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DR. GUILLERMO VALDES MONTEMAYOR M.D., M.B.A
NPI 1396028767
Psychiatry & Neurology - Child & Adolescent Psychiatry in New York, NY

Active since September 22, 2011PECOS Enrolled
180 WEST END AVENUE, SUITE 1A, NEW YORK, NY 10023(917) 789-1422(917) 464-9897 Get Directions Write a Review

NPPES record last updated: April 24, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Guillermo Valdes Montemayor M.d., M.b.a NPPES

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

DR. GUILLERMO VALDES MONTEMAYOR M.D., M.B.A (NPI 1396028767) is an individual child & adolescent psychiatry provider in New York, New York, licensed in New York (280656) and active in the NPI registry since September 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396028767
Entity TypeIndividualMale
Primary Taxonomy2084P0804X
Provider Legal NameDR. GUILLERMO VALDES MONTEMAYORCredential: M.D., M.B.A
Location Address180 WEST END AVENUE, SUITE 1ANew York, NY 10023
Mailing Address180 West End Avenue, Suite 1aNew York, NY 10023 · (917) 789-1422 · Fax (917) 464-9897
Phone(917) 789-1422
Fax(917) 464-9897
Sole ProprietorYes
Enumeration DateSeptember 22, 2011
Last NPPES UpdateApril 24, 2018
✔ NPI 1396028767 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
License✔ Licensed in NY · 280656
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.
180 WEST END AVENUE, New York, NY 10023
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Other Names 1

Professional Name (2)Dr. Guillermo Valdes M.d., M.b.a.

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Guillermo Valdes Montemayor M.d., M.b.a 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 Guillermo Valdes Montemayor reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Park Slope Center For Mental Health, Inc
7.7 mi
Mental Health (Including Community Mental Health Center)
348 13TH ST, SUITE 203
Brooklyn, NY 11215
  • Reassigned Medicare billing, New York enrollment
  • 30 clinicians in this Medicare group
NPI 1851382188 (718) 788-2461

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

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. YOUNG-SOOK HAN PHD
Psychologist
180 WEST END AVENUE, SUITE 1-A
NEW YORK, NY 10023
New York County (212) 362-4532

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 Guillermo Valdes Montemayor's NPI number?

The NPI number for Guillermo Valdes Montemayor is 1396028767. It was assigned to this individual provider in the NPPES registry on September 22, 2011. The provider is also known as Dr. Guillermo Valdes M.D., M.B.A..

Where is Guillermo Valdes Montemayor located?

Guillermo Valdes Montemayor practices at 180 West End Avenue Suite 1A, New York, NY 10023. The listed phone number is (917) 789-1422.

What is Guillermo Valdes Montemayor's specialty?

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

Is Guillermo Valdes Montemayor enrolled in Medicare?

Yes. Guillermo Valdes Montemayor is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Guillermo Valdes Montemayor's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Valdes Montemayor reassigns Medicare benefits to Park Slope Center For Mental Health, Inc (Brooklyn, NY). 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 Guillermo Valdes Montemayor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Guillermo Valdes Montemayor was last updated on April 24, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.