Helen Yost, M.D.
General Practice Physician · Vallecito, CA
Helen Yost, M.D. is a general practice physician with a practice address in Vallecito, California, and NPI 1699023127, issued on Aug 15, 2012. Check the license (California G34591, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Helen Yost
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- G34591 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4216 Parrotts Ferry RD, Vallecito, CA 95251
- Phone
- (209) 736-9456
- Enumerated
- Aug 15, 2012
- Entity
- Type 1 · individual
Verify Helen Yost in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
General Practice Physician providers in California
There are 1,869 general practice physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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Common questions
What is Helen Yost, M.D.'s NPI number?
Helen Yost, M.D.'s National Provider Identifier (NPI) is 1699023127, issued on Aug 15, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Helen Yost, M.D. located?
The NPPES record lists a practice address at 4216 Parrotts Ferry RD, Vallecito, CA, 95251. Phone: (209) 736-9456. Providers update this record themselves, so call before visiting.
How can I verify Helen Yost, M.D.'s license?
NPPES lists California license number G34591, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.