John Kolnik, D.O.
NPI 1902894496 · Gastroenterology Physician · Haddon Heights, NJ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kolnik, D.O. is a Gastroenterology Physician provider in Haddon Heights, NJ (NPI 1902894496).
Provider details
- NPI number
- 1902894496
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MB06094100 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
987 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 233 | $101 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 163 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 155 | $141 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 105 | $107 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 79 | $184 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 476 | 164 |
| Pantoprazole Sodium | 234 | 83 |
| Famotidine | 190 | 63 |
| Esomeprazole Magnesium | 113 | 32 |
| Dicyclomine Hcl | 95 | 39 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 72 | 26 |
| Amitriptyline Hcl | 68 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$654 across 47 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1000 Atlantic Ave Ste 205bCamden, NJ 08104-1132Phone: (856) 237-8045Fax: (856) 751-2333
Registry dates
- Enumerated
- 2005-10-10
- Last updated
- 2026-02-23
- Certified
- 2026-02-23
Frequently asked questions
- What is John Kolnik's NPI number?
- John Kolnik's National Provider Identifier (NPI) is 1902894496, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kolnik's specialty?
- John Kolnik is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Kolnik located?
- John Kolnik's practice location on file with NPPES is 217 White Horse Pike, Haddon Heights, NJ 08035-1703.
- What is John Kolnik's phone number?
- The practice phone number listed in the NPPES registry for John Kolnik is (856) 547-1661.
- Does John Kolnik accept Medicare?
- John Kolnik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kolnik's NPI active?
- Yes — John Kolnik's NPI (1902894496) is active in the NPPES registry as of the last update on 2026-02-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.