NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mary Sponsler, MSN, APRN, CNM, PHN

Advanced Practice Midwife in Sonora, CA · enumerated 2019 · practices at Sierra Natural Birth Center LLC.

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

National Provider Identifier

1164987335

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Registry record

Entity type Individual (Type 1)
Name Mary Sponsler
Credential MSN, APRN, CNM, PHN
Sex Female
Practice address Sonora, CA, 95370
Phone (209) 533-2300
Fax (209) 533-4300
Enumeration date Feb 1, 2019
Last updated in NPPES Apr 24, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN481611 (CA) Secondary
367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License NMW236534 (CA) Primary
APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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.

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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 Mary Sponsler?
Mary Sponsler is registered in NPPES with the primary taxonomy of Advanced Practice Midwife. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-24.