NPPES file of Aug 9, 2026

Layla R. Callahan, RADT

Addiction (Substance Use Disorder) Counselor · Grass Valley, CA

Layla R. Callahan, RADT is an addiction (substance use disorder) counselor with a practice address in Grass Valley, California, and NPI 1720633589, issued on Aug 7, 2019. Check the license (California R1338330219, 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
1720633589
Name
Layla R. Callahan
Credential
RADT
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License number
R1338330219 CA
Self-reported in NPPES; status is on the state search
Practice location
159 Brentwood Dr, Grass Valley, CA 95945
Phone
(530) 885-1917
Enumerated
Aug 7, 2019
Record last updated
Jun 26, 2020 (not updated in 6 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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Also registered at 159 Brentwood Dr

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

  1. Karen Arnold, RADTAddiction (Substance Use Disorder) Counselor1902433451
  2. Stephen BennettAddiction (Substance Use Disorder) Counselor1124820444
  3. Qiana Burke, RADTAddiction (Substance Use Disorder) Counselor1922860436
  4. Melissa Burnett, RADTAddiction (Substance Use Disorder) Counselor1396387734
  5. Lisa Callison, RADTAddiction (Substance Use Disorder) Counselor1427800887
  6. Trisha Cole, RADTAddiction (Substance Use Disorder) Counselor1366072613

Verify Layla R. Callahan 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 R1338330219    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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148 addiction (substance use disorder) counselor records list a practice address in Grass Valley

They are 148 of the 1,540 NPPES records with a practice address in Grass Valley, and 27,741 addiction (substance use disorder) counselor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 148 in Grass Valley → All 27,741 in California → Every provider in Grass Valley →

Other addiction (substance use disorder) counselor records in California

  1. Sean A Jerome, CADCIICosta Mesa, CA1831884550
  2. Carrie AamodtVisalia, CA1932661311
  3. Emory Aaron, CCAPP C4321214Los Angeles, CA1073980801
  4. Lisa Aaron, CASACCulver City, CA1356090849
  5. Michael Abacherli, JD, RADTSan Jacinto, CA1235826983
  6. Victor AbadEl Cajon, CA1205562238
  7. Sean AbairTaft, CA1174084347
  8. Maira AbalosDelano, CA1508452038
  9. Jazmine AbanicoVentura, CA1851964613
  10. Israel Abarca, CAADESan Francisco, CA1114126950

Common questions

What is Layla R. Callahan, RADT's NPI number?

Layla R. Callahan, RADT's National Provider Identifier (NPI) is 1720633589, issued on Aug 7, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Layla R. Callahan, RADT located?

The NPPES record lists a practice address at 159 Brentwood Dr, Grass Valley, CA, 95945. Phone: (530) 885-1917. Providers update this record themselves, so call before visiting.

How can I verify Layla R. Callahan, RADT's license?

NPPES lists California license number R1338330219, 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.