NPPES file of Aug 9, 2026

Frank Du, R.N.

Case Management Registered Nurse · Sunnyvale, CA

Frank Du, R.N. is a case management registered nurse with a practice address in Sunnyvale, California, and NPI 1689855637, issued on Nov 19, 2007. Check the license (California 518414, as entered in NPPES) with the California 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
1689855637
Name
Frank Du
Credential
R.N.
Primary taxonomy
Case Management Registered Nurse 163WC0400X
License number
518414 CA
Self-reported in NPPES; status is on the state search
Practice location
660 S Fair Oaks Ave, Sunnyvale, CA 94086
Phone
(408) 992-4938
Enumerated
Nov 19, 2007
Record last updated
Nov 19, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(408) 992-4901
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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8 nearest case management registered nurse records → All 1,025 in California → Look up another NPI →

Also registered at 660 S Fair Oaks Ave

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

  1. Rachel AcideraCommunity Health Registered Nurse1649696618
  2. Anthony Aguiar, RN, PHNCase Management Registered Nurse1326751991
  3. Daniela AnayaMarriage & Family Therapist1720567092
  4. Zoe AndersonMarriage & Family Therapist1568077204
  5. Mialynn ArimasCase Management Registered Nurse1720726185
  6. Aine Baum, M.A., MFTIMarriage & Family Therapist1053555763

Verify Frank Du in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 518414    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 California license search

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Frank Du among 1,025 case management registered nurse records in California

Frank Du, R.N. is one of 1,025 case management registered nurse records with a practice address in California. 1% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 2% of them.

  • NPI issued2007 · 2% of these records are older, 76% newer
  • In a Medicare fileNo · 1% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2007 · 68% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163WC0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

18 case management registered nurse records list a practice address in Sunnyvale

They are 18 of the 1,690 NPPES records with a practice address in Sunnyvale, and 1,025 case management registered nurse records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,025 in California → Every provider in Sunnyvale → Case Management Registered Nurse nationwide →

The 8 case management registered nurse records with the nearest ZIP codes

  1. Annie Chan, R.N.Sunnyvale, CA 940861548443492
  2. Shiow-Huey Chang, R.N.Sunnyvale, CA 940861780867374
  3. Dawn Flores, R.N.Sunnyvale, CA 940861649451329
  4. Cynthia Jacobson, R.N.Sunnyvale, CA 940861083897680
  5. Ann Ky, R.N.Sunnyvale, CA 940861326221920
  6. Linda O'Connor, R.N.Sunnyvale, CA 940861407039001
  7. Sharon Shumaker, R.N.Sunnyvale, CA 940861679756266
  8. Lori SmithSunnyvale, CA 940861700325180

Common questions

What is Frank Du, R.N.'s NPI number?

Frank Du, R.N.'s National Provider Identifier (NPI) is 1689855637, issued on Nov 19, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Frank Du, R.N. located?

The NPPES record lists a practice address at 660 S Fair Oaks Ave, Sunnyvale, CA, 94086. Phone: (408) 992-4938. Providers update this record themselves, so call before visiting.

How can I verify Frank Du, R.N.'s license?

NPPES lists California license number 518414, as entered by the provider. Search the California 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.