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Internal Medicine

Phillip D. Messer, DO

Works at hospitals in Milton, MA · Needham, MA · Boston, MA … · Massachusetts

Summary

Phillip D. Messer, DO (Internal Medicine) is listed by Medicare at 4 hospitals in Milton, MA, Needham, MA and Boston, MA and other places. NPI 1053549329. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Phillip D. Messer, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
17Years since medical school (graduated 2009)
University Of New England, College Of Osteo MedicineMedical school
MaleGender (as listed)
Associated Physicians of Harvard Medical Faculty Physicians at Beth IsGroup practice

Quick answers

Which hospitals does Phillip D. Messer work at?
Medicare's official clinician data lists Phillip D. Messer at 4 hospitals: Beth Israel Deaconess Hospital - Milton, Beth Israel Deaconess Hospital - Needham, Beth Israel Deaconess Medical Center and Milford Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Phillip D. Messer see patients?
Medicare's clinician data lists 1 practice location in Needham, MA. Call before your visit to confirm the address.
What is Phillip D. Messer's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Phillip D. Messer accept Medicare assignment?
Yes. Medicare's clinician data says Phillip D. Messer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Phillip D. Messer?
(781) 453-3000, as listed in official Medicare / NPI Registry data.
What is Phillip D. Messer's NPI number?
1053549329. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Phillip D. Messer works

Medicare's Facility Affiliation Data lists Phillip D. Messer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Phillip D. Messer is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Phillip D. Messer as a member of this group (CMS data updated 2026-10-02).

  • Associated Physicians of Harvard Medical Faculty Physicians at Beth Is565 clinicians in the group

Specialties

Find other Internal Medicine doctors in Massachusetts →

Other internal medicine doctors in Needham

Clinicians with the same Medicare primary specialty in Needham, MA — not a recommendation.

All internal medicine doctors in Needham →

Clinician information

CredentialDO
Medical schoolUniversity Of New England, College Of Osteo Medicine
Graduation year2009
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1053549329
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians