Dr Ronald Keith Willenborg, MD - Medicare Internal Medicine in Upper Montclair, NJ

  1. Home
  2. Internal Medicine
  3. NJ
  4. Upper Montclair
Dr Ronald Keith Willenborg, MD is a medicare enrolled "Internal Medicine" physician in Upper Montclair, New Jersey. His current practice location is 543 Valley Rd Ste 4, Upper Montclair, New Jersey. You can reach out to his office (for appointments etc.) via phone at (973) 746-6466.

Dr Ronald Keith Willenborg is licensed to practice in New Jersey (license number 25MA03592100) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1801897897.

Contact Information

Dr Ronald Keith Willenborg, MD
543 Valley Rd Ste 4,
Upper Montclair, NJ 07043-1844
(973) 746-6466
(973) 746-0312

Map and Direction




Physician's Profile

Full NameDr Ronald Keith Willenborg
GenderMale
SpecialityInternal Medicine
Location543 Valley Rd Ste 4, Upper Montclair, New Jersey
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1801897897
  • Provider Enumeration Date: 08/02/2005
  • Last Update Date: 07/14/2010
  Medicare PECOS Information:
  • PECOS PAC ID: 3476553116
  • Enrollment ID: I20070103000465

Medical Identifiers

Medical identifiers for Dr Ronald Keith Willenborg such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1801897897NPI-NPPES
P3601332OtherNJOXFORD HEALTH
3213803MedicaidNJ
0004574647OtherNJAETNA
001130735OtherNJUNITED HEALTHCARE
31D08OtherNYEMPIRE BLUE SHIELD
OK0464OtherNJHEALTH NET
8971366OtherNJCIGNA
NJ3106OtherNJFIRST HEALTH
110009806OtherRAILROAD MEDICARE
J2407OtherNJHORIZON BLUE CROSS/SHIELD

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 25MA03592100 (New Jersey)Primary

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Ronald Keith Willenborg is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Ronald Keith Willenborg, MD
543 Valley Rd Ste 4,
Upper Montclair, NJ 07043-1844

Ph: (973) 746-6466		Dr Ronald Keith Willenborg, MD
543 Valley Rd Ste 4,
Upper Montclair, NJ 07043-1844

Ph: (973) 746-6466

Reviews and Comments


Internal Medicine Doctors in Upper Montclair, NJ

Dr. Ernest Joseph Desalvo, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 7 Norman Rd, Upper Montclair, NJ 07043
Phone: 973-746-3181    
Mrs. Dorothy J Margolskee, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 306 Upper Mountain Ave, Upper Montclair, NJ 07043
Phone: 973-744-5179    Fax: 973-744-6353

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.