John Grzechowiak, APN
NPI 1477257095 · Nurse Practitioner · Clementon, NJ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Grzechowiak, APN is a Nurse Practitioner provider in Clementon, NJ (NPI 1477257095).
Provider details
- NPI number
- 1477257095
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Male
- Sole proprietor
- No
- License
- 26NJ01443700 (NJ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
202 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 136 | $82 |
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus and Influenza87428 | 32 | $69 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 21 | $100 |
| Urinalysis, Manual Test81002 | 13 | $3 |
Typical Medicare-allowed amounts for these services range $3–$100 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 57 | 56 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 33 | 33 |
| Azithromycin | 29 | 29 |
| Doxycycline Monohydrate | 21 | 21 |
| Cephalexin | 19 | 19 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 13 | 12 |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-28
- Last updated
- 2025-07-17
- Certified
- 2025-07-17
Frequently asked questions
- What is John Grzechowiak's NPI number?
- John Grzechowiak's National Provider Identifier (NPI) is 1477257095, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grzechowiak's specialty?
- John Grzechowiak is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Grzechowiak located?
- John Grzechowiak's practice location on file with NPPES is 1238 Chews Landing Rd, Clementon, NJ 08021-2808.
- What is John Grzechowiak's phone number?
- The practice phone number listed in the NPPES registry for John Grzechowiak is (856) 545-9500.
- Does John Grzechowiak accept Medicare?
- John Grzechowiak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Grzechowiak's NPI active?
- Yes — John Grzechowiak's NPI (1477257095) is active in the NPPES registry as of the last update on 2025-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.