William Slaughter, MD
Psychiatry Physician · Cambridge, MA
William Slaughter, MD is a psychiatry physician with a practice address in Cambridge, Massachusetts, and NPI 1811935042, issued on Jun 2, 2006. Check the license (Massachusetts 220004, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Slaughter
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 220004 MA
Self-reported in NPPES; status is on the state search - Practice location
- 49 Hancock St, Cambridge, MA 02139
- Phone
- (617) 233-8957
- Enumerated
- Jun 2, 2006
- Entity
- Type 1 · individual
Also registered at 49 Hancock St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stella Bae, M.D.Psychiatry Physician1003900192
- Jessica Barton, LICSWSocial Worker1366417701
- William Bennett, M.D.Psychiatry Physician1922068600
- Elizabeth Bernstein, PH.D.Clinical Psychologist1891836169
- Wendy Caplan, LICSWSocial Worker1831384007
- Michael Clontz, MSW(LICSW)Clinical Social Worker1063651438
Verify William Slaughter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220004Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
99% fewer Medicare Part D claims than the average psychiatry physician in 2024
12 Medicare Part D claims, against an average of 1,010 among the 32,287 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
208 psychiatry physician records list a Cambridge practice address
They are 208 of the 5,145 NPPES records with a Cambridge practice address, and 2,637 psychiatry physician records in Massachusetts.
All 208 in Cambridge → All 2,637 in Massachusetts → Every provider in Cambridge →
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 William Slaughter, MD's NPI number?
William Slaughter, MD's National Provider Identifier (NPI) is 1811935042, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Slaughter, MD located?
The NPPES record lists a practice address at 49 Hancock St, Cambridge, MA, 02139. Phone: (617) 233-8957. Providers update this record themselves, so call before visiting.
How can I verify William Slaughter, MD's license?
NPPES lists Massachusetts license number 220004, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://www.mass.gov/orgs/board-of-registration-in-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Slaughter, MD prescribe under Medicare Part D?
In 2024, William Slaughter, MD had 12 Medicare Part D claims; the average among psychiatry physician prescribers was 1,010. 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.