Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Arthur C Sosis, M.D.

Dermatology Physician in Allentown, PA · enumerated 2005.

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

National Provider Identifier

1003804493

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Registry record

Entity type Individual (Type 1)

Name Dr. Arthur C Sosis

Credential M.D.

Sex Male

Practice address 1259 S Cedar Crest Blvd, Suite 100, Allentown, PA, 18103

Phone (610) 437-4134

Fax (610) 770-0993

Enumeration date Oct 10, 2005

Last updated in NPPES Aug 30, 2012

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD012271E (PA) Primary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License MD012271E (PA) Secondary

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
02343000	Other	PA	CAPITAL BLUE CROSS
172424	Other	PA	HIGHMARK

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

Is NPI 1003804493 active?

Yes, as of the latest NPPES snapshot, NPI 1003804493 is active (record last updated 2012-08-30).

How do I verify Arthur Sosis's NPI record?

Cross-check NPI 1003804493 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-30.