Guillermo Diaz NP-P
About this NPIWhat this record shows.
NPI 1164975801 is registered to Guillermo Diaz NP-P, a Psychiatric/Mental Health Nurse Practitioner practising at 185 W John St # 113 in Hicksville, New York. Psychiatric/Mental Health Nurse Practitioner is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Guillermo Diaz NP-P has been enumerated in the National Provider Identifier (NPI) registry since 2016.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20170317001678Nurse PractitionerNY
- I20260107002173Nurse PractitionerCT
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Guillermo Diaz NP-P accepts. To confirm in-network status with your specific health plan, contact Guillermo Diaz NP-P directly at (646) 856-9971.
Frequently asked
Yes. NPI 1164975801 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Psychiatric/Mental Health Nurse Practitioner is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (646) 856-9971.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Guillermo Diaz NP-P is a Type-1 individual NPI.