Cally Gwon, M.D.
Pediatrics Physician · Newton, MA
Cally Gwon, M.D. is a pediatrics physician with a practice address in Newton, Massachusetts, and NPI 1285690941, issued on Apr 21, 2006. Check the license (Massachusetts 204508, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Cally Gwon
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 204508 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2000 Washington St, Newton, MA 02462
- Phone
- (617) 965-6700
- Enumerated
- Apr 21, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (617) 965-5239
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 2,628 in Massachusetts → Look up another NPI →
Also registered at 2000 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Laurence Bailen, M.D.Hepatology Physician1922078930
- J Bak, MDPediatrics Physician1346312089
- Thomas BeattyObstetrics & Gynecology Physician1689658379
Verify Cally Gwon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 204508Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $60.39
3 payments; by number, the most common kind was food and beverage; the largest payer was Seqirus USA Inc. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Cally Gwon among 2,628 pediatrics physician records in Massachusetts
Cally Gwon, M.D. is one of 2,628 pediatrics physician records with a practice address in Massachusetts. 25% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 48% newer
- In a Medicare fileYes · 25% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 pediatrics physician records list a practice address in Newton
They are 24 of the 2,975 NPPES records with a practice address in Newton, and 2,628 pediatrics physician records in Massachusetts.
All 2,628 in Massachusetts → Every provider in Newton → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- J Bak, MDNewton, MA 024621346312089
- Joel Bass, MDNewton, MA 024621427025444
- Heather Davidson, M.D.Newton, MA 024621740246511
- Michael Elkort, M.D.Newton, MA 024621811937345
- Mary-Jean Fanelli, MD, MBANewton, MA 024621780650267
- Hilda Gartley, MDNewton, MA 024621568509594
- Brinda Gupta, MDNewton, MA 024621003889601
- Eileen Kramer, M.D.Newton, MA 024621841237039
Common questions
What is Cally Gwon, M.D.'s NPI number?
Cally Gwon, M.D.'s National Provider Identifier (NPI) is 1285690941, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cally Gwon, M.D. located?
The NPPES record lists a practice address at 2000 Washington St, Newton, MA, 02462. Phone: (617) 965-6700. Providers update this record themselves, so call before visiting.
How can I verify Cally Gwon, M.D.'s license?
NPPES lists Massachusetts license number 204508, 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.