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

Ms. Alexa Mermigas

Certified Registered Nurse Anesthetist in Pittsburgh, PA · enumerated 2021 · practices at Upmc.

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

National Provider Identifier

1477124055

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Registry record

Entity type Individual (Type 1)

Name Ms. Alexa Mermigas

Sex Female

Practice address Pittsburgh, PA, 15219

Phone (412) 951-0046

Enumeration date Jul 6, 2021

Last updated in NPPES Aug 21, 2023

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 708750 (PA) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License RN708750 (PA) Primary

Other identifiers

Identifier	Type	State	Issuer
708750	Other	PA	PA RN LICENSE

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

Is NPI 1477124055 active?

Yes, as of the latest NPPES snapshot, NPI 1477124055 is active (record last updated 2023-08-21).

How do I verify Alexa Mermigas's NPI record?

Cross-check NPI 1477124055 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-21.