NPPES file of Aug 9, 2026

Nephrology Physician in Massachusetts

417 NPPES records list nephrology physician with a practice address in Massachusetts, 6 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 7 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RN0300X · 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, 206

  1. Boston206
  2. Worcester42
  3. Springfield17
  4. Burlington14
  5. Fall River8

Nephrology Physician records in Massachusetts

  1. Salah Reyad, MDNorwood, MA 020621730294752
  2. Eugene Rhee, MDBoston, MA 021141821064056
  3. Cristian Riella, M.D.Boston, MA 022151730492042
  4. Ian Rifkin, M.D., PHDWest Roxbury, MA 021321043299944
  5. Katherine Rizzolo, M.D.Boston, MA 021181154775070
  6. Emily Robinson, M.D.Foxboro, MA 020351245297449
  7. Sylvia Rosas, MDBoston, MA 022151568497600
  8. Henry Rose, M.D.Pittsfield, MA 012011083600084
  9. Leorah Ross, M.D.Cambridge, MA 021391376525782
  10. Jeffrey Rubel, MDBeverly, MA 019151508873670
  11. Kassem Safa, M.DBoston, MA 021141336397231
  12. Rania Salam, MDNorth Andover, MA 018451053932780
  13. David Salant, MDBoston, MA 021181083685093
  14. Danielle Saly, M.D.Boston, MA 021141962814111
  15. Sandipani Sandilya, MDBurlington, MA 018051821376609
  16. Mark Sarnak, M.D.Boston, MA 021111982641502
  17. Mohamed Sayegh, MDBoston, MA 021151114939147
  18. Ronen Schneider, MDBoston, MA 021151881268829
  19. Ruth Schulman, MDBrighton, MA 021351689037087
  20. Aylit Schultz, MDWest Roxbury, MA 021321518981950
  21. John Schwartz, MDBoston, MA 021181629026737
  22. Jonathon Schwartz, MDCambridge, MA 021381689644932
  23. Harish Shanthanu SeethapathyBoston, MA 021141013320209
  24. Adam Segal, M.D.Burlington, MA 018051164480810
  25. Franklin Segall, M.D.Andover, MA 018101861453573
  26. Umut Selamet, M.DBoston, MA 021181942488804
  27. Nang San Hti Lar Seng, MDBoston, MA 022151619558533
  28. Sebastian Sepulveda, MDChelmsford, MA 018241558343129
  29. Cynthia Sfeir, MDBeverly, MA 019151396910063
  30. Shilpa Sharma, M.D MPHBoston, MA 021111710149166
  31. Moshe Shashar, MDBoston, MA 021181083979371
  32. Alice Sheridan, M.D.Boston, MA 021151023056397
  33. Dipak Sheth, MDBeverly, MA 019151740277052
  34. Himesh ShethFairhaven, MA 027191689060097
  35. David Shih, MDNorth Dartmouth, MA 027471134197429
  36. Michael Shih, M.D.Leominster, MA 014531598747024
  37. Mawya Shocair, M.D.Waltham, MA 024521457308140
  38. Deetu Simh, M.D.Worcester, MA 016081073704425
  39. Petra Simic, MD, PHDBoston, MA 021141780943878
  40. Ajay Singh, MDBoston, MA 021151376551382
  41. Meghan Sise, M.D.Boston, MA 021141003043571
  42. Mark Siskind, MDFall River, MA 027211508840612
  43. Thomas Slack, M.D.Wellfleet, MA 026671023040565
  44. Jonathan Slater, M.D.Springfield, MA 011071992788160
  45. Peter Soderland, MDBurlington, MA 018051760641922
  46. Harold Solomon, M.D.Chestnut Hill, MA 024671023006772
  47. Melinda Solomon, MDBoston, MA 021181104388610
  48. Young-Soo Song, M.D.Burlington, MA 018051679720221
  49. Ritu Soni, M.D.Worcester, MA 016551942464532
  50. Steven Spiegel, M.D.Natick, MA 017601669538591

Source: CMS NPPES, primary taxonomy 207RN0300X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia11.6
  2. Massachusetts6.0
  3. Maryland5.5
  4. New York5.4
  5. 50 states and D.C.4.0

Source: CMS NPPES, primary taxonomy 207RN0300X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

What the count covers

417 NPPES records list nephrology physician (207RN0300X) as their primary taxonomy with a practice address in Massachusetts: 6 per 100,000 residents against 4 nationally (50 states and D.C.). Boston has 206 of them (49%).

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. Georgia417
  2. North Carolina403
  3. New Jersey433
  4. Michigan376

States with a similar rate per 100,000

  1. Maryland5.5
  2. New York5.4
  3. Delaware5.0
  4. Pennsylvania5.0

The largest states

  1. California1,468
  2. Texas1,159
  3. New York1,049
  4. Florida840
  5. Pennsylvania651

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.