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RONALD SIWOFF O.D.
NPI 1013914175
Optometrist - Low Vision Rehabilitation in Denville, NJ

Active since July 05, 2005Opted out of Medicare · through Jan 17, 2027
75 BLOOMFIELD AVE, SUITE 206, DENVILLE, NJ 07834(973) 627-7787(973) 627-7701 Get Directions Write a Review

NPPES record last updated: May 28, 2010. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Ronald Siwoff O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RONALD SIWOFF O.D. (NPI 1013914175) is an individual low vision rehabilitation provider in Denville, New Jersey, licensed in New Jersey (27OA003818) and active in the NPI registry since July 2005. He has opted out of Medicare through January 17, 2027 and is a graduate of New England College Of Optometry (1977).

NPPES Registry Identity

NPI1013914175
Entity TypeIndividualMale
Primary Taxonomy152WL0500X
Provider Legal NameRONALD SIWOFFCredential: O.D.
Location Address75 BLOOMFIELD AVE, SUITE 206Denville, NJ 07834-2734
Mailing Address75 Bloomfield Ave, Suite 206Denville, NJ 07834-2734 · (973) 627-7787 · Fax (973) 627-7701
Phone(973) 627-7787
Fax(973) 627-7701
Sole ProprietorYes
Medical School CMSNew England College Of OptometryGraduated 1977
Enumeration DateJuly 5, 2005
Last NPPES UpdateMay 28, 2010
✔ NPI 1013914175 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometrist · Low Vision RehabilitationEye and Vision Services Providers
Taxonomy Code152WL0500X
License✔ Licensed in NJ · 27OA003818
Definition

Optometrists who specialize in low-vision care having training to assess visual function, prescribe low-vision devices, develop treatment plans, and recommend other vision rehabilitation services.

75 BLOOMFIELD AVE, Denville, NJ 07834
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Other Identifiers 5

Other410047651NJ · Railroad Medicare
Medicare UPINU26862NJ
Other2795942NJ · Aetna
Other78022238353240NJ · Horizon Bc/bs
Medicare ID-Type Unspecified521315NJ

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Ronald Siwoff O.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 17, 2023 through January 17, 2027.

Opt-Out Effective DateJanuary 17, 2023
Opt-Out In Effect ThroughJanuary 17, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. GERALD I BRESNER DPM
Podiatrist
75 BLOOMFIELD AVE, SUITE 106
DENVILLE, NJ 07834
Morris County (973) 627-7090
DR. HAL H KIMOWITZ D.M.D.
Dentist (General Practice)
75 BLOOMFIELD AVE
DENVILLE, NJ 07834
Morris County (973) 627-3363
DR. KARL M ROBERTS D.C.
Chiropractor
75 BLOOMFIELD AVE, SUITE 201
DENVILLE, NJ 07834
Morris County (973) 983-1300
DR. ADAM SCOTT KIMOWITZ DMD
Dentist
75 BLOOMFIELD AVE, SUITE 205
DENVILLE, NJ 07834
Morris County (973) 627-3363
GERALD I BRESNER PC
Podiatrist (Primary Podiatric Medicine)
75 BLOOMFIELD AVE, STE 106
DENVILLE, NJ 07834
Morris County (973) 627-7090
MELISSA A. GIBERSON M.S.
Occupational Therapist (Hand)
75 BLOOMFIELD AVE, SUITE 102
DENVILLE, NJ 07834
Morris County (973) 664-9899
ADAM KIMOWITZ DMD LLC
Dentist (General Practice)
75 BLOOMFIELD AVE, SUITE 205
DENVILLE, NJ 07834
Morris County (973) 627-3363
SIWOFF LOW VISION CENTER, P.C.
Optometrist (Low Vision Rehabilitation)
75 BLOOMFIELD AVE, SUITE 206
DENVILLE, NJ 07834
Morris County (973) 627-7787

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronald Siwoff's NPI number?

The NPI number for Ronald Siwoff is 1013914175. It was assigned to this individual provider in the NPPES registry on July 5, 2005.

Where is Ronald Siwoff located?

Ronald Siwoff practices at 75 Bloomfield Ave Suite 206, Denville, NJ 07834. The listed phone number is (973) 627-7787.

What is Ronald Siwoff's specialty?

The primary specialty registered for this NPI is Optometrist, specializing in Low Vision Rehabilitation, with taxonomy code 152WL0500X.

Is Ronald Siwoff enrolled in Medicare?

No. Ronald Siwoff has opted out of Medicare through January 17, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Ronald Siwoff was last updated on May 28, 2010. NPI Profile syncs with the weekly NPPES data releases published by CMS.