Courtney Nagel Sandler, M.D.
Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Courtney Nagel Sandler, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Boston, Massachusetts, and NPI 1164746178, issued on Mar 19, 2010. Check the license (Massachusetts 275280, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Courtney Nagel Sandler
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 275280 MA
Self-reported in NPPES; status is on the state search - Practice location
- 221 Longwood Ave # Rfb2, Boston, MA 02115
- Phone
- (617) 732-5666
- Enumerated
- Mar 19, 2010
- Record last updated
- Nov 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (617) 525-0436
- Medicare enrollment
- Enrolled (PECOS I20180917000068); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 221 Longwood Ave # Rfb2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nathalie Anne De Oliveira E Silva De Morais, MDStudent in an Organized Health Care Education/Training Program1053175687
Verify Courtney Nagel Sandler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 275280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,106 Medicare Part D claims for 204 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.
Most prescribed
- Levothyroxine Sodium114 claims
- Ozempic105 claims
- Hydrocortisone62 claims
- Trulicity62 claims
- Jardiance56 claims
- Mounjaro52 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Atrius Health IncNeedham, MA
- Children's Hospital Pediatric Associates, IncNorwood, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Courtney Nagel Sandler among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Courtney Nagel Sandler, M.D. is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 69% of them.
- NPI issued2010 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2010 · median 2002 among the 378 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Boston → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Gail Adler, MD PHDBoston, MA 021151780675280
- Shehzad Basaria, MDBoston, MA 021151699730101
- Edward Brown, MDBoston, MA 021151871550137
- Margo Hudson, MDBoston, MA 021151922065242
- Ursula Kaiser, MDBoston, MA 021151053377374
- Nikheel Kolatkar, M.D.Boston, MA 021151396748463
- P Larsen, MDBoston, MA 021151700842952
- Meryl Leboff, MDBoston, MA 021151235106030
Common questions
What is Courtney Nagel Sandler, M.D.'s NPI number?
Courtney Nagel Sandler, M.D.'s National Provider Identifier (NPI) is 1164746178, issued on Mar 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Courtney Nagel Sandler, M.D. located?
The NPPES record lists a practice address at 221 Longwood Ave # Rfb2, Boston, MA, 02115. Phone: (617) 732-5666. Providers update this record themselves, so call before visiting.
How can I verify Courtney Nagel Sandler, M.D.'s license?
NPPES lists Massachusetts license number 275280, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Courtney Nagel Sandler, M.D. prescribe under Medicare Part D?
In 2024, Courtney Nagel Sandler, M.D. had 1,106 Medicare Part D claims for 204 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions 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.
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.