Mary Massieu, DNP, FNP -C
NPI 1144644287 · Family Nurse Practitioner · Dewey, AZ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Massieu, DNP, FNP -C is a Family Nurse Practitioner provider in Dewey, AZ (NPI 1144644287).
Provider details
- NPI number
- 1144644287
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, FNP -C
- Sex
- Female
- Sole proprietor
- No
- License
- ARNP2936392 (FL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,184 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 212 | $51 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 196 | $104 |
| Assessment of Emotional Or Behavioral Problems96127 | 62 | $4 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 62 | $39 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 42 | $32 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 99 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 170 | 60 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 167 | 60 |
| Lisinopril | 154 | 77 |
| Gabapentin | 145 | 47 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 143 | 49 |
| Levothyroxine Sodium | 124 | 65 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$699 across 25 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-02-10
- Last updated
- 2024-10-19
- Certified
- 2024-10-19
Frequently asked questions
- What is Mary Massieu's NPI number?
- Mary Massieu's National Provider Identifier (NPI) is 1144644287, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Massieu's specialty?
- Mary Massieu is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Massieu located?
- Mary Massieu's practice location on file with NPPES is 12075 E State Route 69, Dewey, AZ 86327-4517.
- What is Mary Massieu's phone number?
- The practice phone number listed in the NPPES registry for Mary Massieu is (928) 777-9600.
- Does Mary Massieu accept Medicare?
- Mary Massieu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Massieu's NPI active?
- Yes — Mary Massieu's NPI (1144644287) is active in the NPPES registry as of the last update on 2024-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.