Kenneth Halliwell, M.D.
Sleep Medicine (Psychiatry & Neurology) Physician · Williamsville, NY
Kenneth Halliwell, M.D. is a sleep medicine (psychiatry & neurology) physician with a practice address in Williamsville, New York, and NPI 1639338429, issued on Jun 5, 2008. Check the license (New York 248880, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Kenneth Halliwell
- Credential
- M.D.
- Primary taxonomy
- Sleep Medicine (Psychiatry & Neurology) Physician 2084S0012X
- License number
- 248880 NY
Self-reported in NPPES; status is on the state search - Practice location
- 325 Essjay RD, Williamsville, NY 14221
- Phone
- (716) 630-1122
- Enumerated
- Jun 5, 2008
- Entity
- Type 1 · individual
Also registered at 325 Essjay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fatma Al Bayitee, MDFamily Medicine Physician1932747391
- Manju Alex, MDNephrology Physician1063613719
- Elizabeth Alvarado, LCSWClinical Social Worker1073253704
- Ralph Argen, MDRheumatology Physician1710944590
- Josephine Arnone, NPFamily Nurse Practitioner1437878113
- Alyssa Attardo, PA-CPhysician Assistant1144156613
Verify Kenneth Halliwell 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 248880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
82% fewer Medicare Part D claims than the average sleep medicine (psychiatry & neurology) physician in 2024
178 Medicare Part D claims for 34 beneficiaries, against an average of 981 among the 282 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Zolpidem Tartrate27 claims
- Zaleplon19 claims
- Modafinil16 claims
- Dextroamphetamine-Amphetamine13 claims
- Clonidine Hcl12 claims
- Xyrem12 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.
Industry payments in 2024: $33,426.35
86 payments, mostly food and beverage; the largest payer was Avadel Cns Pharmaceuticals, LLC. The 215 providers of this specialty with any payment received $7,626.03 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Buffalo Medical Group, P.C.Williamsville, NY
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Sleep Medicine (Psychiatry & Neurology) Physician providers in New York
There are 19 sleep medicine (psychiatry & neurology) physician records in New York.
Other sleep medicine (psychiatry & neurology) physician records in New York
- Imran Ahmed, MDBronx, NY1235214537
- Daniel Barone, M.D.New York, NY1043533102
- Carl Bazil, M.D, PH.D.New York, NY1891706149
- Priyanka Chilakamarri, M.D.New York, NY1346697356
- Neil Kavey, M.DChappaqua, NY1497865760
- Nina Konstantinova, MDNew York, NY1053538181
- Ewa Koziorynska, M.D.New York, NY1710997614
- Steven Lin, D.O.Staten Island, NY1922338334
- Stephen Lund, M.D.New York, NY1063562759
- Susan Manganaro, M.D.Stony Brook, NY1720217672
Common questions
What is Kenneth Halliwell, M.D.'s NPI number?
Kenneth Halliwell, M.D.'s National Provider Identifier (NPI) is 1639338429, issued on Jun 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth Halliwell, M.D. located?
The NPPES record lists a practice address at 325 Essjay RD, Williamsville, NY, 14221. Phone: (716) 630-1122. Providers update this record themselves, so call before visiting.
How can I verify Kenneth Halliwell, M.D.'s license?
NPPES lists New York license number 248880, 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 Kenneth Halliwell, M.D. prescribe under Medicare Part D?
In 2024, Kenneth Halliwell, M.D. had 178 Medicare Part D claims for 34 beneficiaries; the average among sleep medicine (psychiatry & neurology) physician prescribers was 981. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.