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DR. WILLIAM ZACHARY BARNARD M.D.
NPI 1194016345
Psychiatry & Neurology - Psychiatry in Sudbury, MA

Active since April 22, 2011Opted out of Medicare · through Oct 1, 2026
322 BOSTON POST RD # 208, SUDBURY, MA 01776(508) 504-7961(513) 880-0896 Get Directions Write a Review

NPPES record last updated: July 6, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 6, 2021, Jul 10, 2020 (2 updates tracked since 2020).

About Dr. William Zachary Barnard M.d. NPPES

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

DR. WILLIAM ZACHARY BARNARD M.D. (NPI 1194016345) is an individual psychiatry provider in Sudbury, Massachusetts, licensed in Massachusetts (248950) and active in the NPI registry since April 2011. He has opted out of Medicare through October 1, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1194016345
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. WILLIAM ZACHARY BARNARDCredential: M.D.
Location Address322 BOSTON POST RD # 208Sudbury, MA 01776-3007
Mailing Address322 Boston Post Rd # 208Sudbury, MA 01776-3007 · (508) 504-7961 · Fax (513) 880-0896
Phone(508) 504-7961
Fax(513) 880-0896
Sole ProprietorYes
Enumeration DateApril 22, 2011
Last NPPES UpdateJuly 6, 20212 updates tracked since enumeration
NPPES CertifiedJuly 6, 2021
✔ NPI 1194016345 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 · 248950
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.
322 BOSTON POST RD # 208, 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

ⓘ

Opted out of Medicare

Dr. William Zachary Barnard 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 October 1, 2020 through October 1, 2026.

Opt-Out Effective DateOctober 1, 2020
Opt-Out In Effect ThroughOctober 1, 2026Opt-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 William Barnard's NPI number?

The NPI number for William Barnard is 1194016345. It was assigned to this individual provider in the NPPES registry on April 22, 2011.

Where is William Barnard located?

William Barnard practices at 322 Boston Post Rd # 208, Sudbury, MA 01776. The listed phone number is (508) 504-7961.

What is William Barnard's specialty?

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

Is William Barnard enrolled in Medicare?

No. William Barnard has opted out of Medicare through October 1, 2026. 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 William Barnard was last updated on July 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.