NPPES file of Aug 9, 2026

Ronald Marc Sharrin, PHD

Adult Development & Aging Psychologist · Topanga, CA

Ronald Marc Sharrin, PHD is an adult development & aging psychologist with a practice address in Topanga, California, and NPI 1306142112, issued on Jan 27, 2011. Check the license (California PSY5775, 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
1306142112
Name
Ronald Marc Sharrin
Credential
PHD
Primary taxonomy
Adult Development & Aging Psychologist 103TA0700X
License number
PSY5775 CA
Self-reported in NPPES; status is on the state search
Practice location
20774 Hillside Dr, Topanga, CA 90290
Phone
(310) 455-1200
Enumerated
Jan 27, 2011
Record last updated
Jan 27, 2011 (not updated in 15 years: call before relying on the address or phone)
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 Ronald Marc Sharrin 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 PSY5775    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
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1 adult development & aging psychologist records list a practice address in Topanga

They are 1 of the 56 NPPES records with a practice address in Topanga, and 42 adult development & aging psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 42 in California → Every provider in Topanga →

Other adult development & aging psychologist records in California

  1. Sahar AliCorona, CA1902449366
  2. Tracy Artson, PH.D.San Francisco, CA1447461058
  3. James Bostwick, PH.D.Placentia, CA1205026028
  4. Abby Brewer-Johnson, PSY.D.San Diego, CA1346321742
  5. Cassandra Claiborne, NURSELos Angeles, CA1790533669
  6. Roberta Corson, PH.D.San Jose, CA1881802080
  7. Srbui Dertsakyan, M.A., PSY.D.Fairfield, CA1366706806
  8. Maya Elyashkevich, PSY.D.Camarillo, CA1750408183
  9. Aiyana GarciaHerald, CA1275309536
  10. Corinne Giantonio, PH.DLincoln, CA1013062017

Common questions

What is Ronald Marc Sharrin, PHD's NPI number?

Ronald Marc Sharrin, PHD's National Provider Identifier (NPI) is 1306142112, issued on Jan 27, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Ronald Marc Sharrin, PHD located?

The NPPES record lists a practice address at 20774 Hillside Dr, Topanga, CA, 90290. Phone: (310) 455-1200. Providers update this record themselves, so call before visiting.

How can I verify Ronald Marc Sharrin, PHD's license?

NPPES lists California license number PSY5775, 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.