Maria E. Johnston, FNP
Family Nurse Practitioner · Tucson, AZ
Maria E. Johnston, FNP is a family nurse practitioner with a practice address in Tucson, Arizona, and NPI 1083693444, issued on Jan 13, 2006. Check the license (Arizona RN048006, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria E. Johnston
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN048006 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3939 S Park Ave, Tucson, AZ 85714
- Phone
- (520) 746-5001
- Enumerated
- Jan 13, 2006
- Record last updated
- Aug 15, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (520) 573-9607
- Medicaid ID
- 364414 AZ
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,933 in Arizona → Look up another NPI →
Also registered at 3939 S Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Diana Comaduran, FNPFamily Nurse Practitioner1528047958
- Camelia Gembala, FNP-CFamily Nurse Practitioner1104004191
- Rosalia Kame, M.D.Family Medicine Physician1902881766
- Abigail LindsayProfessional Counselor1902548456
- Marlaina MadduxClinical Social Worker1902525272
- Misty McGillem, DNPPsychiatric/Mental Health Nurse Practitioner1467847822
Verify Maria E. Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license RN048006Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average family nurse practitioner in 2024
210 Medicare Part D claims for 79 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium25 claims
- Lisinopril12 claims
- Amlodipine Besylate11 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: $59.53
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 99,489 providers of this specialty with any payment received $650.95 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.
Maria E. Johnston among 5,933 family nurse practitioner records in Arizona
Maria E. Johnston, FNP is one of 5,933 family nurse practitioner records with a practice address in Arizona. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 91% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2011 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
907 family nurse practitioner records list a practice address in Tucson
They are 907 of the 18,788 NPPES records with a practice address in Tucson, and 5,933 family nurse practitioner records in Arizona.
All 5,933 in Arizona → Every provider in Tucson → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Jessica Borbon, FNP-CTucson, AZ 857141487146031
- Amy ColvinTucson, AZ 857141356724983
- Diana Comaduran, FNPTucson, AZ 857141528047958
- Kyla Diesner, DNP, FNP-CTucson, AZ 857141891321758
- Camelia Gembala, FNP-CTucson, AZ 857141104004191
- David Grimm, FNPTucson, AZ 857141699908855
- Esmeralda Lopez, FNPTucson, AZ 857141760860183
- Celia Lozano, DNPTucson, AZ 857141083152631
Common questions
What is Maria E. Johnston, FNP's NPI number?
Maria E. Johnston, FNP's National Provider Identifier (NPI) is 1083693444, issued on Jan 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maria E. Johnston, FNP located?
The NPPES record lists a practice address at 3939 S Park Ave, Tucson, AZ, 85714. Phone: (520) 746-5001. Providers update this record themselves, so call before visiting.
How can I verify Maria E. Johnston, FNP's license?
NPPES lists Arizona license number RN048006, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Maria E. Johnston, FNP prescribe under Medicare Part D?
In 2024, Maria E. Johnston, FNP had 210 Medicare Part D claims for 79 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 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.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.