Ronald Siwoff, O.D.
Low Vision Rehabilitation Optometrist · Denville, NJ
Ronald Siwoff, O.D. is a low vision rehabilitation optometrist with a practice address in Denville, New Jersey, and NPI 1013914175, issued on Jul 5, 2005. Check the license (New Jersey 27OA003818, as entered in NPPES) with the New Jersey board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ronald Siwoff
- Credential
- O.D.
- Primary taxonomy
- Low Vision Rehabilitation Optometrist 152WL0500X
- License number
- 27OA003818 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 75 Bloomfield Ave, Denville, NJ 07834
- Phone
- (973) 627-7787
- Enumerated
- Jul 5, 2005
- Record last updated
- May 28, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (973) 627-7701
- Medicare enrollment
- Enrolled (PECOS I20111214000031); may accept Medicare assignment
- Medical or professional school
- New England College Of Optometry, 1977
- Entity
- Type 1 · individual
6 nearest low vision rehabilitation optometrist records → All 7 in New Jersey → Look up another NPI →
Also registered at 75 Bloomfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald Siwoff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Jersey board licenses this profession
Search for license 27OA003818Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average low vision rehabilitation optometrist in 2024
161 Medicare Part D claims for 27 beneficiaries, against an average of 268 among the 86 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Travoprost44 claims
- Latanoprost38 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.
Industry payments in 2024: $378.70
5 payments; by number, the most common kind was food and beverage; the largest payer was Sun Pharmaceutical Industries Inc. The 86 providers of this specialty with any payment received $1,112.70 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.
Low Vision Rehabilitation Optometrist providers in New Jersey
There are 7 low vision rehabilitation optometrist records in New Jersey.
All 7 in New Jersey → Every provider in Denville → Low Vision Rehabilitation Optometrist nationwide →
The 6 low vision rehabilitation optometrist records with the nearest ZIP codes
- Vincent Vicci, ODWestfield, NJ 070901184781213
- Fazaluddin Hashmi, O.DLinden, NJ 070361083095582
- Janis White, O.D.East Orange, NJ 070181184643934
- Maria Richman, ODManasquan, NJ 087361154306264
- Biren DoshiEast Brunswick, NJ 088161962925537
- Jeff Schaeffer, O.D.Perth Amboy, NJ 088611295742633
Common questions
What is Ronald Siwoff, O.D.'s NPI number?
Ronald Siwoff, O.D.'s National Provider Identifier (NPI) is 1013914175, issued on Jul 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Siwoff, O.D. located?
The NPPES record lists a practice address at 75 Bloomfield Ave, Denville, NJ, 07834. Phone: (973) 627-7787. Providers update this record themselves, so call before visiting.
How can I verify Ronald Siwoff, O.D.'s license?
NPPES lists New Jersey license number 27OA003818, as entered by the provider. Search the New Jersey board that licenses this profession; the NPPES record confirms identity only.
How much does Ronald Siwoff, O.D. prescribe under Medicare Part D?
In 2024, Ronald Siwoff, O.D. had 161 Medicare Part D claims for 27 beneficiaries; the average among low vision rehabilitation optometrist prescribers was 268. 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.