Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lewis J Kass, MD

Q: What is the NPI number for Lewis Kass?

The National Provider Identifier (NPI) for Lewis Kass is 1154317741, a Type 1 (individual) record in the CMS NPPES registry.

Pediatric Pulmonology Physician in Philadelphia, PA · enumerated 2005.

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

National Provider Identifier

1154317741

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Registry record

Entity type Individual (Type 1)

Name Lewis J Kass

Credential MD

Sex Male

Practice address Philadelphia, PA, 19134

Phone (484) 628-1324

Enumeration date Sep 20, 2005

Last updated in NPPES Oct 17, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2080P0214X Pediatric Pulmonology Physician Allopathic & Osteopathic Physicians · License 35544 (CT) Secondary

2080P0214X Pediatric Pulmonology Physician Allopathic & Osteopathic Physicians · License 191964 (NY) Secondary

2080P0214X Pediatric Pulmonology Physician Allopathic & Osteopathic Physicians · License MD482821 (PA) Primary

2080S0012X Pediatric Sleep Medicine Physician Allopathic & Osteopathic Physicians · License MD482821 (PA) Secondary

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

Where does Lewis Kass practice?

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

What is the NPI number for Lewis Kass?

The National Provider Identifier (NPI) for Lewis Kass is 1154317741, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-17.