Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Miss Maria Milagros Sierra-Ayala, M.S. PHL

Speech-Language Pathologist in Ponce, PR · enumerated 2008.

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

National Provider Identifier

1558506618

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Registry record

Entity type Individual (Type 1)

Name Miss Maria Milagros Sierra-Ayala

Credential M.S. PHL

Sex Female

Practice address Urb. Tibes 5 J-3, Ponce, PR, 00730

Phone (787) 299-2514

Enumeration date Dec 3, 2008

Last updated in NPPES Dec 3, 2008

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 847 (PR) Primary

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

What is the NPI number for Maria Sierra-Ayala?

The National Provider Identifier (NPI) for Maria Sierra-Ayala is 1558506618, a Type 1 (individual) record in the CMS NPPES registry.

Where does Maria Sierra-Ayala practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-12-03.