Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Emma Susan Williamson, CNM

Midwife in Santa Rosa, CA · enumerated 2006.

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

National Provider Identifier

1053356618

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Emma Susan Williamson

Credential CNM

Sex Female

Practice address 1111 Sonoma Ave, Ste 316, Santa Rosa, CA, 95405

Phone (707) 575-9167

Fax (707) 575-4819

Enumeration date Jun 18, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

176B00000X Midwife Other Service Providers · License 447 (CA) 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 is the NPI number for Emma Williamson?

The National Provider Identifier (NPI) for Emma Williamson is 1053356618, a Type 1 (individual) record in the CMS NPPES registry.

Where does Emma Williamson practice?

The practice location on file with NPPES is in Santa Rosa, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.