DR. ROBERT PATRICK WILLIAMSON (MD) – Internal Medicine Physician, NPI 1821068305

DR. ROBERT PATRICK WILLIAMSON (MD) is a healthcare provider. based in Wilmington, Massachusetts. specializing in Internal Medicine Physician. They hold the professional credentials MD. They hold a License No. 51661 (MA). The NPI Number for DR. ROBERT PATRICK WILLIAMSON (MD) is 1821068305

Main info

Male
46 Years Of Experience
Accepts Medicare Assignment
Name
DR. ROBERT PATRICK WILLIAMSON (MD)
NPI
1821068305
Phone
(781) 729-1368
Address
500 SALEM STREET
Enumeration Date
25 January 2006
Last Update Date
23 March 2017

Doctor Profile

Medical School Name
OTHER
Secondary Phone
7817567800
Graduation Year
1980 (46 years ago)
PAC ID
3870588361
Group Practice PAC ID
4486540994
Professional Enrollment ID
I20040415000345
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience54
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for DR. ROBERT PATRICK WILLIAMSON (MD)

  • 500, Salem Street, Wilmington, Middlesex County, Massachusetts, 01864-1298, United States

    WILMINGTON, MA 01887

    Phone: (781) 729-1368

    Fax: (781) 396-1620

    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.

This can happen when there are no reportable CMS Open Payments records.

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 ·

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

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

Insurance plans in this area (ZIP 01887)

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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

Reviews

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Frequently asked questions

What NPI should I save for DR. ROBERT PATRICK WILLIAMSON (MD)?
Save NPI 1821068305 if you need a stable reference for DR. ROBERT PATRICK WILLIAMSON (MD).
Is DR. ROBERT PATRICK WILLIAMSON (MD)'s NPI currently valid?
The extract we use shows DR. ROBERT PATRICK WILLIAMSON (MD) as active.
Does DR. ROBERT PATRICK WILLIAMSON (MD) list a primary specialty?
If you are matching referrals, note Internal Medicine Physician for DR. ROBERT PATRICK WILLIAMSON (MD). Clinical services aligned with this taxonomy classification.
What location shows for DR. ROBERT PATRICK WILLIAMSON (MD)?
We surface Wilmington, Massachusetts for DR. ROBERT PATRICK WILLIAMSON (MD) based on available NPPES addresses.
How can I contact DR. ROBERT PATRICK WILLIAMSON (MD)?
Phone or fax may appear on the official NPI record when supplied — verify before relying on them.

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