DR. CLEMENT J GRASSI (M.D.) – Diagnostic Radiology Physician, NPI 1407808686

DR. CLEMENT J GRASSI (M.D.) is a healthcare provider. based in Boston, Massachusetts. specializing in Diagnostic Radiology Physician. They hold the professional credentials M.D.. They hold a License No. 50122 (MA). The NPI Number for DR. CLEMENT J GRASSI (M.D.) is 1407808686

Main info

Male
46 Years Of Experience
Accepts Medicare Assignment
Name
DR. CLEMENT J GRASSI (M.D.)
NPI
1407808686
Phone
(617) 636-5000
Address
800 WASHINGTON ST
Enumeration Date
16 May 2006
Last Update Date
23 February 2024

Doctor Profile

Medical School Name
TUFTS UNIVERSITY SCHOOL OF MEDICINE
Secondary Phone
9787500300
Graduation Year
1980 (46 years ago)
PAC ID
7810944303
Group Practice PAC ID
6709809585
Professional Enrollment ID
I20050406001013
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience64
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for DR. CLEMENT J GRASSI (M.D.)

  • Tufts Medical Center, 800, Washington Street, Chinatown, Financial District, Boston, Suffolk County, Massachusetts, 02111, United States

    BOSTON, MA 021111552

    Phone: (617) 636-5000

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 2 Open Payments records for all available years, with a total value of $1,809.

Total Amount is formed as General ($1,809) + Research ($0) + Ownership ($0) = $1,809.

Last reported payment date: 2024-11-26 • Largest payer in this snapshot: Bard Peripheral Vascular, Inc. ($1,750).

Total Amount

$1,809

General + Research + Ownership

Payments

2

Total payment records

General Amount

$1,809

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2024-11-26

Latest reported date

Top Companies

Largest payers in this snapshot

View all Open Payments →|Open Payments Risk Radar →

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
71046X-ray of chest, 2 views1616$0
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Insurance plans in this area (ZIP 02111)

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Provider's Procedures

DR. CLEMENT J GRASSI (M.D.) performs procedures in Diagnostic Radiology Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
DIAGNOSTIC RADIOLOGYMA71010X-ray of chest, 1 view, front5252

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 6709809585View full group profile
NameSpecialtyState
Gastroenterology, Diagnostic RadiologyMA
-MA
Pathology, Addiction MedicineMA
Family PracticeCA
Internal MedicineMA
Internal MedicineMA
Internal MedicineMA
Internal MedicineMA
Family PracticeMA
Internal MedicineMA

Reviews

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Frequently asked questions

How do payers reference DR. CLEMENT J GRASSI (M.D.)?
For DR. CLEMENT J GRASSI (M.D.), use NPI 1407808686 as the unique 10-digit identifier.
Is there an active status for DR. CLEMENT J GRASSI (M.D.)?
For scheduling context, DR. CLEMENT J GRASSI (M.D.) is shown as active in the registry.
What expertise is attributed to DR. CLEMENT J GRASSI (M.D.)?
DR. CLEMENT J GRASSI (M.D.)'s specialty line reads Diagnostic Radiology Physician. Clinical services aligned with this taxonomy classification.
Is DR. CLEMENT J GRASSI (M.D.) located near Boston?
DR. CLEMENT J GRASSI (M.D.) currently maps to Boston, Massachusetts in this extract.
Does inactive status remove historical data?
Historical rows can remain visible after status changes — read the dates carefully.

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