NPPES file of Aug 9, 2026

Caroline Hathaway Louttit

Family Nurse Practitioner · Cambridge, MA

Caroline Hathaway Louttit is a family nurse practitioner with a practice address in Cambridge, Massachusetts, and NPI 1770202772, issued on Aug 23, 2022. Check the license (Massachusetts RN2352873, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1770202772
Name
Caroline Hathaway Louttit
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
RN2352873 MA
Self-reported in NPPES; status is on the state search
Practice location
1611 Cambridge St, Cambridge, MA 02138
Phone
(617) 657-6430
Enumerated
Aug 23, 2022
Record last updated
Jan 8, 2026
Medicare enrollment
Enrolled (PECOS I20251231000989); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →

Also registered at 1611 Cambridge St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Irina Angel, MDPsychiatry Physician1023058419
  2. Robert Atkind, MDInternal Medicine Physician1831236405
  3. Margaret Barsam, M.D.Pediatrics Physician1598747412
  4. Melissa Bergman, MDPediatrics Physician1467618033
  5. Aaron BirnbaumInternal Medicine Physician1023645249
  6. Alan Brush, M.D.Internal Medicine Physician1043281942

Verify Caroline Hathaway Louttit in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN2352873    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Atrius Health IncNeedham, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Caroline Hathaway Louttit among 4,724 family nurse practitioner records in Massachusetts

Caroline Hathaway Louttit is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 72% of them.

  • NPI issued2022 · 72% of these records are older, 21% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2019 · median 2019 among the 2,704 with a school on file
  • Record last updated2026 · 42% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

68 family nurse practitioner records list a practice address in Cambridge

They are 68 of the 5,145 NPPES records with a practice address in Cambridge, and 4,724 family nurse practitioner records in Massachusetts.

All 4,724 in Massachusetts → Every provider in Cambridge → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Wyatt Biel, FNPCambridge, MA 021381801076831
  2. Carol Browne, NPCambridge, MA 021381093758427
  3. Kristen Ferreira, FNP-BCCambridge, MA 021381013975424
  4. Jenna Foley, NPCambridge, MA 021381053651562
  5. Shirley Gillies, NPCambridge, MA 021381801854849
  6. Derek Lichter, FNP-BCCambridge, MA 021381578700563
  7. Kristen Lipresti, FNPCambridge, MA 021381629495379
  8. Lisa Luz, FNP-BCCambridge, MA 021381659394435

Common questions

What is Caroline Hathaway Louttit's NPI number?

Caroline Hathaway Louttit's National Provider Identifier (NPI) is 1770202772, issued on Aug 23, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Caroline Hathaway Louttit located?

The NPPES record lists a practice address at 1611 Cambridge St, Cambridge, MA, 02138. Phone: (617) 657-6430. Providers update this record themselves, so call before visiting.

How can I verify Caroline Hathaway Louttit's license?

NPPES lists Massachusetts license number RN2352873, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.

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

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.