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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. KATHARINE KENNEDY TREADWAY MD
NPI 1417944141
Internal Medicine in Boston, MA

Active since September 27, 2005PECOS Enrolled
15 PARKMAN ST, WAC 615 INTERNAL MEDICINE ASSOCIATES TEAM 2, BOSTON, MA 02114(617) 726-2674(617) 724-0656 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Katharine Kennedy Treadway Md NPPES

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

DR. KATHARINE KENNEDY TREADWAY MD (NPI 1417944141) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (47706) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1417944141
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. KATHARINE KENNEDY TREADWAYCredential: MD
Location Address15 PARKMAN ST, WAC 615 INTERNAL MEDICINE ASSOCIATES TEAM 2Boston, MA 02114-3117
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Phone(617) 726-2674
Fax(617) 724-0656
Sole ProprietorNo
Enumeration DateSeptember 27, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1417944141 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 47706
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.
15 PARKMAN ST, Boston, MA 02114
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Other Identifiers 3

Other044706MA · Tufts Health Plan
OtherE05495MA · Bcbs Ma
Medicaid0138053MA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Katharine Kennedy Treadway Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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.

MRS. PATRICIA NOREEN FINNERAN NP-C
Nurse Practitioner (Adult Health)
15 PARKMAN ST, WAC 440
BOSTON, MA 02114
Suffolk County (617) 643-4709
MISS BRYANA CAREY PT, DPT
Physical Therapist
15 PARKMAN ST
BOSTON, MA 02114
Suffolk County (617) 643-4373
DR. WILLIAM ELLIS FALK MD
Psychiatry & Neurology (Geriatric Psychiatry)
15 PARKMAN ST, PSYCHIATRY OUTPATIENT DEPARTMENT WAC 812
BOSTON, MA 02114
Suffolk County (617) 726-5600
MRS. LILIAN DAYAN-CIMADORO PT,DPT,MS,NCS,CLT-LA
Physical Therapist (Neurology)
15 PARKMAN ST, ROOM 134
BOSTON, MA 02114
Suffolk County (617) 724-7484
MS. ANGELA MARY HAUBER DPT
Physical Therapist
15 PARKMAN ST
BOSTON, MA 02114
Suffolk County (617) 726-2962
JACKIE A MULGREW PT
Physical Therapist
15 PARKMAN ST, WACC 134
BOSTON, MA 02114
Suffolk County (617) 726-7487
MS. MARY S KNAB P.T.
Physical Therapist
15 PARKMAN ST
BOSTON, MA 02114
Suffolk County (617) 724-6398
DR. JAMES ELTON GROVES MD
Psychiatry & Neurology (Psychiatry)
15 PARKMAN ST, WAC 8 PSYCHIATRY OUTPATIENT DEPARTMENT
BOSTON, MA 02114
Suffolk County (617) 726-2714

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 Katharine Treadway's NPI number?

The NPI number for Katharine Treadway is 1417944141. It was assigned to this individual provider in the NPPES registry on September 27, 2005.

Where is Katharine Treadway located?

Katharine Treadway practices at 15 Parkman St Wac 615 Internal Medicine Associates Team 2, Boston, MA 02114. The listed phone number is (617) 726-2674.

What is Katharine Treadway's specialty?

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

Is Katharine Treadway enrolled in Medicare?

Yes. Katharine Treadway is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Katharine Treadway was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.