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Alessandra Marie Sadler Andersen, MD

Pediatric Emergency Medicine (Pediatrics) Physician in Worcester, MA · enumerated 2023.

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

National Provider Identifier

1437841350

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Registry record

Entity type Individual (Type 1)
Name Alessandra Marie Sadler Andersen
Credential MD
Sex Female
Practice address 55 Lake Ave N, Worcester, MA, 01655
Phone (508) 334-1000
Enumeration date May 22, 2023
Last updated in NPPES Jun 29, 2026

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 3014333 (MA) Secondary
2080P0204X Pediatric Emergency Medicine (Pediatrics) Physician Allopathic & Osteopathic Physicians · License 1028026 (MA) Primary
207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 1028026 (MA) 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.

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Frequently asked questions

What specialty is Alessandra Sadler Andersen?
Alessandra Sadler Andersen is registered in NPPES with the primary taxonomy of Pediatric Emergency Medicine (Pediatrics) Physician. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-29.