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

Dr. Emily Megan Mackay, MD

Q: What is the NPI number for Emily Mackay?

The National Provider Identifier (NPI) for Emily Mackay is 1912735135, a Type 1 (individual) record in the CMS NPPES registry.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Seattle, WA · enumerated 2024 · practices at Swedish Medical Center.

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

National Provider Identifier

1912735135

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Registry record

Entity type Individual (Type 1)

Name Dr. Emily Megan Mackay

Credential MD

Sex Female

Practice address Seattle, WA, 98104

Phone (206) 215-6800

Fax (206) 215-6801

Enumeration date Jul 22, 2024

Last updated in NPPES Jun 27, 2025

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

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License MD61539456 (WA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
2308883	Medicaid	WA	-

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

Where does Emily Mackay practice?

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

What is the NPI number for Emily Mackay?

The National Provider Identifier (NPI) for Emily Mackay is 1912735135, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-27.