David M. Slack, MD
Internal Medicine Physician · Easthampton, MA
David M. Slack, MD is an internal medicine physician with a practice address in Easthampton, Massachusetts, and NPI 1205895554, issued on Mar 23, 2006. Check the license (Massachusetts 72497, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- David M. Slack
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 72497 MA
Self-reported in NPPES; status is on the state search - Practice location
- 179 Northampton St, Easthampton, MA 01027
- Phone
- (413) 529-9300
- Enumerated
- Mar 23, 2006
- Record last updated
- Jun 17, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (413) 527-9793
- Medicaid ID
- 3066134 MA
- Medicare enrollment
- Enrolled (PECOS I20050406000335); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 179 Northampton St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael BelitskyCounselor1508591884
- Joann Berns, P.T.Orthopedic Physical Therapist1285791285
- Kaila BonaiutoPeer Specialist1639848856
- Shayna ColeSocial Worker1336760875
- Elizabeth CroweCounselor1306574322
- Jacqueline DeianaStudent in an Organized Health Care Education/Training Program1659291771
Verify David M. Slack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 72497Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average internal medicine physician in 2024
5,199 Medicare Part D claims for 422 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 590 claims were for opioids.
Most prescribed
- Atorvastatin Calcium297 claims
- Losartan Potassium229 claims
- Amlodipine Besylate216 claims
- Lisinopril197 claims
- Oxycodone-Acetaminophen185 claims
- Oxycodone Hcl184 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
- Valley Medical Group PCEasthampton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David M. Slack among 6,825 internal medicine physician records in Massachusetts
David M. Slack, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1985 · median 2004 among the 4,103 with a school on file
- Record last updated2008 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Massachusetts
There are 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Easthampton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mary Adler, M.D.Easthampton, MA 010271508894676
- Mark Bigda, DOEasthampton, MA 010271043292089
- David Ballan, MDEast Longmeadow, MA 010281174698542
- Muhammad Gul, MDEast Longmeadow, MA 010281144438193
- Talal Khan, M.D.East Longmeadow, MA 010281861406613
- Nidah Khan, M.D.East Longmeadow, MA 010281629418850
- Arthur McGuire, M.D.East Longmeadow, MA 010281861522302
- Chabilal Neergheen, MDEast Longmeadow, MA 010281932216215
Common questions
What is David M. Slack, MD's NPI number?
David M. Slack, MD's National Provider Identifier (NPI) is 1205895554, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David M. Slack, MD located?
The NPPES record lists a practice address at 179 Northampton St, Easthampton, MA, 01027. Phone: (413) 529-9300. Providers update this record themselves, so call before visiting.
How can I verify David M. Slack, MD's license?
NPPES lists Massachusetts license number 72497, 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 David M. Slack, MD prescribe under Medicare Part D?
In 2024, David M. Slack, MD had 5,199 Medicare Part D claims for 422 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.