MICHAELA A MERRILL MAYFIELD PHD
NPI 1750573044
Psychologist in Duluth, MN

Active since August 10, 2007PECOS EnrolledAccepts Medicare Assignment
400 E 3RD ST, ESSENTIA HEALTH DULUTH CLINIC, DULUTH, MN 55805(218) 786-1186 Get Directions Write a Review

NPPES record last updated: October 17, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Michaela A Merrill Mayfield Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MICHAELA A MERRILL MAYFIELD PHD (NPI 1750573044) is an individual psychologist in Duluth, Minnesota, licensed in Minnesota (LP5028) and active in the NPI registry since August 2007. She is enrolled in Medicare PECOS, is affiliated with Essentia Health St Mary's Medical Center, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1750573044
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameMICHAELA A MERRILL MAYFIELDCredential: PHD
Location Address400 E 3RD ST, ESSENTIA HEALTH DULUTH CLINICDuluth, MN 55805-1951
Mailing Address400 E 3rd St, Essentia Health Duluth ClinicDuluth, MN 55805-1951 · (218) 786-1186
Sole ProprietorNo
Medical School CMSOtherGraduated 2007
Enumeration DateAugust 10, 2007
Last NPPES UpdateOctober 17, 2013
✔ NPI 1750573044 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in MN · LP5028
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
400 E 3RD ST, Duluth, MN 55805

Other Names 1

Professional Name (2)Michaela A Merrill Phd

Other Identifiers 4

Medicare PIN680002638MN
Medicare PIN680003446MN
Medicaid1750573044MN
Medicaid1750573044WI

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Michaela A Merrill Mayfield Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597814780
PECOS Enrollment IDI20090518000593
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Michaela Merrill Mayfield reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Multi-Specialty
400 E 3RD ST
Duluth, MN 55805
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,460 clinicians in this Medicare group
Adolescent and Children Mental Health
615 PECAN AVE
Duluth, MN 55811
  • Reassigned Medicare billing, Minnesota enrollment
  • 31 clinicians in this Medicare group
Rehabilitation
1600 MILLER TRUNK HWY BLDG C
Duluth, MN 55811
  • Reassigned Medicare billing, Minnesota enrollment
  • 8 clinicians in this Medicare group
Critical Access
3500 TOWER AVE
Superior, WI 54880
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: St Marys Hospital Of Superior
  • 381 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Essentia Health St Mary's Medical Center

Acute Care Hospitals · Duluth, MN
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240002
Location402 East Second StreetDuluth, MN 55805 · St. Louis County
Emergency services Birthing friendly

Essentia Health Duluth

Acute Care Hospitals · Duluth, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240019
Location502 East Second StreetDuluth, MN 55805 · St. Louis County
Birthing friendly

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Anesthetist, Certified Registered
400 E 3RD ST
DULUTH, MN 55805
Anesthesiology
400 E 3RD ST
DULUTH, MN 55805
Internal Medicine (Infectious Disease)
400 E 3RD ST
DULUTH, MN 55805
Nurse Practitioner (Psychiatric/Mental Health)
400 E 3RD ST
DULUTH, MN 55805
Hospitalist
400 E 3RD ST
DULUTH, MN 55805
Radiology (Diagnostic Radiology)
400 E 3RD ST
DULUTH, MN 55805
Internal Medicine (Cardiovascular Disease)
400 E 3RD ST
DULUTH, MN 55805
Clinical Nurse Specialist (Medical-Surgical)
400 E 3RD ST
DULUTH, MN 55805

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michaela Merrill Mayfield's NPI number?

The NPI number for Michaela Merrill Mayfield is 1750573044. It was assigned to this individual provider in the NPPES registry on August 10, 2007. The provider is also known as Michaela A Merrill Phd.

Where is Michaela Merrill Mayfield located?

Michaela Merrill Mayfield practices at 400 E 3rd St Essentia Health Duluth Clinic, Duluth, MN 55805. The listed phone number is (218) 786-1186.

What is Michaela Merrill Mayfield's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Michaela Merrill Mayfield enrolled in Medicare?

Yes. Michaela Merrill Mayfield is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Michaela Merrill Mayfield's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michaela Merrill Mayfield reassigns Medicare benefits to 4 organizations: The Duluth Clinic, Ltd (Duluth, MN), Smdc Medical Center (Duluth, MN), Polinsky Medical Rehabilitation Center (Duluth, MN) and St. Mary's Hospital Of Superior (Superior, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michaela Merrill Mayfield's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michaela Merrill Mayfield accept?

Health plans from Sanford Health Plan and Security Health Plan list Michaela Merrill Mayfield as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Michaela Merrill Mayfield affiliated with any hospitals?

According to CMS data, Michaela Merrill Mayfield is affiliated with Essentia Health St Mary's Medical Center and Essentia Health Duluth.

When was this NPI record last updated?

The NPPES record for Michaela Merrill Mayfield was last updated on October 17, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.