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 133 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. Beverly Woo, MDBoston, MA 021151376630830
  2. Elaine Woo, MDBoston, MA 021141780650648
  3. Elizabeth Wood, M.D.Chestnut Hill, MA 024671801927744
  4. Karen Wood, M.D.Boston, MA 021161659329506
  5. Warren Wood, MDFall River, MA 027201285621300
  6. Darryl Woods, MDBoston, MA 021181508882341
  7. Deirdre Woods, MDCambridge, MA 021381306848528
  8. Elliot Woods, MD, PHDBoston, MA 021141417416686
  9. Meghan Woodsum, MDNewton, MA 024621760063093
  10. Monica Woodward, M.D.Milford, MA 017571992717912
  11. Stephanie WoolhandlerCambridge, MA 021391558424226
  12. Jason Worcester, M.D.Boston, MA 021181326010497
  13. Sarah Workman, M.D.Springfield, MA 011991487869384
  14. Hillary Worthen, MDSomerville, MA 021431215146915
  15. Elizabeth Wozniak, M.D.Brighton, MA 021351730529140
  16. Katherine Wrenn, M.D.Boston, MA 022151902127673
  17. Douglas Wright, MD PHDBoston, MA 021141508856311
  18. Joseph Wright, MDBoston, MA 021181366619009
  19. Paul Wright, M.D.Hopkinton, MA 017481356331318
  20. Emily Wroe, M.D.Boston, MA 021151033439922
  21. Amos WuBoston, MA 021181043907264
  22. Bechien Wu, M.D.Boston, MA 022151235246828
  23. Charlotte Wu, MDBoston, MA 021181518125871
  24. Emily Wu, M.D.East Boston, MA 021281174597959
  25. Ian Wu, M.D.Brockton, MA 023011528225745
  26. Iris Wu, MDBoston, MA 021151750071247
  27. Jeffrey Wu, MDChestnut Hill, MA 024671922117290
  28. Julie Wu, M.D.Cambridge, MA 021381477705770
  29. Martha Wu, M.D.Wellesley, MA 024811912954702
  30. Regina Wu, MDDedham, MA 020261629075254
  31. Richard Wu, MDSouth Deerfield, MA 013731598783094
  32. Robert Wu, MDBoston, MA 021111790713824
  33. Samantha Wu, MDBoston, MA 021141245611896
  34. Tong Wu, MDSalem, MA 019701750837712
  35. Vania Wu, DOWorcester, MA 016051942876073
  36. Wanda Wu, MDBoston, MA 022151336888627
  37. Xia Wu, M.D.Boston, MA 021141942945621
  38. Xun WuBoston, MA 021111942650569
  39. Yichao Wu, M.D.Marlborough, MA 017521437443793
  40. Yin Wu, MDWeymouth, MA 021901336565811
  41. Yingfei WuBoston, MA 022151962022277
  42. Yung-Chen Wu, MDFramingham, MA 017021053055533
  43. Gerburg Wulf, M.D.Boston, MA 021151174570402
  44. Laura Wung, MDBoston, MA 021181700894409
  45. Adam Wychowski, M.D.Springfield, MA 011071003806902
  46. David Wyler, M.D.Newton, MA 024621689657686
  47. Timothy Wymer, M.D.North Chelmsford, MA 018631376937268
  48. Dean Xerras, MDChelsea, MA 021501750363768
  49. Young Kevin Xia, M.D.Milford, MA 017571669859534
  50. Yun Xia, MDTaunton, MA 027801104188747

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.