NPPES file of Aug 9, 2026

Gretchen Nicole Grossheim, FNP-C

Family Nurse Practitioner · Boston, MA

Gretchen Nicole Grossheim, FNP-C is a family nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1700644606, issued on Mar 6, 2024. Check the license (Massachusetts RN2298637, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1700644606
Name
Gretchen Nicole Grossheim
Credential
FNP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
RN2298637 MA
Self-reported in NPPES; status is on the state search
Practice location
1 Deaconess RD, Boston, MA 02215
Phone
(617) 667-7000
Enumerated
Mar 6, 2024
Record last updated
Mar 6, 2024
Medicare enrollment
Enrolled (PECOS I20250708003136); may accept 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 1 Deaconess RD

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

  1. Christina Abate, N.P.Family Nurse Practitioner1235414970
  2. Austin AdamsEmergency Medicine Physician1861139388
  3. Faisal AlfadhelNeuroradiology Physician1326692419
  4. Bree Alyeska, M.D.Emergency Medicine Physician1437597127
  5. Amanda Anastasi, M.D.Anesthesiology Physician1801820550
  6. Philip Anderson, M.D.Emergency Medicine Physician1477540235

Verify Gretchen Nicole Grossheim 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 RN2298637    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

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Gretchen Nicole Grossheim among 4,724 family nurse practitioner records in Massachusetts

Gretchen Nicole Grossheim, FNP-C 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 not. Its NPI, issued in 2024, is newer than 86% of them.

  • NPI issued2024 · 86% of these records are older, 8% newer
  • In a Medicare fileNo · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2023 · median 2019 among the 2,704 with a school on file
  • Record last updated2024 · 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).

938 family nurse practitioner records list a practice address in Boston

They are 938 of the 41,865 NPPES records with a practice address in Boston, and 4,724 family nurse practitioner records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

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

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Jennifer Brown, CNPBoston, MA 022151861460776
  2. Nicole Catatao, NPBoston, MA 022151588830160
  3. Nicole Desrosiers, N.P.Boston, MA 022151811167992
  4. Suzanne Dipalma, NPBoston, MA 022151669692455
  5. Thomas Doyle, FNPBoston, MA 022151912137191
  6. Cailin Duram, FNPBoston, MA 022151700110012
  7. Maressa FreitasBoston, MA 022151033342811
  8. Margaret Killebrew, NPBoston, MA 022151568509404

Common questions

What is Gretchen Nicole Grossheim, FNP-C's NPI number?

Gretchen Nicole Grossheim, FNP-C's National Provider Identifier (NPI) is 1700644606, issued on Mar 6, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Gretchen Nicole Grossheim, FNP-C located?

The NPPES record lists a practice address at 1 Deaconess RD, Boston, MA, 02215. Phone: (617) 667-7000. Providers update this record themselves, so call before visiting.

How can I verify Gretchen Nicole Grossheim, FNP-C's license?

NPPES lists Massachusetts license number RN2298637, 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. 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.