Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lynne A. Masterson, CNM

Midwife in Worcester, MA · enumerated 2013.

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

National Provider Identifier

1447592290

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Registry record

Entity type Individual (Type 1)

Name Lynne A. Masterson

Credential CNM

Sex Female

Practice address 123 Summer St, Suite 150s, Worcester, MA, 01608

Phone (508) 368-3110

Fax (508) 368-3113

Enumeration date Mar 20, 2013

Last updated in NPPES Mar 5, 2024

Taxonomy & licenses

176B00000X Midwife Other Service Providers · License RN265289 (MA) Primary

CNM · Certified Nurse Midwife: An advanced practice nurse specializing in pregnancy, childbirth, and reproductive care. About the CNM 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Lynne Masterson?

Lynne Masterson is registered in NPPES with the primary taxonomy of Midwife. 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-05.