Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Deborah L Marsden, MBBS

Clinical Biochemical Genetics Physician in Boston, MA · enumerated 2006.

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

National Provider Identifier

1215992995

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Registry record

Entity type Individual (Type 1)

Name Dr. Deborah L Marsden

Credential MBBS

Sex Female

Practice address 300 Longwood Ave, Children'S Hospital Boston, Boston, MA, 02115

Phone (617) 355-4695

Enumeration date Apr 18, 2006

Last updated in NPPES Aug 21, 2007

Taxonomy & licenses

207SG0202X Clinical Biochemical Genetics Physician Allopathic & Osteopathic Physicians · License 82059 (MA) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 82059 (MA) Secondary

Other identifiers

Identifier	Type	State	Issuer
3147500	Medicaid	MA	-

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

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.

What specialty is Deborah Marsden?

Deborah Marsden is registered in NPPES with the primary taxonomy of Clinical Biochemical Genetics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-21.