Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Stephen Mark Block, NCGC II

Counselor in Brooklyn, NY · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1215241443

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Registry record

Entity type Individual (Type 1)

Name Mr. Stephen Mark Block

Credential NCGC II

Sex Male

Practice address 255 Avenue W, Brooklyn, NY, 11223

Phone (866) 569-7233

Fax (718) 336-6815

Enumeration date Jul 29, 2010

Last updated in NPPES Jul 29, 2010

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License 162 (DC) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Stephen Block?

Stephen Block is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-29.