NPPES file of Aug 9, 2026

Gillian Marina Ruiz, RD

Registered Dietitian · Oro Valley, AZ

Gillian Marina Ruiz, RD is a registered dietitian with a practice address in Oro Valley, Arizona, and NPI 1598496622, issued on Jun 20, 2022. Check the license with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1598496622
Name
Gillian Marina Ruiz
Credential
RD
Primary taxonomy
Registered Dietitian 133V00000X
License number
86325355 TX
Self-reported in NPPES; status is on the state search
Practice location
1846 E Innovation Park Dr, Oro Valley, AZ 85755
Phone
(520) 477-1650
Enumerated
Jun 20, 2022
Record last updated
Jun 20, 2022
Fax
(520) 829-3551
Medicare enrollment
Enrolled (PECOS I20220720001436); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest registered dietitian records → All 1,435 in Arizona → Look up another NPI →

Also registered at 1846 E Innovation Park Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Vickie Anderson, PMHNPPsychiatric/Mental Health Nurse Practitioner1265083802
  2. Jonathan AshOther Specialist/Technologist1013366657
  3. Carley Baghai, DNP, PMHNP-BC, APRNPsychiatric/Mental Health Nurse Practitioner1679355549
  4. Samantha Kingma, MS, LMFTMarriage & Family Therapist1982170783
  5. Tara Liwski, MS, RDNRegistered Dietitian1043882863
  6. Jennifer McDade, RDNPediatric Nutrition Registered Dietitian1376405985

Verify Gillian Marina Ruiz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Arizona board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Arizona license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Duke Nutrition Experts LLCOro Valley, AZ

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gillian Marina Ruiz among 1,435 registered dietitian records in Arizona

Gillian Marina Ruiz, RD is one of 1,435 registered dietitian records with a practice address in Arizona. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 70% of them.

  • NPI issued2022 · 70% of these records are older, 23% newer
  • In a Medicare fileYes · 15% of these records are
  • In the CMS Doctors and Clinicians fileYes · 18% of these records are
  • Graduated2021 · median 2018 among the 257 with a school on file
  • Record last updated2022 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

8 registered dietitian records list a practice address in Oro Valley

They are 8 of the 542 NPPES records with a practice address in Oro Valley, and 1,435 registered dietitian records in Arizona.

All 1,435 in Arizona → Every provider in Oro Valley → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Amarissa Handy, RDOro Valley, AZ 857551558109777
  2. Tara Liwski, MS, RDNOro Valley, AZ 857551043882863
  3. Courtney SmithOro Valley, AZ 857551740011493
  4. Jenel StensurdOro Valley, AZ 857551962374397
  5. Jamie Lopez, RDTucson, AZ 857561558239376
  6. Laura Diamond, RDNTucson, AZ 857501912486572
  7. Jil Feldhausen, RDNTucson, AZ 857501649659962
  8. Yael Greenblatt, MS, RDNTucson, AZ 857501235756875

Common questions

What is Gillian Marina Ruiz, RD's NPI number?

Gillian Marina Ruiz, RD's National Provider Identifier (NPI) is 1598496622, issued on Jun 20, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Gillian Marina Ruiz, RD located?

The NPPES record lists a practice address at 1846 E Innovation Park Dr, Oro Valley, AZ, 85755. Phone: (520) 477-1650. Providers update this record themselves, so call before visiting.

How can I verify Gillian Marina Ruiz, RD's license?

Search the Arizona board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.