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NANCY J SCHAEFFER NP
NPI 1427113067
Nurse Practitioner in Boston, MA

Active since December 26, 2006PECOS Enrolled
100 BLOSSOM STREET, COX 1 HEMATOLOGY ONCOLOGY ASSOCIATES, BOSTON, MA 02114(617) 726-8698 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Nancy J Schaeffer Np NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NANCY J SCHAEFFER NP (NPI 1427113067) is an individual nurse practitioner in Boston, Massachusetts, licensed in Massachusetts (117790) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427113067
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameNANCY J SCHAEFFERCredential: NP
Location Address100 BLOSSOM STREET, COX 1 HEMATOLOGY ONCOLOGY ASSOCIATESBoston, MA 02114
Mailing AddressPo Box 9142, Mass General Physicians Organization IncCharleston, MA 02129-9142 · (617) 724-0287
Phone(617) 726-8698
Sole ProprietorNo
Enumeration DateDecember 26, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1427113067 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in MA · 117790
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
100 BLOSSOM STREET, Boston, MA 02114
Open in Google Maps ↗

Other Identifiers 4

Medicaid0327301MA
OtherNP4264MA · Bs
Medicare ID-Type UnspecifiedNP4264MA
Medicare UPINP97078

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nancy J Schaeffer Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Nancy Schaeffer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
0.1 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
0.1 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000

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 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. THOMAS G ROBERTS JR. MD
Internal Medicine (Hematology & Oncology)
100 BLOSSOM STREET, COX 640 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Suffolk County (617) 726-7423
MR. MARC GILBERT BOLDUC LICSW, CADC II, CGP
Social Worker (Clinical)
100 BLOSSOM STREET, COX BUILDING, FIRST FLOOR
BOSTON, MA 02114
Suffolk County (617) 726-6185
DR. JOANNA M STRECK PHD
Psychologist
100 BLOSSOM STREET, COX 110
BOSTON, MA 02114
Suffolk County (617) 643-9977
DR. ALEENA BANERJI MD
Allergy & Immunology
100 BLOSSOM STREET, COX 201
BOSTON, MA 02114
Suffolk County (617) 726-3850
DR. ROBERT SACKSTEIN MD PHD
Internal Medicine
100 BLOSSOM STREET, HEMATOLOGY ONCOLOGY ASSOCIATES COX6
BOSTON, MA 02114
Suffolk County (617) 724-1124
DR. OTHON ILIOPOULOS MD
Internal Medicine (Medical Oncology)
100 BLOSSOM STREET, YAW 7 MASSACHUSETTS GENERAL HOSPITAL
BOSTON, MA 02114
Suffolk County (617) 724-3404
DR. BRUCE ALLAN CHABNER MD
Internal Medicine
100 BLOSSOM STREET, COX 640 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Suffolk County (617) 724-3200
SHANNON M MACDONALD MD
Radiology (Radiation Oncology)
100 BLOSSOM STREET, COX 3
BOSTON, MA 02114
Suffolk County (617) 724-8196

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 Nancy Schaeffer's NPI number?

The NPI number for Nancy Schaeffer is 1427113067. It was assigned to this individual provider in the NPPES registry on December 26, 2006.

Where is Nancy Schaeffer located?

Nancy Schaeffer practices at 100 Blossom Street Cox 1 Hematology Oncology Associates, Boston, MA 02114. The listed phone number is (617) 726-8698.

What is Nancy Schaeffer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Nancy Schaeffer enrolled in Medicare?

Yes. Nancy Schaeffer is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nancy Schaeffer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Schaeffer reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (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 Nancy Schaeffer'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 Nancy Schaeffer was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.