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MICHAEL ISAIAH DIAZ PA-C
NPI 1366175754
Physician Assistant in Boston, MA

Active since July 05, 2022PECOS EnrolledAccepts Medicare Assignment
75 FRANCIS ST, BOSTON, MA 02115(617) 732-5500 Get Directions Write a Review

NPPES record last updated: December 15, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 15, 2025, May 1, 2023, Jan 9, 2023 and 1 more (4 updates tracked since 2022).

About Michael Isaiah Diaz Pa-c NPPES

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

MICHAEL ISAIAH DIAZ PA-C (NPI 1366175754) is an individual physician assistant in Boston, Massachusetts, licensed in Massachusetts (PA8901) and active in the NPI registry since July 2022. He is enrolled in Medicare PECOS, is affiliated with Brigham And Women's Hospital, and maintains a secondary practice location in New York.

NPPES Registry Identity

NPI1366175754
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMICHAEL ISAIAH DIAZCredential: PA-C
Location Address75 FRANCIS STBoston, MA 02115-6110
Mailing Address75 Francis StBoston, MA 02115-6110 · (617) 732-5500
Phone(617) 732-5500
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateJuly 5, 2022
Last NPPES UpdateDecember 15, 20254 updates tracked since enumeration
NPPES CertifiedDecember 15, 2025
✔ NPI 1366175754 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Licenses✔ Licensed in MA · PA8901✔ Licensed in NY · 028796
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
75 FRANCIS ST, Boston, MA 02115
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Secondary Practice Location 1

Location 11468 Madison AveNew York, NY 10029-6508 · Phone (212) 241-6500

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

Michael Isaiah Diaz Pa-c 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 ID9436520921
PECOS Enrollment IDI20230119002830
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.

Hospital Affiliations CMS Care Compare

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

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 02115 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
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
Most-billed visit code 99213
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.

RUMA RAJBHANDARI
Internal Medicine (Gastroenterology)
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 525-6841
WENYA LINDA BI
Neurological Surgery
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (203) 645-9485
CHI YUEN CHAN M.D.
Student in an Organized Health Care Education/Training Program
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-5500
JENNIFER MICHELLE THOMAS MD
Radiology (Diagnostic Radiology)
75 FRANCIS ST, DEPARTMENT OF RADIOLOGY
BOSTON, MA 02115
Suffolk County (617) 732-6248
GAURAV SHARMA M.D.
Surgery (Vascular Surgery)
75 FRANCIS ST, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Suffolk County (951) 259-0890
YEU-SHIN CINDY CHANG M.D., M.P.H.
Emergency Medicine
75 FRANCIS ST, BWH DEPT. OF EMERGENCY MEDICINE
BOSTON, MA 02115
Suffolk County (617) 732-8070
CARA L RICHARDS
Physician Assistant
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-5500
LARA COAKLEY
Nurse Practitioner (Family)
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-5500

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 Michael Diaz's NPI number?

The NPI number for Michael Diaz is 1366175754. It was assigned to this individual provider in the NPPES registry on July 5, 2022.

Where is Michael Diaz located?

Michael Diaz practices at 75 Francis St, Boston, MA 02115. The listed phone number is (617) 732-5500.

What is Michael Diaz's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Michael Diaz enrolled in Medicare?

Yes. Michael Diaz 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.

Is Michael Diaz affiliated with any hospitals?

According to CMS data, Michael Diaz is affiliated with Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Michael Diaz was last updated on December 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.