Gillian Ruth Diercks, M.D.
Pediatric Otolaryngology Physician · Boston, MA
Gillian Ruth Diercks, M.D. is a pediatric otolaryngology physician with a practice address in Boston, Massachusetts, and NPI 1255573515, issued on Apr 1, 2009. Check the license (Massachusetts 266714, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Gillian Ruth Diercks
- Credential
- M.D.
- Primary taxonomy
- Pediatric Otolaryngology Physician 207YP0228X
- License number
- 266714 MA
Self-reported in NPPES; status is on the state search - Practice location
- 243 Charles St, Boston, MA 02114
- Phone
- (617) 573-3190
- Enumerated
- Apr 1, 2009
- Record last updated
- Nov 8, 2023
- Medicare enrollment
- Enrolled (PECOS I20160901001699); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2009
- Entity
- Type 1 · individual
8 nearest pediatric otolaryngology physician records → All 27 in Massachusetts → Look up another NPI →
Also registered at 243 Charles St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bardia AbbasiNeurology Physician1629429543
- Dunia Abdul-Aziz, MDOtolaryngology Physician1487880985
- Hasan Abdulbaki, MDStudent in an Organized Health Care Education/Training Program1811790512
- Inas Aboobakar, M.D.Ophthalmology Physician1760846265
- Jihad Achkar, M.D.Otolaryngology Physician1811203763
- Alessandro Adad Jammal, MD, PHDOphthalmology Physician1518725480
Verify Gillian Ruth Diercks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 266714Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Massachusetts Eye And Ear Associates, IncNewton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gillian Ruth Diercks among 27 pediatric otolaryngology physician records in Massachusetts
Gillian Ruth Diercks, M.D. is one of 27 pediatric otolaryngology physician records with a practice address in Massachusetts. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 37% of them.
- NPI issued2009 · 37% of these records are older, 52% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2009 · median 2006 among the 14 with a school on file
- Record last updated2023 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207YP0228X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Otolaryngology Physician providers in Massachusetts
There are 27 pediatric otolaryngology physician records in Massachusetts.
All 27 in Massachusetts → Every provider in Boston → Pediatric Otolaryngology Physician nationwide →
The 8 pediatric otolaryngology physician records with the nearest ZIP codes
- Michael Cohen, M.D.Boston, MA 021141649435561
- Michael Cunningham, M.D.Boston, MA 021141811988181
- Christopher Hartnick, MDBoston, MA 021141972593242
- Donald Keamy, M.D.,M.P.H.Boston, MA 021141568453660
- Leila Mankarious, M.D.Boston, MA 021141891786901
- Andrew Scott, M.D.Boston, MA 021141457567471
- E' Ching Shih, MBBSBoston, MA 021141558199521
- Jacob Brodsky, M.D.Boston, MA 021151487819785
Common questions
What is Gillian Ruth Diercks, M.D.'s NPI number?
Gillian Ruth Diercks, M.D.'s National Provider Identifier (NPI) is 1255573515, issued on Apr 1, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Gillian Ruth Diercks, M.D. located?
The NPPES record lists a practice address at 243 Charles St, Boston, MA, 02114. Phone: (617) 573-3190. Providers update this record themselves, so call before visiting.
How can I verify Gillian Ruth Diercks, M.D.'s license?
NPPES lists Massachusetts license number 266714, 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.
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.