NPPES file of Aug 9, 2026

Andrea C. Blonstein, RD, MBA

Registered Dietitian · Sunnyvale, CA

Andrea C. Blonstein, RD, MBA is a registered dietitian with a practice address in Sunnyvale, California, and NPI 1326115791, issued on Nov 29, 2006. Check the license (California RD017713, as entered in NPPES) with the California 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
1326115791
Name
Andrea C. Blonstein
Credential
RD, MBA
Primary taxonomy
Registered Dietitian 133V00000X
License number
RD017713 CA
Self-reported in NPPES; status is on the state search
Practice location
301 Old San Francisco RD, Sunnyvale, CA 94086
Phone
(650) 934-7177
Enumerated
Nov 29, 2006
Record last updated
Mar 4, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20090209000274); accepts Medicare assignment
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 7,148 in California → Look up another NPI →

Also registered at 301 Old San Francisco RD

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

  1. Zubia Ahmad, MDInternal Medicine Physician1265879522
  2. Syed Salman Ali, MDInternal Medicine Physician1740621671
  3. Wafa Aljuneidi, MSN, APRN-NP, FNP-CNurse Practitioner1083583991
  4. Aisha AminInternal Medicine Physician1013440981
  5. Joyce Ang, MDPediatrics Physician1346634698
  6. Lulua Bahrainwala, MD, MSFamily Medicine Physician1568949709

Verify Andrea C. Blonstein 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 RD017713    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

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. Sutter Bay Medical FoundationLos Altos, CA

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

Andrea C. Blonstein among 7,148 registered dietitian records in California

Andrea C. Blonstein, RD, MBA is one of 7,148 registered dietitian records with a practice address in California. 5% 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 under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 94% newer
  • In a Medicare fileYes · 5% of these records are
  • In the CMS Doctors and Clinicians fileYes · 7% of these records are
  • Graduated1983 · median 2014 among the 529 with a school on file
  • Record last updated2020 · 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

34 registered dietitian records list a practice address in Sunnyvale

They are 34 of the 1,690 NPPES records with a practice address in Sunnyvale, and 7,148 registered dietitian records in California.

All 7,148 in California → Every provider in Sunnyvale → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Zelin Chen, RDSunnyvale, CA 940861578199808
  2. Eshan DandekarSunnyvale, CA 940861174150213
  3. Geeta GlasserSunnyvale, CA 940861174699805
  4. Anqi Jian, MS,RDNSunnyvale, CA 940861750996344
  5. Yiwen LuSunnyvale, CA 940861831725019
  6. Chitra Malani, MS, RD, CDCESSunnyvale, CA 940861740405729
  7. Rebecca Porthouse, R.D.Sunnyvale, CA 940861003077603
  8. Pui Tong, MS, RDSunnyvale, CA 940861639705122

Common questions

What is Andrea C. Blonstein, RD, MBA's NPI number?

Andrea C. Blonstein, RD, MBA's National Provider Identifier (NPI) is 1326115791, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Andrea C. Blonstein, RD, MBA located?

The NPPES record lists a practice address at 301 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (650) 934-7177. Providers update this record themselves, so call before visiting.

How can I verify Andrea C. Blonstein, RD, MBA's license?

NPPES lists California license number RD017713, 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. 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.