NPPES file of Aug 9, 2026

Internal Medicine Physician in Massachusetts

6,825 NPPES records list internal medicine physician with a practice address in Massachusetts, 97 per 100,000 residents, the 2nd highest rate of 51. Boston and Worcester have the most; each record links to the provider's NPI and the Massachusetts license search. Page 137 of 137.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · method

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

Boston has the most, 2,320

  1. Boston2,320
  2. Worcester448
  3. Cambridge300
  4. Springfield282
  5. Burlington144

Internal Medicine Physician records in Massachusetts

  1. Nantthasorn Zinboonyahgoon, M.D.Boston, MA 021151255626214
  2. Kenneth Zinn, MDIpswich, MA 019381700890241
  3. James Zipagan, M.D.Springfield, MA 011041629265947
  4. Joshua Ziperstein, MDBoston, MA 021141326333014
  5. Sokratis Zisis, MD, MSCFramingham, MA 017021912682600
  6. Michael Zito, M.D.Roslindale, MA 021311720105596
  7. George Zlota, MDNew Bedford, MA 027401134303456
  8. Anna Zlotina, M.D.Reading, MA 018671497762322
  9. Kayla Zomlefer, MDBoston, MA 021141376525915
  10. Christopher Zoppo, MDNewton, MA 024621477305332
  11. Joseph Zorn, M.D.Cambridge, MA 021381538127873
  12. Melissa Zorn, M.D.Wilmington, MA 018871295717114
  13. Megan ZouBoston, MA 021111053117069
  14. Tanya Zouzas, DOChelmsford, MA 018241952310302
  15. Patricia Zub, MDHopkinton, MA 017481811920572
  16. Camryn ZuchBoston, MA 021181720825938
  17. Deborah Zucker, MDCambridge, MA 021381740267541
  18. Marcia Zucker, MDBoston, MA 021141982682142
  19. Carol Zuckerman, M.D.Boston, MA 022151003864919
  20. Richard Zuflacht, MDPittsfield, MA 012011558377663
  21. Peter Zuromskis, M.D.Lexington, MA 024201306935978
  22. Lydia Zuser, M.D.Haverhill, MA 018301437150505
  23. Karl Zuzarte, MDFall River, MA 027201538161781
  24. Jasmin Zvornicanin, MDWorcester, MA 016551104405471
  25. Lisa ZywotBraintree, MA 021841700381357

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia133
  2. Massachusetts97
  3. Rhode Island94
  4. Connecticut73
  5. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.5% of these records appear in a Medicare file, against 78.7% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Massachusetts74.5%
  2. United States78.7%

Internal Medicine Physician records in Massachusetts, measured

  • In a Medicare file5,088 of 6,825 · 74.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file4,103 · 60.1% here, 61.4% nationally
  • Not updated in five years or more4,346 · 63.7% here, 55.4% nationally
  • Median graduation year2004 · the 4,103 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

6,825 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Massachusetts: 97 per 100,000 residents against 44 nationally (50 states and D.C.). Boston has 2,320 of them (34%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Illinois7,238
  2. Pennsylvania7,300
  3. Michigan5,735
  4. Ohio5,277

States with a similar rate per 100,000

  1. Rhode Island94.3
  2. Connecticut72.5
  3. Maryland63.2
  4. Hawaii62.9

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record 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.