NPI Portal NPI Lookup & Verification

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

Dr. George Isajiw, M.D.

Internal Medicine Physician in Lansdowne, PA · enumerated 2006.

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

National Provider Identifier

1861509135

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. George Isajiw
Credential M.D.
Sex Male
Practice address Lansdowne, PA, 19050
Phone (610) 626-4397
Enumeration date Aug 24, 2006
Last updated in NPPES Oct 31, 2013

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD012611E (PA) Primary
311Z00000X Custodial Care Facility Nursing & Custodial Care Facilities · License MD012611E (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 George Isajiw practice?
The practice location on file with NPPES is in Lansdowne, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for George Isajiw?
The National Provider Identifier (NPI) for George Isajiw is 1861509135, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-31.