NPPES file of Aug 9, 2026

Hasmig Tatiossian, LCSW

Social Worker · Santa Rosa, CA

Hasmig Tatiossian, LCSW is a social worker with a practice address in Santa Rosa, California, and NPI 1659080695, issued on Nov 18, 2022. Check the license (California 125498, 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
1659080695
Name
Hasmig Tatiossian
Credential
LCSW
Primary taxonomy
Social Worker 104100000X
License number
125498 CA
Self-reported in NPPES; status is on the state search
Practice location
2225 Challenger Way, Santa Rosa, CA 95407
Phone
(707) 565-6900
Enumerated
Nov 18, 2022
Record last updated
Jan 14, 2026
Medicare enrollment
Enrolled (PECOS I20241120003041); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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 social worker records → All 10,332 in California → Look up another NPI →

Also registered at 2225 Challenger Way

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

  1. Jill AlterPsychiatric/Mental Health Registered Nurse1528797115
  2. David AmberPsychiatric/Mental Health Registered Nurse1992159230
  3. Ivelise Arguello, ASWCounselor1073844379
  4. Christina Atkinson, LMFTMarriage & Family Therapist1356753875
  5. Rachel AvilaAddiction (Substance Use Disorder) Counselor1003940065
  6. Todd BellingerMarriage & Family Therapist1073303202

Verify Hasmig Tatiossian 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 125498    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. County OF SonomaSanta Rosa, CA

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

Hasmig Tatiossian among 10,332 social worker records in California

Hasmig Tatiossian, LCSW is one of 10,332 social worker records with a practice address in California. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 68% of them.

  • NPI issued2022 · 68% of these records are older, 25% newer
  • In a Medicare fileYes · 2% of these records are
  • In the CMS Doctors and Clinicians fileYes · 3% of these records are
  • Graduated2020 · median 2015 among the 299 with a school on file
  • Record last updated2026 · 41% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

82 social worker records list a practice address in Santa Rosa

They are 82 of the 6,884 NPPES records with a practice address in Santa Rosa, and 10,332 social worker records in California.

All 10,332 in California → Every provider in Santa Rosa → Social Worker nationwide →

The 8 social worker records with the nearest ZIP codes

  1. Cheyenne Barajas, ASWSanta Rosa, CA 954071851904676
  2. Kelsey Bjugstad, ASWSanta Rosa, CA 954071376956177
  3. Scotty BowmanSanta Rosa, CA 954071538533351
  4. Heather Haley, LMSWSanta Rosa, CA 954071740583822
  5. Margaret HoisingtonSanta Rosa, CA 954071275858045
  6. Amanda HubbellSanta Rosa, CA 954071013662550
  7. Megan LimSanta Rosa, CA 954071316618325
  8. Leora MartinSanta Rosa, CA 954071720201353

Common questions

What is Hasmig Tatiossian, LCSW's NPI number?

Hasmig Tatiossian, LCSW's National Provider Identifier (NPI) is 1659080695, issued on Nov 18, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Hasmig Tatiossian, LCSW located?

The NPPES record lists a practice address at 2225 Challenger Way, Santa Rosa, CA, 95407. Phone: (707) 565-6900. Providers update this record themselves, so call before visiting.

How can I verify Hasmig Tatiossian, LCSW's license?

NPPES lists California license number 125498, 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.