BRIAN JOHN CASSERLY (MD) – Internal Medicine Physician, NPI 1366516080

Internal Medicine Physician

BRIAN JOHN CASSERLY (MD) is a healthcare provider. based in Reading, Massachusetts. specializing in Internal Medicine Physician. They hold the professional credentials MD. They hold a License No. 45753 (MA). The NPI Number for BRIAN JOHN CASSERLY (MD) is 1366516080

Main info

Male

48 Years Of Experience

Accepts Medicare Assignment

Name

BRIAN JOHN CASSERLY (MD)

NPI

1366516080

Phone

(781) 944-0040

Address

20 PONDMEADOW DR

Enumeration Date

17 November 2006

Last Update Date

14 August 2013

Doctor Profile

Medical School Name

GEORGETOWN UNIVERSITY SCHOOL OF MEDICINE

Secondary Phone

9786641990

Graduation Year

1978 (48 years ago)

PAC ID

4981890472

Group Practice PAC ID

4486540994

Professional Enrollment ID

I20101123000595

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience52

Completeness75

Years active:19State licenses:1Digital endpointsOther names

Provider Addresses for BRIAN JOHN CASSERLY (MD)

20 PONDMEADOW DR
READING, MA 01867
Phone: (781) 944-0040
Fax: (781) 944-1684
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)

No Open Payments data available for this provider.

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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.

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Medicare Utilization (FFS)

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

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No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 01867)

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Provider's Procedures

BRIAN JOHN CASSERLY (MD) performs procedures in Internal Medicine Physician. See the list of HCPCS codes below.

Specialty	Practice State	HCPCS Code	Description	Service Count	Beneficiary Count
INTERNAL MEDICINE	MA	90670	Pneumococcal vaccine for injection into muscle	69	69

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: 4486540994View full group profile

Name	Specialty	State
VICTOR KIM (M.D.)	-	MA
Unknown Individual	-	MA
MEAGHAN EMILY WHEELER (PA-C)	-	MA
TAMARIE WHEAT	-	MA
TAN DIEM PHAM (MD)	-	MA
KATHLEEN M SLOPER (NP)	-	MA
MICHAEL HENRY BRESNAHAN (MD)	-	MA
JODY NAIMARK (M.D.)	-	MA
MALORIE BARTLETT (MSN, APRN, FNP-C)	-	MA
JOEL SOLOMON (M.D.)	-	MA

Reviews

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Frequently asked questions

Is BRIAN JOHN CASSERLY (MD) listed with a National Provider Identifier?

Yes — BRIAN JOHN CASSERLY (MD) has NPI 1366516080 on file in the registry.

Is BRIAN JOHN CASSERLY (MD) shown as active in public data?

Registry records indicate BRIAN JOHN CASSERLY (MD) maintains an active NPI.

What kind of doctor is BRIAN JOHN CASSERLY (MD)?

BRIAN JOHN CASSERLY (MD) is associated with Internal Medicine Physician in the directory — Clinical services aligned with this taxonomy classification.

Is BRIAN JOHN CASSERLY (MD) located near Reading?

BRIAN JOHN CASSERLY (MD) currently maps to Reading, Massachusetts in this extract.

What does 2 location(s) imply?

2 practice locations appear in the available data.