Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Ronald Siwoff, OD

Individual provider Low Vision Rehabilitation Optometrist · NPI 1013914175

Ronald Siwoff, OD is registered under Optometry in Denville, New Jersey. Graduated from New England College of Optometry in 1977, 49 years ago. Practices as a sole proprietor. Licensed in New Jersey.

Years since qualifying
49
Trained at
New England College of Optometry
Licensed in
NJ
In the registry since
2005
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

75 Bloomfield Ave Ste 206
Denville, NJ 07834-2734 Not confirmed with CMS for 16 years — call before visiting
Phone: (973) 627-7787
Fax: (973) 627-7701
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Low Vision Rehabilitation Optometrist (primary) Taxonomy 152WL0500X · Licence 27OA003818 (NJ)

Record details

NPI number1013914175
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedJuly 5, 2005
Last updated in NPPESMay 28, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolNEW ENGLAND COLLEGE OF OPTOMETRY
Graduated 1977 (49 years in practice)
Accepts Medicare assignment Not indicated

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $357 4 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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