Nathan J. Abare, MD
Internal Medicine Physician · Springfield, MA
Nathan J. Abare, MD is an internal medicine physician with a practice address in Springfield, Massachusetts, and NPI 1386852747, issued on May 18, 2007. Check the license (Massachusetts 235479, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Nathan J. Abare
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 235479 MA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Wason Ave Ste 240, Springfield, MA 01107
- Phone
- (413) 794-9223
- Enumerated
- May 18, 2007
- Record last updated
- Jun 4, 2025
- Fax
- (413) 794-8361
- Medicare enrollment
- Enrolled (PECOS I20080726000146); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2005
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 100 Wason Ave Ste 240
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Oren Brody, DOInternal Medicine Physician1700091998
- Vaibhav Dingare, APRN, FNP-BCFamily Nurse Practitioner1134625684
- Terri Gardner, APRNAdult Health Nurse Practitioner1780747881
- Anika Opp-Harris, PA-CPhysician Assistant1134138563
- Soymi Serrano, NPAdult Health Nurse Practitioner1669982484
Verify Nathan J. Abare in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 235479Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
379 Medicare Part D claims for 172 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Gavilyte-G55 claims
- Amlodipine Besylate36 claims
- Losartan Potassium15 claims
- Methenamine Hippurate15 claims
- Fluoxetine Hcl13 claims
- Gabapentin13 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: $23.54
1 payment: food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Baystate Medical Practices IncSpringfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan J. Abare among 6,825 internal medicine physician records in Massachusetts
Nathan J. Abare, 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2005 · median 2004 among the 4,103 with a school on file
- Record last updated2025 · 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).
282 internal medicine physician records list a practice address in Springfield
They are 282 of the 8,553 NPPES records with a practice address in Springfield, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ronald Berger, MDSpringfield, MA 011071649263286
- Greta Boynton, M.D.Springfield, MA 011071801854773
- Elizabeth Eagleson, M.D.Springfield, MA 011071538139993
- John Egelhofer, MDSpringfield, MA 011071972595775
- David Fanti, MDSpringfield, MA 011071396737904
- Philip Gaziano, MDSpringfield, MA 011071043275001
- Howard Goldberg, M.D.Springfield, MA 011071457331050
- James Hession, MDSpringfield, MA 011071588656193
Common questions
What is Nathan J. Abare, MD's NPI number?
Nathan J. Abare, MD's National Provider Identifier (NPI) is 1386852747, issued on May 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Nathan J. Abare, MD located?
The NPPES record lists a practice address at 100 Wason Ave Ste 240, Springfield, MA, 01107. Phone: (413) 794-9223. Providers update this record themselves, so call before visiting.
How can I verify Nathan J. Abare, MD's license?
NPPES lists Massachusetts license number 235479, 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 Nathan J. Abare, MD prescribe under Medicare Part D?
In 2024, Nathan J. Abare, MD had 379 Medicare Part D claims for 172 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.