NPPES file of Aug 9, 2026

Siavhan O'Brien, FNP-C

Primary Care Nurse Practitioner · Tucson, AZ

Siavhan O'Brien, FNP-C is a primary care nurse practitioner with a practice address in Tucson, Arizona, and NPI 1821924002, issued on Jun 23, 2026. Check the license (Arizona 341597, as entered in NPPES) with the Arizona board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1821924002
Name
Siavhan O'Brien
Credential
FNP-C
Primary taxonomy
Primary Care Nurse Practitioner 363LP2300X
License number
341597 AZ
Self-reported in NPPES; status is on the state search
Practice location
334 N Medford Dr, Tucson, AZ 85710
Phone
(520) 729-0327
Enumerated
Jun 23, 2026
Record last updated
Jun 23, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify Siavhan O'Brien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Arizona board licenses this profession
    Search for license 341597    Check 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

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Primary Care Nurse Practitioner providers in Arizona

There are 263 primary care nurse practitioner records in Arizona. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 263 in Arizona → Every provider in Tucson →

Other primary care nurse practitioner records in Arizona

  1. Gerald Abastillas, AGPCNPSacaton, AZ1386189777
  2. Yoaneidis Aiello, FNP-CTucson, AZ1841068509
  3. Adeola Ajayi, APRNTucson, AZ1558753137
  4. Linda Alberino, RN-CNPPhoenix, AZ1225141096
  5. Sheryl Allred, NP-CPhoenix, AZ1386697449
  6. Janine Altobelli, AGNP-CMesa, AZ1023489192
  7. Brittany Amado, FNP-CGlobe, AZ1609488204
  8. Daniel AmayaSomerton, AZ1376322974
  9. Roxie Anderson, APN RNTempe, AZ1558359109
  10. Mikayla Andrea, FNP-CPhoenix, AZ1346971629

Common questions

What is Siavhan O'Brien, FNP-C's NPI number?

Siavhan O'Brien, FNP-C's National Provider Identifier (NPI) is 1821924002, issued on Jun 23, 2026. An NPI identifies a provider in billing; it is not a license.

Where is Siavhan O'Brien, FNP-C located?

The NPPES record lists a practice address at 334 N Medford Dr, Tucson, AZ, 85710. Phone: (520) 729-0327. Providers update this record themselves, so call before visiting.

How can I verify Siavhan O'Brien, FNP-C's license?

NPPES lists Arizona license number 341597, as entered by the provider. 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. 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.