Michael Horwich, MD, PHD
Dermatology Physician · Amherst, MA
Michael Horwich, MD, PHD is a dermatology physician with a practice address in Amherst, Massachusetts, and NPI 1538470976, issued on Jun 30, 2010. Check the license (Massachusetts 258156, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael Horwich
- Credential
- MD, PHD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 258156 MA
Self-reported in NPPES; status is on the state search - Practice location
- 29B Cottage St, Amherst, MA 01002
- Phone
- (413) 549-7400
- Enumerated
- Jun 30, 2010
- Entity
- Type 1 · individual
Also registered at 29B Cottage St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Victoria Lucas, PA-CMedical Physician Assistant1396398251
- Richard Wyatt, MDDermatology Physician1568447613
Verify Michael Horwich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 258156Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
One hospital or facility affiliation
- Pioneer Valley Dermatology PCAmherst, MA
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.
Dermatology Physician providers in Massachusetts
There are 557 dermatology physician records in Massachusetts.
Other dermatology physician records in Massachusetts
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- David Aghassi, MDWellesley, MA1285698936
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- Abdullah Alajaji, MDBoston, MA1356698351
- Rhoda Alani, M.D.Boston, MA1154385268
- Christina Alavian, M.D.Worcester, MA1356376461
- Lee Albert, MDMilford, MA1619974102
- Abdullah Aleisa, M.D.Boston, MA1376996199
- Bader AlharbiBoston, MA1932021771
Common questions
What is Michael Horwich, MD, PHD's NPI number?
Michael Horwich, MD, PHD's National Provider Identifier (NPI) is 1538470976, issued on Jun 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Michael Horwich, MD, PHD located?
The NPPES record lists a practice address at 29B Cottage St, Amherst, MA, 01002. Phone: (413) 549-7400. Providers update this record themselves, so call before visiting.
How can I verify Michael Horwich, MD, PHD's license?
NPPES lists Massachusetts license number 258156, 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.
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.