GRETCHEN NICOLE GROSSHEIM FNP-C
NPI 1700644606
Nurse Practitioner - Family in Boston, MA
About Gretchen Nicole Grossheim Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRETCHEN NICOLE GROSSHEIM FNP-C (NPI 1700644606) is an individual family provider in Boston, Massachusetts, licensed in Massachusetts (RN2298637) and active in the NPI registry since March 2024. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gretchen Nicole Grossheim Fnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Gretchen Grossheim reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1093756629 (Massachusetts)
- 2,579 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gretchen Grossheim's NPI number?
The NPI number for Gretchen Grossheim is 1700644606. It was assigned to this individual provider in the NPPES registry on March 6, 2024.
Where is Gretchen Grossheim located?
Gretchen Grossheim practices at 1 Deaconess Rd, Boston, MA 02215. The listed phone number is (617) 667-7000.
What is Gretchen Grossheim's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Gretchen Grossheim enrolled in Medicare?
Yes. Gretchen Grossheim is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gretchen Grossheim's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Grossheim reassigns Medicare benefits to 2 organizations: Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gretchen Grossheim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gretchen Grossheim was last updated on March 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Gretchen Nicole Grossheim, FNP-C · NPI 1700644606
Family physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 6, 2024.
## Identity
- **NPI:** 1700644606 (Entity type: Individual)
- **Enumerated:** March 6, 2024
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** RN2298637 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1 DEACONESS RD, Boston, MA 02215-5321
- **Phone:** (617) 667-7000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1861216038, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 6, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1700644606) · Data from the CMS NPPES public registry.