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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

EDWARD M HALLOWELL M.D.
NPI 1184661365
Psychiatry & Neurology - Psychiatry in Sudbury, MA

Active since May 31, 2006Opted out of Medicare · through Jun 11, 2028
142 NORTH ROAD, THE HALLOWELL CENTER, SUDBURY, MA 01776(978) 287-0810 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Edward M Hallowell M.d. NPPES

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

EDWARD M HALLOWELL M.D. (NPI 1184661365) is an individual psychiatry provider in Sudbury, Massachusetts, licensed in Massachusetts (44431) and active in the NPI registry since May 2006. He has opted out of Medicare through June 11, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1184661365
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameEDWARD M HALLOWELLCredential: M.D.
Location Address142 NORTH ROAD, THE HALLOWELL CENTERSudbury, MA 01776
Mailing Address142 North Road, The Hallowell CenterSudbury, MA 01776 · (978) 287-0810
Phone(978) 287-0810
Sole ProprietorNo
Enumeration DateMay 31, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1184661365 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MA · 44431
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
142 NORTH ROAD, Sudbury, MA 01776
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Edward M Hallowell M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from June 11, 2018 through June 11, 2028.

Opt-Out Effective DateJune 11, 2018
Opt-Out In Effect ThroughJune 11, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01776 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
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
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.

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 Edward Hallowell's NPI number?

The NPI number for Edward Hallowell is 1184661365. It was assigned to this individual provider in the NPPES registry on May 31, 2006.

Where is Edward Hallowell located?

Edward Hallowell practices at 142 North Road The Hallowell Center, Sudbury, MA 01776. The listed phone number is (978) 287-0810.

What is Edward Hallowell's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Edward Hallowell enrolled in Medicare?

No. Edward Hallowell has opted out of Medicare through June 11, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Edward Hallowell was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days 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.