Joshua Ong
Ophthalmology Physician · Boston, MA
Joshua Ong is an ophthalmology physician with a practice address in Boston, Massachusetts, and NPI 1194461657, issued on May 9, 2022. Check the license (Massachusetts 1026334, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joshua Ong
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 1026334 MA
Self-reported in NPPES; status is on the state search - Practice location
- 243 Charles St, Boston, MA 02114
- Phone
- (617) 573-4443
- Enumerated
- May 9, 2022
- Record last updated
- Jul 1, 2026
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 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 Joshua Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1026334Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average ophthalmology physician in 2024
386 Medicare Part D claims for 134 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Latanoprost67 claims
- Prednisolone Acetate40 claims
- Timolol Maleate37 claims
- Dorzolamide-Timolol28 claims
- Ofloxacin28 claims
- Fluorometholone20 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.
Joshua Ong among 791 ophthalmology physician records in Massachusetts
Joshua Ong is one of 791 ophthalmology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 3% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2026 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Massachusetts
There are 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Boston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Sandra Cremers, MDBoston, MA 021141588654040
- Thaddeus Dryja, MDBoston, MA 021141619961968
- Suzanne Freitag, MDBoston, MA 021141710974464
- Matthew Gardiner, MDBoston, MA 021141366432833
- Deeba Husain, MDBoston, MA 021141952397697
- Ula Jurkunas, MDBoston, MA 021141386634699
- Ivana Kim, M.D.Boston, MA 021141851381933
- Peter Lou, MDBoston, MA 021141316937709
Common questions
What is Joshua Ong's NPI number?
Joshua Ong's National Provider Identifier (NPI) is 1194461657, issued on May 9, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Ong located?
The NPPES record lists a practice address at 243 Charles St, Boston, MA, 02114. Phone: (617) 573-4443. Providers update this record themselves, so call before visiting.
How can I verify Joshua Ong's license?
NPPES lists Massachusetts license number 1026334, 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 Joshua Ong prescribe under Medicare Part D?
In 2024, Joshua Ong had 386 Medicare Part D claims for 134 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.