Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alison Willis, CNM, NP

Midwife in Hayward, CA · enumerated 2012.

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

National Provider Identifier

1689920944

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Registry record

Entity type Individual (Type 1)

Name Alison Willis

Credential CNM, NP

Sex Female

Practice address 22331 Mission Blvd, Hayward, CA, 94541

Phone (510) 471-5880

Enumeration date Jul 24, 2012

Last updated in NPPES Apr 1, 2015

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 729823 (CA) Secondary

363LX0001X Obstetrics & Gynecology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 22115 (CA) Secondary

176B00000X Midwife Other Service Providers · License 2006 (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 specialty is Alison Willis?

Alison Willis 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.

Other providers at this practice address

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Melissa Rose Pediatrics Physician · Hayward, CA NPI 1053339606 Louanne Giangreco Emergency Medicine Physician · Hayward, CA NPI 1740390574 Chiaven Phen Dentist · Hayward, CA NPI 1538259395 Michael Miller Gynecology Physician · Hayward, CA NPI 1861576043 Glenda Lovell Internal Medicine Physician · Hayward, CA NPI 1821173584 Olga Kashlinskaya Pediatric Adolescent Medicine Physician · Hayward, CA NPI 1932284650 Carl Gray Family Medicine Physician · Hayward, CA NPI 1326126152 Sridevi Ponnala Public Health Dentistry · Hayward, CA NPI 1841365863

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-01.