Abigail Nelken, - Medicare Dietitian in Passaic, NJ

Abigail Nelken, is a medicare enrolled "Dietitian, Registered" provider in Passaic, New Jersey. She graduated from medical school in 2024 and has 2 years of diverse experience with area of expertise as Registered Dietitian Or Nutrition Professional. She is a member of the group practice St Marys General Medical Group Pc and her current practice location is 350 Boulevard, Passaic, New Jersey. You can reach out to her office (for appointments etc.) via phone at (973) 594-7800.

Abigail Nelken is licensed to practice in New Jersey (license number 86390586) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1588525158.

Contact Information

Abigail Nelken,
350 Boulevard,
Passaic, NJ 07055-2840
(973) 594-7800
Not Available

Map and Direction




Healthcare Provider's Profile

Full NameAbigail Nelken
GenderFemale
SpecialityRegistered Dietitian Or Nutrition Professional
Experience2 Years
Location350 Boulevard, Passaic, New Jersey
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Abigail Nelken graduated from medical school in 2024
  NPI Data:
  • NPI Number: 1588525158
  • Provider Enumeration Date: 11/21/2025
  • Last Update Date: 11/21/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4183105869
  • Enrollment ID: I20260220001320

Medical Identifiers

Medical identifiers for Abigail Nelken such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1588525158NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
133V00000XDietitian, Registered 86390586 (New Jersey)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
St Marys General Medical Group Pc549611247673

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Abigail Nelken allows following entities to bill medicare on her behalf.
Provider NameSt Marys General Medical Group PC
Provider TypePart B Supplier - Clinic/group Practice
Provider IdentifiersNPI Number: 1477261741
PECOS PAC ID: 5496112476
Enrollment ID: O20230607000110

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. Abigail Nelken 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
Abigail Nelken,
350 Boulevard,
Passaic, NJ 07055-2840

Ph: (973) 594-7800
Abigail Nelken,
350 Boulevard,
Passaic, NJ 07055-2840

Ph: (973) 594-7800

Reviews and Comments


Dietitian, Registered in Passaic, NJ

Alyssa Grossman, RD
Dietitian
Medicare: Not Enrolled in Medicare
Practice Location: 345 Brook Ave, Passaic, NJ 07055
Phone: 973-767-4324    
Dr. Rebecca L Heller, PHD, MS, RD
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Medicare: Not Enrolled in Medicare
Practice Location: 147 Prospect St Ste 2, Passaic, NJ 07055
Phone: 973-313-4548    
Shoshana Yaffa Glatzer, REGISTERED DIETITIAN
Dietitian
Medicare: Not Enrolled in Medicare
Practice Location: 112 Westervelt Pl # 2, Passaic, NJ 07055
Phone: 347-213-7824    
Shira Isenberg, R.D., M.P.H.
Dietitian
Medicare: Not Enrolled in Medicare
Practice Location: 14 Tennyson Pl, Apt. B, Passaic, NJ 07055
Phone: 973-470-5719    
Fiorella M Navarro Mendoza, RDN
Dietitian
Medicare: Not Enrolled in Medicare
Practice Location: 220 Passaic St, Passaic, NJ 07055
Phone: 201-210-0200    
Chanie Koplowitz, RD
Dietitian
Medicare: Not Enrolled in Medicare
Practice Location: 290 Brook Ave, Passaic, NJ 07055
Phone: 973-574-8736    
Mrs. Rita Singer, R.D.
Dietitian
Medicare: Accepting Medicare Assignments
Practice Location: 353 Terhune Ave, Passaic, NJ 07055
Phone: 862-239-6370    

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.