NPPES file of Aug 9, 2026

Daniel W. Weiswasser, M.D.

Internal Medicine Physician · Agawam, MA

Daniel W. Weiswasser, M.D. is an internal medicine physician with a practice address in Agawam, Massachusetts, and NPI 1437117462, issued on May 1, 2006. Check the license (Massachusetts 221130, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1437117462
Name
Daniel W. Weiswasser
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
221130 MA
Self-reported in NPPES; status is on the state search
Practice location
230 Main St, Agawam, MA 01001
Phone
(413) 789-8010
Enumerated
May 1, 2006
Record last updated
Feb 26, 2016 (not updated in 10 years: call before relying on the address or phone)
Fax
(413) 789-5171
Medicaid ID
2065142 MA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →

Also registered at 230 Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lourdes Beauzile-Delimon, MDPediatrics Physician1164689865
  2. Irene Cody, M.D.Internal Medicine Physician1912965468
  3. Michael Gillis, PA-CMedical Physician Assistant1487061016
  4. Gary Gorman, D.C.Chiropractor1528087822
  5. Christina Hayfron-Benjamin, MDInternal Medicine Physician1447350772
  6. Sean Hoffman, PA-CMedical Physician Assistant1811261555

Verify Daniel W. Weiswasser in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 221130    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

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Daniel W. Weiswasser among 6,825 internal medicine physician records in Massachusetts

Daniel W. Weiswasser, M.D. 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 not. Its NPI, issued in 2006, is newer than 12% of them.

  • NPI issued2006 · 12% of these records are older, 54% newer
  • In a Medicare fileNo · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 60% of these records are
  • Record last updated2016 · 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).

6 internal medicine physician records list a practice address in Agawam

They are 6 of the 233 NPPES records with a practice address in Agawam, and 6,825 internal medicine physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 6,825 in Massachusetts → Every provider in Agawam → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Irene Cody, M.D.Agawam, MA 010011912965468
  2. James Gallagher, MDAgawam, MA 010011801817325
  3. Christina Hayfron-Benjamin, MDAgawam, MA 010011447350772
  4. Matthew Kane, M.D.Agawam, MA 010011326001629
  5. Charles Weston, M.D.Agawam, MA 010011053379248
  6. Alan Berkenwald, MDAmherst, MA 010021033188636
  7. Lesley Harrington, MDAmherst, MA 010021326002833
  8. Samah Jafari, M.D.Amherst, MA 010021972757946

Common questions

What is Daniel W. Weiswasser, M.D.'s NPI number?

Daniel W. Weiswasser, M.D.'s National Provider Identifier (NPI) is 1437117462, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Daniel W. Weiswasser, M.D. located?

The NPPES record lists a practice address at 230 Main St, Agawam, MA, 01001. Phone: (413) 789-8010. Providers update this record themselves, so call before visiting.

How can I verify Daniel W. Weiswasser, M.D.'s license?

NPPES lists Massachusetts license number 221130, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.