Mary Massieu, DNP, FNP -C
Family Nurse Practitioner · Dewey, AZ
Mary Massieu, DNP, FNP -C is a family nurse practitioner with a practice address in Dewey, Arizona, and NPI 1144644287, issued on Feb 10, 2014. Check the license (Arizona 226377, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Massieu
- Credential
- DNP, FNP -C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 226377 AZ
ARNP2936392 FL
Self-reported in NPPES; status is on the state search - Practice location
- 12075 E State Route 69, Dewey, AZ 86327
- Phone
- (928) 777-9600
- Enumerated
- Feb 10, 2014
- Entity
- Type 1 · individual
Also registered at 12075 E State Route 69
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Durnan, FNP-CSchool Registered Nurse1306181656
Verify Mary Massieu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 226377Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
3.5 times the Medicare Part D claims of the average family nurse practitioner in 2024
4,534 Medicare Part D claims for 690 beneficiaries, against an average of 1,302 among the 128,048 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 434 claims were for opioids.
Most prescribed
- Atorvastatin Calcium170 claims
- Albuterol Sulfate Hfa167 claims
- Lisinopril154 claims
- Gabapentin145 claims
- Hydrocodone-Acetaminophen143 claims
- Levothyroxine Sodium124 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $699.37
25 payments, mostly food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 91,435 providers of this specialty with any payment received $675.31 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Carelock LLCChino Valley, AZ
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
5 family nurse practitioner records list a Dewey practice address
They are 5 of the 51 NPPES records with a Dewey practice address, and 5,394 family nurse practitioner records in Arizona.
All 5 in Dewey → All 5,394 in Arizona → Every provider in Dewey →
Other family nurse practitioner records in Arizona
- Sharla Abalos, NPTucson, AZ1356017677
- Kristian Abarca, DNP, FNPWillcox, AZ1710587019
- Rosa Abarca, FNP-BC, FNP-CYuma, AZ1023716149
- Dorothy AbbeyPhoenix, AZ1194535336
- Brady AbbottTaylor, AZ1295669331
- Lamia Abdouni, PMHNPChandler, AZ1679928790
- Dahab Abdukkaliq, FNPChandler, AZ1780190108
- Manuel Abeyta, FNP-BCPeridot, AZ1871323600
- Brittnie Abishalom, NPScottsdale, AZ1841813748
- Inna Ablyaeva, FNPScottsdale, AZ1134600133
Common questions
What is Mary Massieu, DNP, FNP -C's NPI number?
Mary Massieu, DNP, FNP -C's National Provider Identifier (NPI) is 1144644287, issued on Feb 10, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Mary Massieu, DNP, FNP -C located?
The NPPES record lists a practice address at 12075 E State Route 69, Dewey, AZ, 86327. Phone: (928) 777-9600. Providers update this record themselves, so call before visiting.
How can I verify Mary Massieu, DNP, FNP -C's license?
NPPES lists Arizona license number 226377, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Massieu, DNP, FNP -C prescribe under Medicare Part D?
In 2024, Mary Massieu, DNP, FNP -C had 4,534 Medicare Part D claims for 690 beneficiaries; the average among family nurse practitioner prescribers was 1,302. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.