NPPES file of Aug 9, 2026

Psychologist in Massachusetts

2,367 NPPES records list psychologist with a practice address in Massachusetts, 34 per 100,000 residents, the 3rd highest rate of 51. Boston and Cambridge have the most; each record links to the provider's NPI and the Massachusetts license search. Page 40 of 48.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 103T00000X · 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, 457

  1. Boston457
  2. Cambridge184
  3. Brookline98
  4. Worcester81
  5. Newton79

Psychologist records in Massachusetts

  1. Gary SimpsonMashpee, MA 026491649472697
  2. Carol Singer, ED DNewton Highlands, MA 024611336112796
  3. Jayne Singer, PH.D.Boston, MA 021151053427146
  4. Judith Singer, PHDLexington, MA 024211457419376
  5. Monica SinopoliWeymouth, MA 021891538906581
  6. Anthony Siracusa, PH.D.Lanesborough, MA 012371851382808
  7. Maria SiroisLenox, MA 012401275121378
  8. Alan Sirota, PHDMansfield, MA 020481487631347
  9. Olivia Skalski, PSY.D.Worcester, MA 016051558818443
  10. Kenneth Sklar, LICSW, ED.D.Salem, MA 019701477679090
  11. Jeffrey Skowron, PH.D.Worcester, MA 016051538401674
  12. Charles Slagen, PH.D.Lexington, MA 024211659343580
  13. Stephen Slaten, PH.D.Worcester, MA 016091487703641
  14. Pamela Slater, PH.D.Wellesley, MA 024821295951945
  15. Julia Slatkin, PHDConcord, MA 017421265831739
  16. Ellen Slawsby, PHDChestnut Hill, MA 024671477666329
  17. Carole Slipowitz, BOTH PSY.D.AND LICSWNewton, MA 024591003039942
  18. Ryan SliwakBoston, MA 021291326887423
  19. Catherine SmailLawrence, MA 018431821422304
  20. Katharine Smidt, PHDBedford, MA 017301609369701
  21. Morgan SmigielskiBoston, MA 022151184239808
  22. Alla Smirnova, PSY.D.Milford, MA 017571366575474
  23. Alan Smith, SC.D.Burlington, MA 018031669569703
  24. Alma Smith, PH.D.Boston, MA 022151790887842
  25. Bradford Smith, PH.D.Beverly, MA 019151477522555
  26. Colborn Smith, PH.D.Amherst, MA 010021629406236
  27. Cornelia SmithCambridge, MA 021401871625640
  28. Douglas Smith, PSY.D.Palmer, MA 010691366727190
  29. Elizabeth Smith, PH.D.Natick, MA 017601508374802
  30. Molly Smith, PH DReading, MA 018671487794970
  31. Carla Smith Picariello, PH.D.Arlington, MA 024761407024193
  32. Mills Smith-Millman, PHDCambridge, MA 021381780290189
  33. Aimee Smrz, PHDPeabody, MA 019601912953480
  34. Debborah Smyth, PHDAuburn, MA 015011013238864
  35. Nuanprang Snitbhan, PSYDBoston, MA 021181932515848
  36. Ivar Snorrason, PHDBoston, MA 021141285292565
  37. Anne Snow Gallagher, PHDBoston, MA 022151972875037
  38. Jane Snyder, PH.D.Brookline, MA 024461699823294
  39. Sara Snyder, PSYD, MPH, MACambridge, MA 021391750963757
  40. Juliet Sobering, PH.D.Lynnfield, MA 019401366294902
  41. Vivian Sockol, ED.DFranklin, MA 020381922426170
  42. Stephanie Sogg, PHDBoston, MA 021141518949726
  43. Laurie Sokolsky, PSY.D.Cambridge, MA 021401891839338
  44. Judy Solman, PSY.D.Roslindale, MA 021311548327554
  45. Lisa Solomon, PHDCharlestown, MA 021291215928858
  46. Janis Soma, PH.D.Braintree, MA 021841356329031
  47. Harry Somers, EDDNorth Andover, MA 018451386736163
  48. James Sorensen, EDDPlymouth, MA 023601700995776
  49. Scott Sorg, PHDBoston, MA 021141609535012
  50. Charles Sorrentino, PHDSalem, MA 019701982796298

Source: CMS NPPES, primary taxonomy 103T00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 3 of 51 per resident

  1. District of Columbia49
  2. Vermont40
  3. Massachusetts34
  4. Minnesota30
  5. New York26
  6. 50 states and D.C.14

Source: CMS NPPES, primary taxonomy 103T00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

10.9% of these records appear in a Medicare file, against 10.1% 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. Massachusetts10.9%
  2. United States10.1%

Psychologist records in Massachusetts, measured

  • In a Medicare file258 of 2,367 · 10.9% here, 10.1% nationally
  • In the CMS Doctors and Clinicians file487 · 20.6% here, 18.0% nationally
  • Not updated in five years or more1,608 · 67.9% here, 63.9% nationally
  • Median graduation year1997 · the 487 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 103T00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,367 NPPES records list psychologist (103T00000X) as their primary taxonomy with a practice address in Massachusetts: 34 per 100,000 residents against 14 nationally (50 states and D.C.). Boston has 457 of them (19%).

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. Florida2,202
  2. Michigan2,549
  3. Texas2,141
  4. Pennsylvania2,687

States with a similar rate per 100,000

  1. Puerto Rico36.4
  2. Minnesota29.5
  3. Vermont40.2
  4. New York25.8

The largest states

  1. California7,304
  2. New York5,045
  3. Pennsylvania2,687
  4. Michigan2,549
  5. Florida2,202

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.