Brian David Kossak, M.D.
Sleep Medicine (Psychiatry & Neurology) Physician · Manchester, NH
Brian David Kossak, M.D. is a sleep medicine (psychiatry & neurology) physician with a practice address in Manchester, New Hampshire, and NPI 1164459368, issued on Jun 26, 2006. Check the license (New Hampshire 8711, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Brian David Kossak
- Credential
- M.D.
- Primary taxonomy
- Sleep Medicine (Psychiatry & Neurology) Physician 2084S0012X
- License numbers
- 8711 NH
213688 MA
Self-reported in NPPES; status is on the state search - Practice location
- 87 Mcgregor St, Manchester, NH 03102
- Phone
- (603) 695-2500
- Enumerated
- Jun 26, 2006
- Record last updated
- Jun 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (603) 695-2960
- Medicare enrollment
- Enrolled (PECOS I20051107000573); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sleep medicine (psychiatry & neurology) physician records → All 9 in New Hampshire → Look up another NPI →
Also registered at 87 Mcgregor St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Brian David Kossak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 8711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average sleep medicine (psychiatry & neurology) physician in 2024
155 Medicare Part D claims for 33 beneficiaries, against an average of 655 among the 377 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Gabapentin37 claims
- Ropinirole Hcl29 claims
- Clonazepam13 claims
- Belsomra12 claims
- Zolpidem Tartrate12 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
- Foundation Medical Partners IncMilford, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sleep Medicine (Psychiatry & Neurology) Physician providers in New Hampshire
There are 9 sleep medicine (psychiatry & neurology) physician records in New Hampshire.
All 9 in New Hampshire → Every provider in Manchester → Sleep Medicine (Psychiatry & Neurology) Physician nationwide →
The 8 sleep medicine (psychiatry & neurology) physician records with the nearest ZIP codes
- Michele Rush, MDLaconia, NH 032461902877970
- Nicolette Gebhardt, M.D.Gilford, NH 032491386703817
- Robert Comey, M.D.Lebanon, NH 037561730311192
- Glen Greenough, MDLebanon, NH 037561538237839
- Michael Sateia, MDLebanon, NH 037561871661181
- Andrew Cichowski, MDLebanon, NH 037661730508862
- Barry Cohen, MDLebanon, NH 037661295839660
- Rachel Higginbotham, MDDover, NH 038201548318256
Common questions
What is Brian David Kossak, M.D.'s NPI number?
Brian David Kossak, M.D.'s National Provider Identifier (NPI) is 1164459368, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brian David Kossak, M.D. located?
The NPPES record lists a practice address at 87 Mcgregor St, Manchester, NH, 03102. Phone: (603) 695-2500. Providers update this record themselves, so call before visiting.
How can I verify Brian David Kossak, M.D.'s license?
NPPES lists New Hampshire license number 8711, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brian David Kossak, M.D. prescribe under Medicare Part D?
In 2024, Brian David Kossak, M.D. had 155 Medicare Part D claims for 33 beneficiaries; the average among sleep medicine (psychiatry & neurology) physician prescribers was 655. 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.