Justin John Lacasse, D.O.
Psychiatry Physician · Cambridge, MA
Justin John Lacasse, D.O. is a psychiatry physician with a practice address in Cambridge, Massachusetts, and NPI 1184066219, issued on Jul 17, 2013. Check the license (Massachusetts 269291, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Justin John Lacasse
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 269291 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1493 Cambridge St, Cambridge, MA 02139
- Phone
- (617) 665-2152
- Enumerated
- Jul 17, 2013
- Record last updated
- May 4, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (617) 665-2521
- Medicare enrollment
- Enrolled (PECOS I20170804000525); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 1493 Cambridge St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Omar Abbas, MDStudent in an Organized Health Care Education/Training Program1225728025
- Nawyaab Abbasi, DOStudent in an Organized Health Care Education/Training Program1215875364
- Flannery AbbeySocial Worker1508604273
- Rana AbdallahSocial Worker1689220204
- Khaleel Abdul-Jabbaar, PT, DPTOrthopedic Physical Therapist1780295717
- Adri Abou-Bakr, MDStudent in an Organized Health Care Education/Training Program1770421844
Verify Justin John Lacasse in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 269291Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average psychiatry physician in 2024
173 Medicare Part D claims for 17 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Trazodone Hcl26 claims
- Escitalopram Oxalate21 claims
- Quetiapine Fumarate17 claims
- Duloxetine Hcl13 claims
- Lorazepam13 claims
- Clonazepam12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cambridge Public Health CommissionCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin John Lacasse among 2,736 psychiatry physician records in Massachusetts
Justin John Lacasse, D.O. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 74% of them.
- NPI issued2013 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2013 · median 2005 among the 1,219 with a school on file
- Record last updated2017 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
213 psychiatry physician records list a practice address in Cambridge
They are 213 of the 5,145 NPPES records with a practice address in Cambridge, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Cambridge → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sanda Aung, MDCambridge, MA 021391679564108
- Sherry Bauman, MDCambridge, MA 021391023082708
- Wayne Brunell, MDCambridge, MA 021391740282094
- Astrid Desrosiers, MD MPHCambridge, MA 021391033109582
- Lili Gottfried, MDCambridge, MA 021391215902390
- Sanjay Gulati, MDCambridge, MA 021391316910094
- Joseph Jackson, D.O.Cambridge, MA 021391609847631
- Michael Leslie, M.D.Cambridge, MA 021391851367395
Common questions
What is Justin John Lacasse, D.O.'s NPI number?
Justin John Lacasse, D.O.'s National Provider Identifier (NPI) is 1184066219, issued on Jul 17, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Justin John Lacasse, D.O. located?
The NPPES record lists a practice address at 1493 Cambridge St, Cambridge, MA, 02139. Phone: (617) 665-2152. Providers update this record themselves, so call before visiting.
How can I verify Justin John Lacasse, D.O.'s license?
NPPES lists Massachusetts license number 269291, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justin John Lacasse, D.O. prescribe under Medicare Part D?
In 2024, Justin John Lacasse, D.O. had 173 Medicare Part D claims for 17 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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.
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.