DR. KENNETH ZIERER M.D.
NPI 1417978883
Internal Medicine - Gastroenterology in Rutherford, NJ

Q: What is Kenneth Zierer's NPI number?

The NPI number for Kenneth Zierer is 1417978883. It was assigned to this individual provider in the NPPES registry on July 21, 2006.

Q: What is Kenneth Zierer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Kenneth Zierer was last updated on August 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 21, 2006PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

71 UNION AVE STE 201, RUTHERFORD, NJ 07070(201) 842-0020(201) 842-0010 Get Directions Write a Review

NPPES record last updated: August 9, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 9, 2023, Apr 27, 2018 (2 updates tracked since 2018).

On this page

About Dr. Kenneth Zierer M.d. NPPES

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

DR. KENNETH ZIERER M.D. (NPI 1417978883) is an individual gastroenterology provider in Rutherford, New Jersey, licensed in New Jersey (25MA5838900) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with St Mary's General Hospital, and maintains a secondary practice location in Clifton.

NPPES Registry Identity

NPI1417978883

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. KENNETH ZIERERCredential: M.D.

Location Address71 UNION AVE STE 201Rutherford, NJ 07070-1272

Mailing Address1130 Mcbride Ave Fl 3Woodland Park, NJ 07424-3806 · (973) 812-1400 · Fax (973) 812-1404

Phone(201) 842-0020

Fax(201) 842-0010

Sole ProprietorNo

Medical School CMSRutgers New Jersey Medical SchoolGraduated 1988

Enumeration DateJuly 21, 2006

Last NPPES UpdateAugust 9, 20232 updates tracked since enumeration

NPPES CertifiedAugust 9, 2023

✔ NPI 1417978883 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in NJ · 25MA5838900

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

71 UNION AVE STE 201, Rutherford, NJ 07070

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Secondary Practice Location 1

Location 1925 Clifton AveClifton, NJ 07013-2724 · Phone (973) 458-0408 · Fax (973) 405-6564

Other Identifiers 1

Medicaid6956602NJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Kenneth Zierer M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476576646

PECOS Enrollment IDI20060113000415

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Kenneth Zierer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bhmg - United Medical

1.1 mi

Internal Medicine

612 RUTHERFORD AVE
Lyndhurst, NJ 07071

Reassigned Medicare billing, New Jersey enrollment
46 clinicians in this Medicare group

NPI 1639594377 (201) 460-0063

Gastroenterology Associates Of New Jersey, LLC

7.1 mi

Gastroenterology

1130 MCBRIDE AVE
Woodland Park, NJ 07424

Reassigned Medicare billing, New Jersey enrollment
117 clinicians in this Medicare group

NPI 1497932271 (973) 812-1400

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 13

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

148 services117 patients

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

135 services13 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

88 services57 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

82 services13 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

47 services47 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

39 services37 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

37 services36 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

24 services24 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

23 services23 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

22 services14 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

12 services12 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

11 services11 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Mary's General Hospital

Acute Care Hospitals · Passaic, NJ

3/5 CMS rating

OwnershipProprietary

CMS Certification Number310006

Location350 BoulevardPassaic, NJ 07055 · Passaic County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07070 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$144.86 typical visit price

range $63.84 – $190.92

Typical copayment $36.21 (range $15.96 – $47.73)

Most-billed visit code 99204

Established Patient

$111.57 typical visit price

range $20.97 – $155.92

Typical copayment $27.89 (range $5.24 – $38.98)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Promoting Interoperability

Improvement Activities

Reported Quality Measures

e-Prescribing

99%706 patients4/55-star benchmark: 100%

Provide Patients Electronic Access to Their Health Information

90%457 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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 Kenneth Zierer's NPI number?

The NPI number for Kenneth Zierer is 1417978883. It was assigned to this individual provider in the NPPES registry on July 21, 2006.

Where is Kenneth Zierer located?

Kenneth Zierer practices at 71 Union Ave Ste 201, Rutherford, NJ 07070. The listed phone number is (201) 842-0020.

What is Kenneth Zierer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Kenneth Zierer enrolled in Medicare?

Yes. Kenneth Zierer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Kenneth Zierer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kenneth Zierer reassigns Medicare benefits to 2 organizations: Bhmg - United Medical (Lyndhurst, NJ) and Gastroenterology Associates Of New Jersey, LLC (Woodland Park, NJ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kenneth Zierer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kenneth Zierer accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Kenneth Zierer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Kenneth Zierer affiliated with any hospitals?

According to CMS data, Kenneth Zierer is affiliated with St Mary's General Hospital.

When was this NPI record last updated?

The NPPES record for Kenneth Zierer was last updated on August 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.