Beth Israel Deaconess Medical Ctr, Boston, MA 02215. The listed phone number is (617) 754-2347.

What is Barbara Masser's specialty?

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

Is Barbara Masser enrolled in Medicare?

Yes. Barbara Masser is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Barbara Masser's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Barbara Masser reassigns Medicare benefits to 5 organizations: Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Bid-Milton Physician Associates Inc (Milton, MA) and Steward Emergency Physicians, Inc (Ayer, MA). 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 Barbara Masser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Barbara Masser accept?

Health plans from Taro Health list Barbara Masser 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 Barbara Masser affiliated with any hospitals?

According to CMS data, Barbara Masser is affiliated with Mount Auburn Hospital and Beth Israel Deaconess Medical Center.

When was this NPI record last updated?

The NPPES record for Barbara Masser was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.