BILLY J ZOU M.D.
NPI 1538517172
Psychiatry & Neurology - Child & Adolescent Psychiatry in Boston, MA

Q: What is Billy Zou's NPI number?

The NPI number for Billy Zou is 1538517172. It was assigned to this individual provider in the NPPES registry on May 24, 2016.

Q: What is Billy Zou's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Q: When was this NPI record last updated?

The NPPES record for Billy Zou was last updated on March 31, 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.

Active since May 24, 2016PECOS Enrolled

300 LONGWOOD AVE UNIT 2009, BOSTON, MA 02115(617) 355-6000 Get Directions Write a Review

NPPES record last updated: March 31, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Billy J Zou M.d. NPPES

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

BILLY J ZOU M.D. (NPI 1538517172) is an individual child & adolescent psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (286079) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1538517172

Entity TypeIndividualMale

Primary Taxonomy2084P0804X

Provider Legal NameBILLY J ZOUCredential: M.D.

Location Address300 LONGWOOD AVE UNIT 2009Boston, MA 02115-5724

Mailing Address300 Longwood AveBoston, MA 02115-5724 · (617) 355-6000

Phone(617) 355-6000

Sole ProprietorYes

Enumeration DateMay 24, 2016

Last NPPES UpdateMarch 31, 2021

NPPES CertifiedMarch 31, 2021

✔ NPI 1538517172 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0804X

License✔ Licensed in MA · 286079

Definition

Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License 2674073 (MA)

300 LONGWOOD AVE UNIT 2009, Boston, MA 02115

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Billy J Zou M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Billy Zou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Richmond Psychiatry Group Practice

Same address

Child & Adolescent Psychiatry

300 LONGWOOD AVE
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
86 clinicians in this Medicare group

NPI 1629148036 (617) 355-4831

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Billy Zou's NPI number?

The NPI number for Billy Zou is 1538517172. It was assigned to this individual provider in the NPPES registry on May 24, 2016.

Where is Billy Zou located?

Billy Zou practices at 300 Longwood Ave Unit 2009, Boston, MA 02115. The listed phone number is (617) 355-6000.

What is Billy Zou's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Billy Zou enrolled in Medicare?

Yes. Billy Zou is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Billy Zou's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Billy Zou reassigns Medicare benefits to Richmond Psychiatry Group Practice (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Billy Zou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Billy Zou accept?

Health plans from Anthem Blue Cross and Blue Shield list Billy Zou as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Billy Zou was last updated on March 31, 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.