Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark John Piotrowski, MD

Ophthalmology Physician in Arlington Heights, IL · enumerated 2006.

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

National Provider Identifier

1417059114

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark John Piotrowski

Credential MD

Sex Male

Practice address 1100 W Central Rd, Suite 205, Arlington Heights, IL, 60005

Phone (847) 253-4040

Fax (847) 253-3028

Enumeration date Sep 2, 2006

Last updated in NPPES Mar 5, 2008

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 036108737 (IL) 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
01623492	Other	IL	BCBS
571890	Other	IL	MEDICARE GROUP NUMBER
036108737	Medicaid	IL	-
K00008	Other	IL	MEDICARE

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 Piotrowski?

The National Provider Identifier (NPI) for Mark Piotrowski is 1417059114, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Piotrowski practice?

The practice location on file with NPPES is in Arlington Heights, IL. 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 2008-03-05.