Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandra Charrow, M.D.

Dermatology Physician in Boston, MA · enumerated 2014.

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

National Provider Identifier

1679986830

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Registry record

Entity type Individual (Type 1)

Name Alexandra Charrow

Credential M.D.

Sex Female

Practice address 221 Longwood Ave, Boston, MA, 02115

Phone (617) 732-4918

Enumeration date Jun 5, 2014

Last updated in NPPES Jun 21, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 259131 (MA) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 278678 (MA) Primary

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

What specialty is Alexandra Charrow?

Alexandra Charrow is registered in NPPES with the primary taxonomy of Dermatology 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 2019-06-21.