NPPES file of Aug 9, 2026

Brian Siembor, PH.D.

Clinical Psychologist · Boston, MA

Brian Siembor, PH.D. is a clinical psychologist with a practice address in Boston, Massachusetts, and NPI 1447627195, issued on Aug 28, 2015. Check the license (Massachusetts 10784, as entered in NPPES) with the Massachusetts 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
1447627195
Name
Brian Siembor
Credential
PH.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
10784 MA
Self-reported in NPPES; status is on the state search
Practice location
185 Devonshire St Ste 901, Boston, MA 02110
Phone
(617) 830-1780
Enumerated
Aug 28, 2015
Record last updated
Feb 26, 2026
Medicare enrollment
Enrolled (PECOS I20201124001305); 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 clinical psychologist records → All 3,185 in Massachusetts → Look up another NPI →

Also registered at 185 Devonshire St Ste 901

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

  1. Mary Anderson, PH.DClinical Psychologist1982853370
  2. Rachel Berlin, MDPsychiatry Physician1437576311
  3. Kajal Bhatt, PSY.D.Clinical Psychologist1174011837
  4. Joanna Budz, PSY.D.Psychologist1093128787
  5. Lucienne Cohen, PSY.D.Mental Health Counselor1740655380
  6. Tracey Gagnon, PH.D.Psychologist1336697994

Verify Brian Siembor in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license 10784    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 Massachusetts 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. Child And Family Psychological Services PLLCBoston, MA

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

Brian Siembor among 3,185 clinical psychologist records in Massachusetts

Brian Siembor, PH.D. is one of 3,185 clinical psychologist records with a practice address in Massachusetts. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.

  • NPI issued2015 · 73% of these records are older, 24% newer
  • In a Medicare fileYes · 12% of these records are
  • In the CMS Doctors and Clinicians fileYes · 24% of these records are
  • Graduated2017 · median 2000 among the 777 with a school on file
  • Record last updated2026 · 71% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

509 clinical psychologist records list a practice address in Boston

They are 509 of the 41,865 NPPES records with a practice address in Boston, and 3,185 clinical psychologist records in Massachusetts.

All 3,185 in Massachusetts → Every provider in Boston → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Mary Anderson, PH.DBoston, MA 021101982853370
  2. Bonnie Andrews, MPH, PHDBoston, MA 021101134740954
  3. Patricia Arroyo, PH.D.Boston, MA 021101518014521
  4. Kajal Bhatt, PSY.D.Boston, MA 021101174011837
  5. Julie Cohen, PHDBoston, MA 021101730483157
  6. Laura Fasciano, PSYDBoston, MA 021101952798324
  7. Elizabeth Gagnon, PHDBoston, MA 021101558414060
  8. Gabrielle Liverant, PH.D.Boston, MA 021101912197211

Common questions

What is Brian Siembor, PH.D.'s NPI number?

Brian Siembor, PH.D.'s National Provider Identifier (NPI) is 1447627195, issued on Aug 28, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Brian Siembor, PH.D. located?

The NPPES record lists a practice address at 185 Devonshire St Ste 901, Boston, MA, 02110. Phone: (617) 830-1780. Providers update this record themselves, so call before visiting.

How can I verify Brian Siembor, PH.D.'s license?

NPPES lists Massachusetts license number 10784, as entered by the provider. Search the Massachusetts 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.