Registry data as of Aug 27, 2026

B.melissa Derfler, MD

Psychiatry Physician · Arroyo Grande, CA

B.melissa Derfler, MD is a psychiatry physician with a practice address in Arroyo Grande, California, and NPI 1053472373, issued on Dec 12, 2006. Check the license on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1053472373
Name
B.melissa Derfler
Credential
MD
Primary taxonomy
Psychiatry Physician 2084P0800X
Practice location
1057 Grand Ave, Arroyo Grande, CA 93420
Phone
(805) 481-7220
Enumerated
Dec 12, 2006
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 B.melissa Derfler in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck 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
Open 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.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

Psychiatry Physician providers in California

There are 7,890 psychiatry physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 7,890 in California → Every provider in Arroyo Grande →

Other psychiatry physician records in California

  1. Nancy Aaen, MDNapa, CA1609816669
  2. Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
  3. Mekabiz Abaian, MDSan Bernardino, CA1891090163
  4. Kafia Abbasi, M.D.French Camp, CA1215114897
  5. Michele Abbasi, M.D.Westlake Village, CA1093940330
  6. Zohaib AbbasiMartinez, CA1013392224
  7. Chester Abbott, M.D.Pasadena, CA1053442186
  8. Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
  9. Ezzat Abdelmalek, M.DDana Point, CA1992828826
  10. Ahmed AbdelrazekSacramento, CA1669092128

Common questions

What is B.melissa Derfler, MD's NPI number?

B.melissa Derfler, MD's National Provider Identifier (NPI) is 1053472373, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is B.melissa Derfler, MD located?

The NPPES record lists a practice address at 1057 Grand Ave, Arroyo Grande, CA, 93420. Phone: (805) 481-7220. Providers update this record themselves, so call before visiting.

How can I verify B.melissa Derfler, MD's license?

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.

Compiled from official public sources by the editorial process.

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.