DR. SARAH ELIZABETH SHANNAHAN M.D.
NPI 1528470143
Internal Medicine in Boston, MA

Q: What is Sarah Shannahan's NPI number?

The NPI number for Sarah Shannahan is 1528470143. It was assigned to this individual provider in the NPPES registry on June 2, 2014.

Q: What is Sarah Shannahan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Sarah Shannahan was last updated on February 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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 02, 2014PECOS EnrolledAccepts Medicare Assignment

330 BROOKLINE AVE, BOSTON, MA 02215(617) 667-7000 Get Directions Write a Review

NPPES record last updated: February 24, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

On this page

About Dr. Sarah Elizabeth Shannahan M.d. NPPES

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

DR. SARAH ELIZABETH SHANNAHAN M.D. (NPI 1528470143) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (259668) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, is affiliated with Milford Regional Medical Center, and is a graduate of University Of Massachusetts Medical School (2014).

NPPES Registry Identity

NPI1528470143

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. SARAH ELIZABETH SHANNAHANCredential: M.D.

Location Address330 BROOKLINE AVEBoston, MA 02215-5400

Mailing Address330 Brookline AveBoston, MA 02215-5400 · (617) 667-7000

Phone(617) 667-7000

Sole ProprietorNo

Medical School CMSUniversity Of Massachusetts Medical SchoolGraduated 2014

Enumeration DateJune 2, 2014

Last NPPES UpdateFebruary 24, 2025

NPPES CertifiedFebruary 24, 2025

✔ NPI 1528470143 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 259668

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X · License 269875 (MA)

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 Anthem Blue Cross and Blue Shield.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

Dr. Sarah Elizabeth Shannahan 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 ID1951618024

PECOS Enrollment IDI20180814001859

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 Sarah Shannahan reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

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
2,579 clinicians in this Medicare group

NPI 1194765438 (617) 754-9600

Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is

Same address

Internal Medicine

330 BROOKLINE AVE, HOSPITALIST PROGRAM, PBS 2
Boston, MA 02215

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

NPI 1497151773 (617) 754-4667

Brigham & Womens Physicians Organization Inc

0.3 mi

Internal Medicine

75 FRANCIS ST
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
4,574 clinicians in this Medicare group

NPI 1033535497 (617) 732-5500

Cambridge Public Health Commission

2.4 mi

General Acute Care Hospital

1493 CAMBRIDGE ST
Cambridge, MA 02139

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

NPI 1487603585 (617) 665-1000

Gbgastro LLC

17 mi

Gastroenterology

475 FRANKLIN ST STE 110
Framingham, MA 01702

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

NPI 1033693023 (508) 620-9200

Greater Boston Gastroenterology

17 mi

Gastroenterology

475 FRANKLIN ST, SUITE 110
Framingham, MA 01702

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

NPI 1164498796 (508) 620-9200

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

204 services71 patients

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.

133 services115 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

76 services76 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

71 services68 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.

47 services42 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

39 services30 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

36 services29 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.

35 services35 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

34 services31 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

18 services17 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

14 services14 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

13 services13 patients

Hospital Affiliations CMS Care Compare 5

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

Milford Regional Medical Center

Acute Care Hospitals · Milford, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number220090

Location14 Prospect StreetMilford, MA 01757 · Worcester County

Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220101

Location2014 Washington StreetNewton, MA 02462 · Middlesex County

Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Umass Memorial Medical Center/University Campus

Acute Care Hospitals · Worcester, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220163

Location55 Lake Avenue NorthWorcester, MA 01655 · Worcester County

Emergency services Birthing friendly

Metrowest Medical Center

Acute Care Hospitals · Framingham, MA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220175

Location115 Lincoln StreetFramingham, MA 01701 · Middlesex 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

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

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 Sarah Shannahan's NPI number?

The NPI number for Sarah Shannahan is 1528470143. It was assigned to this individual provider in the NPPES registry on June 2, 2014.

Where is Sarah Shannahan located?

Sarah Shannahan practices at 330 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 667-7000.

What is Sarah Shannahan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Sarah Shannahan enrolled in Medicare?

Yes. Sarah Shannahan 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 Sarah Shannahan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sarah Shannahan reassigns Medicare benefits to 7 organizations: Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Brigham & Womens Physicians Organization Inc (Boston, MA), Cambridge Public Health Commission (Cambridge, MA) and 2 more organizations, listed in the Medicare section above. 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 Sarah Shannahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sarah Shannahan accept?

Health plans from Anthem Blue Cross and Blue Shield list Sarah Shannahan 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 Sarah Shannahan affiliated with any hospitals?

According to CMS data, Sarah Shannahan is affiliated with Milford Regional Medical Center, Newton-Wellesley Hospital, Brigham And Women's Hospital, Umass Memorial Medical Center/University Campus and Metrowest Medical Center.

When was this NPI record last updated?

The NPPES record for Sarah Shannahan was last updated on February 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.