Killian R. O'Connell, M.D.
Psychiatry Physician · Amherst, MA
Killian R. O'Connell, M.D. is a psychiatry physician with a practice address in Amherst, Massachusetts, and NPI 1265402515, issued on Jan 26, 2006. Check the license (Massachusetts 150074, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Killian R. O'Connell
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 150074 MA
Self-reported in NPPES; status is on the state search - Practice location
- 6 University Dr, Amherst, MA 01002
- Phone
- (413) 549-9232
- Enumerated
- Jan 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (413) 549-9233
- Medicare enrollment
- Enrolled (PECOS I20041021000524); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 6 University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Baird, PTPhysical Therapist1972596617
- Samantha Sacerdote, APRNPsychiatric/Mental Health Nurse Practitioner1720840606
Verify Killian R. O'Connell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 150074Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average psychiatry physician in 2024
2,204 Medicare Part D claims for 213 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were under 1% of claims.
Most prescribed
- Lorazepam281 claims
- Bupropion Hcl Sr221 claims
- Bupropion Xl198 claims
- Clonazepam135 claims
- Dextroamphetamine-Amphetamine112 claims
- Nortriptyline Hcl85 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: $86.42
5 payments; by number, the most common kind was food and beverage; the largest payer was Lundbeck LLC. The 13,693 providers of this specialty with any payment received $4,954.93 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.
Bills Medicare through one group practice
- Amherst Psychiatric Associates, LLCAmherst, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
18 psychiatry physician records list a practice address in Amherst
They are 18 of the 769 NPPES records with a practice address in Amherst, and 2,736 psychiatry physician records in Massachusetts.
All 18 in Amherst → All 2,736 in Massachusetts → Every provider in Amherst →
Other psychiatry physician records in Massachusetts
- Karen Abdool, M.D., PH.DLynn, MA1942472824
- Harmony Abejuela, M.D.Quincy, MA1316259492
- Marielle Abell, PAAmherst, MA1275644072
- Steven Ablon, MDBoston, MA1083604839
- Keith Ablow, M.D.Newbury, MA1245423615
- Yousef Abou-Allaban, MDWalpole, MA1922040666
- Habiba Abozeid, MDBoston, MA1689408346
- Margarita Abramovich, MDPittsfield, MA1154883239
- Howard Abrams, MDSalem, MA1821102773
- David Abramson, MDCambridge, MA1376679787
Common questions
What is Killian R. O'Connell, M.D.'s NPI number?
Killian R. O'Connell, M.D.'s National Provider Identifier (NPI) is 1265402515, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Killian R. O'Connell, M.D. located?
The NPPES record lists a practice address at 6 University Dr, Amherst, MA, 01002. Phone: (413) 549-9232. Providers update this record themselves, so call before visiting.
How can I verify Killian R. O'Connell, M.D.'s license?
NPPES lists Massachusetts license number 150074, 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 Killian R. O'Connell, M.D. prescribe under Medicare Part D?
In 2024, Killian R. O'Connell, M.D. had 2,204 Medicare Part D claims for 213 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.