Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nicholas M Difilippo, DO

Pulmonary Disease Physician in Oak Lawn, IL · enumerated 2006 · practices at Internal Medicine Pulmonary Diseases Ltd.

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

National Provider Identifier

1902960636

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Registry record

Entity type Individual (Type 1)

Name Dr. Nicholas M Difilippo

Credential DO

Sex Male

Practice address 9500 S 50th Court, Oak Lawn, IL, 60453

Phone (708) 424-6450

Fax (708) 424-6371

Enumeration date Dec 20, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 Nicholas Difilippo?

The National Provider Identifier (NPI) for Nicholas Difilippo is 1902960636, a Type 1 (individual) record in the CMS NPPES registry.

Where does Nicholas Difilippo practice?

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

Other providers at this practice address

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Internal Medicine Pulmonary Diseases Ltd Pulmonary Disease Physician · Oak Lawn, IL NPI 1396926036

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.