Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Sebastian Maleszewski
Chiropractor in Upper Darby, PA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1245104272
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Registry record
Entity type Individual (Type 1)
Name Dr. Sebastian Maleszewski
Sex Male
Practice address 32 Garrett Rd, Upper Darby, PA, 19082
Phone (610) 352-8812
Enumeration date Oct 2, 2025
Last updated in NPPES Oct 2, 2025
Taxonomy & licenses
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.
Frequently asked questions
What specialty is Sebastian Maleszewski?
Sebastian Maleszewski is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Angelo Karakasis Rehabilitation Chiropractor · Upper Darby, PA NPI 1194898312 Apex Medical and Rehab, P.C. General Practice Physician · Upper Darby, PA NPI 1336363167 Donovan Brown Rehabilitation Chiropractor · Upper Darby, PA NPI 1447464250 Hyoung Chea Rehabilitation Chiropractor · Upper Darby, PA NPI 1508075623 Barun Spine and Chiropractic Inc Health Maintenance Organization · Upper Darby, PA NPI 1568625697
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-02.