Dr. Kenneth G. Zierer, MD
- Medicare services, 2024
- 679
- Medicare patients, 2024
- 265
- Part D claims, 2024
- 1,223
- MIPS score, 2024
- 81
- Hospital affiliations
- 1
- Practice address
- 925 Clifton Ave, Clifton, NJ 07013
- Practice phone
- Call (973) 458-0408
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Affiliated Endoscopy Services of Clifton
Clifton, New Jersey
Find Dr. Zierer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Kenneth G. Zierer is a gastroenterologist in Clifton, New Jersey
Dr. Zierer practices at Affiliated Endoscopy Services of Clifton in Clifton, New Jersey.
Dr. Zierer's NPI, 1417978883, was assigned on July 21, 2006. Dr. Zierer graduated from Rutgers New Jersey Medical School in 1988. Dr. Zierer holds New Jersey license 25MA5838900.
- NPI
- 1417978883NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476576646
- NPI enumeration date
- July 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (973) 458-0408
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kenneth G. Zierer practices at Affiliated Endoscopy Services of Clifton in Clifton, New Jersey
Dr. Zierer's primary practice is Affiliated Endoscopy Services of Clifton, at 925 Clifton Ave, Clifton, NJ 07013 in Passaic County. The practice phone is (973) 458-0408.
- Affiliated Endoscopy Services of Clifton925 Clifton Ave, Clifton, NJ 07013 · Passaic CountyPhone(973) 458-0408
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kenneth G. Zierer is affiliated with 4 sites of care and 3 medical groups
Dr. Zierer's primary practice is Affiliated Endoscopy Services of Clifton in Clifton, New Jersey. Dr. Zierer is also affiliated with St. Mary's General Hospital. The medical group on file is GANJ - Gastroenterology Associates of New Jersey. Dmand AI also links Dr. Zierer to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kenneth G. Zierer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zierer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Affiliated Endoscopy Services of Clifton | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kenneth G. Zierer is one of 691 gastroenterologists in New Jersey
Gastroenterology is Dr. Zierer's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Zierer is licensed in New Jersey.
Specialties and state licenses
- Gastroenterology, New JerseyPrimary
Gastroenterologists near Dr. Zierer
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Kenneth G. Zierer billed Medicare for 679 services in 2024
CMS data shows 679 Medicare services from Dr. Zierer across 13 procedure codes in 2024, for 265 Medicare patients. Medicare paid $59,449 for them.
Dr. Zierer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8152024: 57230%
- Surgery
- 2023: 1202024: 8430%
- Imaging
- 2023: 02024: 12
- Other services
- 2023: 02024: 11
- Tests and treatments
- 2023: 162024: 0100%
Where Dr. Zierer's Medicare services took place, 2024
- In an office52377%
- In a facility15623%
Dr. Zierer compared with the New Jersey median for gastroenterologists, 2024
- Dr. Zierer
- New Jersey median
- Medicare services
- 679vs 685Close to median
- Medicare patients
- 265vs 37529% below
- Part D claims
- 1,026vs 61168% above
Medians across 674 gastroenterologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Zierer's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zierer and other gastroenterologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kenneth G. Zierer treated 265 Medicare patients in 2024, average age 72
CMS counts 265 Medicare patients who saw Dr. Zierer in 2024. The largest group is 65 to 74, with 146 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.62, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zierer's median patient age at 60, with 49% women.
Dr. Zierer's Medicare patients by age, 2024
Dr. Zierer's Medicare patients by sex, 2024
- Women15860%
- Men10740%
Chronic conditions among Dr. Zierer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes40%
- Ischemic heart disease34%
- Anxiety33%
- Mood disorders29%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zierer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women49%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kenneth G. Zierer wrote 1,223 Medicare Part D claims in 2024
In 2024, Dr. Zierer wrote 1,223 Medicare Part D claims for 305 patients. 94% of them were for generic drugs. CMS names the drug for 1,026 of them, across 18 drugs with 11 or more claims each, at $28,407 in total drug cost. In 2023, CMS named 1,012 claims across 21 drugs.
Dr. Zierer's Part D claims by kind of drug, 2024
- Generic1,146 claims94%
- Brand-name77 claims6%
Dr. Zierer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Zierer's Part D claims, 2024
- Antibiotics2%20 of 1,223 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0122024: 1,0261%
Drugs named by CMS: 18 in 2024, 21 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Kenneth G. Zierer scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Zierer for performance year 2024, reported individually. Dr. Zierer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 64 procedures of colonoscopy by Dr. Zierer, more than 69% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Zierer's MIPS scores, performance year 2024
- 81of 100Final score
- 60.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Zierer ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 68th percentile66 procedures
- Colonoscopy
- 69th percentile64 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Kenneth G. Zierer received $13,025 in industry payments from 2016 to 2025
CMS Open Payments shows 800 general payments to Dr. Zierer from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $2,383.
General payments to Dr. Zierer by program year, 2016 to 2025
General payments to Dr. Zierer by kind, 2016 to 2025
- Food and beverage$12,983100%
- Education$270%
- Consulting fees$140%
Companies that paid Dr. Zierer the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kenneth G. Zierer graduated from Rutgers New Jersey Medical School
Dr. Zierer graduated from Rutgers New Jersey Medical School in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kenneth G. Zierer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Kenneth G. Zierer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Kenneth G. Zierer's NPI number?
Dr. Kenneth G. Zierer's NPI number is 1417978883. It was assigned on July 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kenneth G. Zierer?
Dr. Kenneth G. Zierer is a gastroenterologist in Clifton, New Jersey. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Kenneth G. Zierer practice?
Dr. Zierer practices at 925 Clifton Ave, Clifton, NJ 07013. Dr. Zierer's primary practice is Affiliated Endoscopy Services of Clifton in Clifton, New Jersey. Dmand AI also links Dr. Zierer to 2 group practices and clinics and 2 medical groups.
What is Dr. Kenneth G. Zierer's office phone number?
The practice phone on file for Dr. Zierer is (973) 458-0408.
What is Dr. Kenneth G. Zierer's medical license number?
Dr. Zierer holds New Jersey license 25MA5838900.
Which hospitals is Dr. Kenneth G. Zierer affiliated with?
Dr. Zierer is affiliated with St. Mary's General Hospital.
What medical group is Dr. Kenneth G. Zierer part of?
Dr. Zierer is linked to GANJ - Gastroenterology Associates of New Jersey. Dmand AI links Dr. Zierer to 2 more medical groups.
Does Dr. Kenneth G. Zierer accept Medicare?
Yes. CMS data shows Dr. Zierer billed Medicare for 679 services in 2024, and Dr. Zierer accepts Medicare assignment.
What is Dr. Kenneth G. Zierer's MIPS score?
Dr. Zierer's MIPS final score for performance year 2024 is 81 out of 100, reported individually.
How many Medicare patients does Dr. Kenneth G. Zierer see?
CMS counts 265 Medicare patients who saw Dr. Zierer in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Kenneth G. Zierer bill to Medicare?
In 2024, Dr. Zierer's most billed Medicare services were office visit, established patient (99213), care management and other visits (99439) and office visit, established patient (99214).
Where did Dr. Kenneth G. Zierer go to medical school?
Dr. Zierer graduated from Rutgers New Jersey Medical School in 1988.
What drugs does Dr. Kenneth G. Zierer prescribe most?
In 2024 Medicare Part D data, Dr. Zierer's most prescribed drugs by claims were Pantoprazole Sodium, Ursodiol and Omeprazole.
Has Dr. Kenneth G. Zierer received payments from drug or device companies?
CMS Open Payments shows $13,025 in general payments to Dr. Zierer from 42 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Kenneth G. Zierer been practicing?
Dr. Zierer graduated from medical school in 1988, 38 years ago.
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