Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Brynn O'Donnell, NP
Nurse Practitioner in Boston, MA · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1205252731
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Ms. Brynn O'Donnell
Credential NP
Sex Female
Practice address 30 Winter St, Boston, MA, 02108
Phone (617) 426-0600
Enumeration date Mar 7, 2014
Last updated in NPPES Jan 6, 2020
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2284729 (MA) Primary
163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License RN2284729 (MA) Secondary
363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2284729 (MA) Secondary
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority.
About the NP 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.
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 Brynn O'Donnell?
Brynn O'Donnell is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Peggy Johnson Psychiatry Physician · Boston, MA NPI 1588626501 Boston Alcohol and Substance Abuse Program Substance Use Disorder Rehabilitation Clinic/Center · Boston, MA NPI 1346329463 Jacob Kagan Psychiatry Physician · Boston, MA NPI 1336282565 Thomas Delaney Social Worker · Boston, MA NPI 1104047166 Reyna Lounsbury Nurse Practitioner · Boston, MA NPI 1528252434 Lady-Thelma Bolduc Family Nurse Practitioner · Boston, MA NPI 1447562335 Cara Cavazza Nurse Practitioner · Boston, MA NPI 1063713030 Amparo Velasquez Addiction (Substance Use Disorder) Counselor · Boston, MA NPI 1740579499
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-06.