Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thaddeus P. Dryja, MD

Ophthalmology Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1619961968

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Registry record

Entity type Individual (Type 1)

Name Dr. Thaddeus P. Dryja

Credential MD

Sex Male

Practice address 243 Charles St, Boston, MA, 02114

Phone (617) 573-3319

Enumeration date Sep 1, 2005

Last updated in NPPES Oct 8, 2010

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 41891 (MA) Primary

207ZP0105X Clinical Pathology/Laboratory Medicine Physician Allopathic & Osteopathic Physicians · License 41891 (MA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0148296	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

What specialty is Thaddeus Dryja?

Thaddeus Dryja is registered in NPPES with the primary taxonomy of Ophthalmology 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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John Dobrowski Otolaryngology Physician · Boston, MA NPI 1538160452 Robert Barboza Certified Registered Nurse Anesthetist · Boston, MA NPI 1568463495 Jane Schweitzer Ophthalmology Physician · Boston, MA NPI 1386637064 Mack Cheney Facial Plastic Surgery Physician · Boston, MA NPI 1306832316 Deeba Husain Ophthalmology Physician · Boston, MA NPI 1952397697 Peng Xiao Anesthesiology Physician · Boston, MA NPI 1073509782 Suzanne Freitag Ophthalmology Physician · Boston, MA NPI 1710974464 Robert Levine Neurology Physician · Boston, MA NPI 1154318459

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-08.