Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michaela A Merrill Mayfield, PHD

Psychologist in Duluth, MN · enumerated 2007.

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

National Provider Identifier

1750573044

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Michaela A Merrill Mayfield

Credential PHD

Sex Female

Practice address 400 E 3rd St, Essentia Health Duluth Clinic, Duluth, MN, 55805

Phone (218) 786-1186

Enumeration date Aug 10, 2007

Last updated in NPPES Oct 17, 2013

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License LP5028 (MN) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
1750573044	Medicaid	MN	-
1750573044	Medicaid	WI	-

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 Michaela Merrill Mayfield?

Michaela Merrill Mayfield is registered in NPPES with the primary taxonomy of Psychologist. 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

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-17.