Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark I Block, MD

Q: What is the NPI number for Mark Block?

The National Provider Identifier (NPI) for Mark Block is 1720071228, a Type 1 (individual) record in the CMS NPPES registry.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Hollywood, FL · enumerated 2005.

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

National Provider Identifier

1720071228

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Registry record

Entity type Individual (Type 1)

Name Mark I Block

Credential MD

Sex Male

Practice address 1150 N 35th Ave Ste 660, Hollywood, FL, 33021

Phone (954) 265-1125

Fax (954) 985-5578

Enumeration date Aug 30, 2005

Last updated in NPPES Mar 16, 2021

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License ME91707 (FL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
271273300	Medicaid	FL	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Block?

The National Provider Identifier (NPI) for Mark Block is 1720071228, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Block practice?

The practice location on file with NPPES is in Hollywood, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-16.