1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Internal Medicine
  6. NPI Profile

DR. COURTNEY NAGEL SANDLER M.D.
NPI 1164746178
Internal Medicine - Endocrinology, Diabetes & Metabolism in Boston, MA

Active since March 19, 2010PECOS EnrolledAccepts Medicare Assignment
221 LONGWOOD AVE # RFB2, BOSTON, MA 02115(617) 732-5666(617) 525-0436 Get Directions Write a Review

NPPES record last updated: November 19, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 19, 2021, Sep 24, 2020, Sep 4, 2018 and 2 more (5 updates tracked since 2017).

About Dr. Courtney Nagel Sandler M.d. NPPES

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

DR. COURTNEY NAGEL SANDLER M.D. (NPI 1164746178) is an individual endocrinology, diabetes & metabolism provider in Boston, Massachusetts, licensed in Massachusetts (275280) and active in the NPI registry since March 2010. She is enrolled in Medicare PECOS, is affiliated with Brigham And Women's Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1164746178
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. COURTNEY NAGEL SANDLERCredential: M.D.
Location Address221 LONGWOOD AVE # RFB2Boston, MA 02115-5804
Mailing Address221 Longwood Ave # Rfb2Boston, MA 02115-5804 · (617) 732-5556 · Fax (617) 525-0436
Phone(617) 732-5666
Fax(617) 525-0436
Sole ProprietorNo
Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 2010
Enumeration DateMarch 19, 2010
Last NPPES UpdateNovember 19, 20215 updates tracked since enumeration
NPPES CertifiedNovember 19, 2021
✔ NPI 1164746178 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in MA · 275280
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
221 LONGWOOD AVE # RFB2, Boston, MA 02115
Open in Google Maps ↗

Other Names 1

Former Name (1)Dr. Courtney Jill Nagel

Secondary Practice Locations 2

Location 1100 Rockview St Apt 2Boston, MA 02130-2512 · Phone (732) 580-7669
Location 2333 Longwood AveBoston, MA 02115-5711 · Phone (617) 355-7476 · Fax (617) 730-0194

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Courtney Nagel Sandler M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID446477194
PECOS Enrollment IDI20180917000068
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

4

Medicare enrollment records show Courtney Sandler reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Children's Hospital Pediatric Associates, Inc
0.1 mi
Pediatrics
300 LONGWOOD AVE
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,358 clinicians in this Medicare group
NPI 1457306664 (617) 355-6000
Brigham & Womens Physicians Organization Inc
0.3 mi
Internal Medicine
75 FRANCIS ST
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 4,574 clinicians in this Medicare group
NPI 1033535497 (617) 732-5500
Dana-Farber Cancer Institute, Inc.
0.3 mi
General Acute Care Hospital
450 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,026 clinicians in this Medicare group
NPI 1851333686 (617) 632-3000
Atrius Health, Inc.
0.6 mi
Internal Medicine
133 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,317 clinicians in this Medicare group
NPI 1871639914 (617) 421-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
73 services66 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
32 services24 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
26 services26 patients
Creatinine level to test for kidney function or muscle injury 82570
A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.
14 services13 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
14 services13 patients
Total protein level, blood 84155
A total protein level blood test measures the amount of proteins in your blood. Proteins are essential for body functions, including immune response, tissue repair, and nutrient transportation. Abnormal levels may indicate certain diseases or conditions. It's a simple test involving a blood draw.
12 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 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
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
20 suppliers42 claims137 services$5.92 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
14 suppliers232 claims232 services$183.51 avg. paid by Medicare
Receiver (monitor), dedicated, for use with therapeutic glucose continuous monitor system K0554
DME-Other DME · category DE017N
1 supplier11 claims11 services$168.30 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

NATHALIE ANNE DE OLIVEIRA E SILVA DE MORAIS MD
Student in an Organized Health Care Education/Training Program
221 LONGWOOD AVE # RFB2
BOSTON, MA 02115
Suffolk County (617) 732-5666

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 Courtney Sandler's NPI number?

The NPI number for Courtney Sandler is 1164746178. It was assigned to this individual provider in the NPPES registry on March 19, 2010. The provider is also known as Dr. Courtney Jill Nagel.

Where is Courtney Sandler located?

Courtney Sandler practices at 221 Longwood Ave # Rfb2, Boston, MA 02115. The listed phone number is (617) 732-5666.

What is Courtney Sandler's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Courtney Sandler enrolled in Medicare?

Yes. Courtney Sandler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Courtney Sandler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Courtney Sandler reassigns Medicare benefits to 4 organizations: Children's Hospital Pediatric Associates, Inc (Boston, MA), Brigham & Womens Physicians Organization Inc (Boston, MA), Dana-Farber Cancer Institute, Inc. (Boston, MA) and Atrius Health, 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 Courtney Sandler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Courtney Sandler accept?

Health plans from Anthem Blue Cross and Blue Shield list Courtney Sandler as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Courtney Sandler affiliated with any hospitals?

According to CMS data, Courtney Sandler is affiliated with Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Courtney Sandler was last updated on November 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.