Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Ronald Siwoff, OD

Individual provider Low Vision Rehabilitation Optometrist · NPI 1013914175

Ronald Siwoff, OD is an 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
Phone: (973) 627-7787
Fax: (973) 627-7701
Show map & directions

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
Mailing address75 Bloomfield Ave, Suite 206, Denville, NJ 07834-2734

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

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