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KATHLEEN MICHELLE LEAHY M.D., MPH
NPI 1275913014
Internal Medicine - Medical Oncology in Weymouth, MA

Active since June 07, 2015PECOS EnrolledAccepts Medicare Assignment
101 COLUMBIAN ST, WEYMOUTH, MA 02190(781) 624-5000(781) 624-4840 Get Directions Write a Review

NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Kathleen Michelle Leahy M.d., Mph NPPES

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

KATHLEEN MICHELLE LEAHY M.D., MPH (NPI 1275913014) is an individual medical oncology provider in Weymouth, Massachusetts, licensed in Massachusetts (288208) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital - Needham, and is a graduate of Boston University School Of Medicine (2015).

NPPES Registry Identity

NPI1275913014
Entity TypeIndividualFemale
Primary Taxonomy207RX0202X
Provider Legal NameKATHLEEN MICHELLE LEAHYCredential: M.D., MPH
Location Address101 COLUMBIAN STWeymouth, MA 02190-1601
Mailing Address101 Columbian StWeymouth, MA 02190-1601 · (781) 624-5000 · Fax (781) 624-4840
Phone(781) 624-5000
Fax(781) 624-4840
Sole ProprietorYes
Medical School CMSBoston University School Of MedicineGraduated 2015
Enumeration DateJune 7, 2015
Last NPPES UpdateMay 20, 2026
NPPES CertifiedMay 20, 2026
✔ NPI 1275913014 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in MA · 288208
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License 288208 (MA)
101 COLUMBIAN ST, Weymouth, MA 02190
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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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Kathleen Michelle Leahy M.d., Mph 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 ID1951691690
PECOS Enrollment IDI20210724000044
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.

Areas of Expertise CMS Part B claims 5

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.
98 services80 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.
62 services56 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.
25 services21 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.
17 services17 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
13 services13 patients

Hospital Affiliations CMS Care Compare 4

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

Beth Israel Deaconess Hospital - Needham

Acute Care Hospitals · Needham, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220083
Location148 Chestnut StreetNeedham, MA 02494 · Norfolk County
Emergency services

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

South Shore Hospital

Acute Care Hospitals · South Weymouth, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220100
Location55 Fogg RoadSouth Weymouth, MA 02190 · Norfolk 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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02190 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
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
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.

LYNDSAY JEAN CAULFIELD DNP, FNP-BC
Nurse Practitioner (Family)
101 COLUMBIAN ST
SOUTH WEYMOUTH, MA 02190
Norfolk County (781) 635-6273
JENNIFER CALZARETTE PA
Physician Assistant
101 COLUMBIAN ST
SOUTH WEYMOUTH, MA 02190
Norfolk County (781) 624-5000
TEMILOLA ONABANJO MD, MPH
Internal Medicine (Medical Oncology)
101 COLUMBIAN ST
WEYMOUTH, MA 02190
Norfolk County (781) 624-5800
WILLIAM DAVENPORT POWLIS M.D.
Radiology (Radiation Oncology)
101 COLUMBIAN ST, RADIATION ONCOLOGY
SOUTH WEYMOUTH, MA 02190
Norfolk County (781) 624-4700
DR. SHAIL MAINGI MD
Internal Medicine (Hematology & Oncology)
101 COLUMBIAN ST
SOUTH WEYMOUTH, MA 02190
Norfolk County (518) 525-5634
DR. MEDHAVI GUPTA M.D.
Internal Medicine (Medical Oncology)
101 COLUMBIAN ST
WEYMOUTH, MA 02190
Norfolk County (781) 624-5000
DR. SUNITI N. NIMBKAR M.D.
Surgery
101 COLUMBIAN ST
SOUTH WEYMOUTH, MA 02190
Norfolk County (781) 624-4545
CHELSEA THERAN
Social Worker (Clinical)
101 COLUMBIAN ST
SOUTH WEYMOUTH, MA 02190
Norfolk County (781) 624-4785

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 Kathleen Leahy's NPI number?

The NPI number for Kathleen Leahy is 1275913014. It was assigned to this individual provider in the NPPES registry on June 7, 2015.

Where is Kathleen Leahy located?

Kathleen Leahy practices at 101 Columbian St, Weymouth, MA 02190. The listed phone number is (781) 624-5000.

What is Kathleen Leahy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Kathleen Leahy enrolled in Medicare?

Yes. Kathleen Leahy 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.

What insurance does Kathleen Leahy accept?

Health plans from Anthem Blue Cross and Blue Shield list Kathleen Leahy 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 Kathleen Leahy affiliated with any hospitals?

According to CMS data, Kathleen Leahy is affiliated with Beth Israel Deaconess Hospital - Needham, Beth Israel Deaconess Medical Center, South Shore Hospital and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Kathleen Leahy was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.