Glenn Mark Losack, M.D.
Psychiatry Physician · New York, NY
Glenn Mark Losack, M.D. is a psychiatry physician with a practice address in New York, New York, and NPI 1689839995, issued on Jul 25, 2008. Check the license (New York NYS158505, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Glenn Mark Losack
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- NYS158505 NY
Self-reported in NPPES; status is on the state search - Practice location
- 115 East 9TH Street, New York, NY 10003
- Phone
- (917) 348-2090
- Enumerated
- Jul 25, 2008
- Record last updated
- Jul 25, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140821000103); accepts Medicare assignment
- Medical or professional school
- University Central Del Caribe Escuela De Medicina, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 6,589 in New York → Look up another NPI →
Verify Glenn Mark Losack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license NYS158505Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average psychiatry physician in 2024
1,572 Medicare Part D claims for 54 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 1% of claims.
Most prescribed
- Fluoxetine Hcl116 claims
- Buspirone Hcl109 claims
- Benztropine Mesylate96 claims
- Trazodone Hcl81 claims
- Bupropion Hcl Sr76 claims
- Aripiprazole74 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
- Community Guidance CenterDu Bois, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Glenn Mark Losack among 6,589 psychiatry physician records in New York
Glenn Mark Losack, M.D. is one of 6,589 psychiatry physician records with a practice address in New York. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 39% of these records are
- Graduated1980 · median 2002 among the 2,559 with a school on file
- Record last updated2008 · 65% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,604 psychiatry physician records list a practice address in New York
They are 2,604 of the 98,468 NPPES records with a practice address in New York, and 6,589 psychiatry physician records in New York.
All 6,589 in New York → Every provider in New York → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Henry Chung, M.D.New York, NY 100031841275518
- Laura Dalheim, MDNew York, NY 100031386681641
- Herbert Fox, MDNew York, NY 100031992748271
- Guy Glass, MDNew York, NY 100031982606018
- David Klahr, MDNy, NY 100031386608529
- Melinda Lantz, MDNew York, NY 100031295733715
- Stephen Malach, M.D.New York, NY 100031407899347
- Michael Murphy, MDNew York, NY 100031821055419
Common questions
What is Glenn Mark Losack, M.D.'s NPI number?
Glenn Mark Losack, M.D.'s National Provider Identifier (NPI) is 1689839995, issued on Jul 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Glenn Mark Losack, M.D. located?
The NPPES record lists a practice address at 115 East 9TH Street, New York, NY, 10003. Phone: (917) 348-2090. Providers update this record themselves, so call before visiting.
How can I verify Glenn Mark Losack, M.D.'s license?
NPPES lists New York license number NYS158505, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Glenn Mark Losack, M.D. prescribe under Medicare Part D?
In 2024, Glenn Mark Losack, M.D. had 1,572 Medicare Part D claims for 54 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.