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Adam Crystal, MD, PHD

Internal Medicine Physician in Boston, MA · enumerated 2007.

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

National Provider Identifier

1649307075

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Registry record

Entity type Individual (Type 1)
Name Adam Crystal
Credential MD, PHD
Sex Male
Practice address Massachusetts General Hospital, 55 Fruit Street, Boston, MA, 02114
Phone (617) 726-2066
Enumeration date Feb 27, 2007
Last updated in NPPES Sep 7, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License L-229155 (MA) Primary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 238214 (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

Where does Adam Crystal practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Adam Crystal?
The National Provider Identifier (NPI) for Adam Crystal is 1649307075, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-09-07.