MS. MARY ELIZABETH MASSIEU DNP, FNP -C
NPI 1144644287
Nurse Practitioner - Family in Dewey, AZ

Active since February 10, 2014PECOS EnrolledAccepts Medicare Assignment
12075 E STATE ROUTE 69, DEWEY, AZ 86327(928) 777-9600(602) 218-4443 Get Directions Write a Review

NPPES record last updated: October 19, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 6, 2023, Jun 15, 2021 (2 updates tracked since 2021).

About Ms. Mary Elizabeth Massieu Dnp, Fnp -c NPPES

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

MS. MARY ELIZABETH MASSIEU DNP, FNP -C (NPI 1144644287) is an individual family provider in Dewey, Arizona, licensed in Arizona (226377) and active in the NPI registry since February 2014. She is enrolled in Medicare PECOS and is a graduate of Other (2006).

NPPES Registry Identity

NPI1144644287
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMS. MARY ELIZABETH MASSIEUCredential: DNP, FNP -C
Location Address12075 E STATE ROUTE 69Dewey, AZ 86327-4517
Mailing Address14600 S. Waterbury Street, Suite A & BMayer, AZ 86333 · (928) 271-5490 · Fax (866) 205-4076
Fax(602) 218-4443
Sole ProprietorNo
Medical School CMSOtherGraduated 2006
Enumeration DateFebruary 10, 2014
Last NPPES UpdateOctober 19, 20242 updates tracked since enumeration
NPPES CertifiedOctober 19, 2024
NPI 1144644287 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
Licenses Licensed in AZ · 226377 Licensed in FL · ARNP2936392
12075 E STATE ROUTE 69, Dewey, AZ 86327

Other Names 1

Former Name (1)Mary Elizabeth Welsh

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Ms. Mary Elizabeth Massieu Dnp, Fnp -c 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 ID840501201
PECOS Enrollment IDI20210311003043
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.

Areas of Expertise CMS Part B claims 27

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490
Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.
212 services99 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
196 services131 patients
Assessment of emotional or behavioral problems 96127
Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.
62 services18 patients
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439
Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.
62 services38 patients
Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes 99458
This service involves analyzing your vital signs, like heart rate and blood pressure, remotely collected over a month. Each additional 20 minutes spent on management refers to extra time spent reviewing, interpreting your data, and planning your care. It's a critical part of ensuring your wellbeing.
42 services16 patients
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454
This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.
41 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 86327 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

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

Nurse Practitioner (Family)
12075 E STATE ROUTE 69
DEWEY, AZ 86327
Pharmacy (Community/Retail Pharmacy)
12075 E STATE ROUTE 69, SUITE E
DEWEY, AZ 86327

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 Mary Massieu's NPI number?

The NPI number for Mary Massieu is 1144644287. It was assigned to this individual provider in the NPPES registry on February 10, 2014. The provider is also known as Mary Elizabeth Welsh.

Where is Mary Massieu located?

Mary Massieu practices at 12075 E State Route 69, Dewey, AZ 86327. The listed phone number is (928) 777-9600.

What is Mary Massieu's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Mary Massieu enrolled in Medicare?

Yes. Mary Massieu 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.

What insurance does Mary Massieu accept?

Health plans from Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Oscar Health Maintenance Organization of Florida and UnitedHealthcare list Mary Massieu 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.

When was this NPI record last updated?

The NPPES record for Mary Massieu was last updated on October 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.