Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Claire Tine Cronin, M.D.
Surgery Physician in Boston, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720084833
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Registry record
Entity type Individual (Type 1)
Name Claire Tine Cronin
Credential M.D.
Sex Female
Practice address 133 Brookline Ave, Boston, MA, 02215
Phone (617) 421-8749
Fax (617) 421-2236
Enumeration date Jun 23, 2005
Last updated in NPPES Feb 10, 2021
Taxonomy & licenses
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 |
|---|---|---|---|
| 3209121 | 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.
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 Claire Cronin?
Claire Cronin is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Renu Soni Internal Medicine Physician · Boston, MA NPI 1649276585 Marshall Katz Cardiovascular Disease Physician · Boston, MA NPI 1124024013 James Wharam Internal Medicine Physician · Boston, MA NPI 1740280288 Jennifer Fournier Nurse Practitioner · Boston, MA NPI 1801898275 David Agoada Podiatrist · Boston, MA NPI 1558353714 Christopher Andreoli Ophthalmology Physician · Boston, MA NPI 1134112188 Jerome Auerbach Diagnostic Radiology Physician · Boston, MA NPI 1417942129 Eric Cortell Diagnostic Radiology Physician · Boston, MA NPI 1992791545
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-10.