Marek Niznikiewicz, DDS
NPI 1578684239 · Oral and Maxillofacial Surgery (Dentist) · Harrison, NY
Marek Niznikiewicz, DDS is a Oral and Maxillofacial Surgery (Dentist) provider in Harrison, NY (NPI 1578684239).
Provider details
- NPI number
- 1578684239
- Entity type
- Individual
- Primary specialty
- Oral and Maxillofacial Surgery (Dentist)Dental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- Yes
- License
- 049967 (NY)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 258 | 218 |
| Ibuprofen | 206 | 173 |
| Amoxicillin | 70 | 57 |
| Chlorhexidine Gluconate | 68 | 60 |
| Clindamycin Hcl | 18 | 18 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marek Niznikiewicz's NPI number?
- Marek Niznikiewicz's National Provider Identifier (NPI) is 1578684239, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marek Niznikiewicz's specialty?
- Marek Niznikiewicz is listed in the NPPES registry with a primary specialty of Oral and Maxillofacial Surgery (Dentist) (Dental Providers).
- Where is Marek Niznikiewicz located?
- Marek Niznikiewicz's practice location on file with NPPES is 351 Harrison Ave, Harrison, NY 10528-2716.
- What is Marek Niznikiewicz's phone number?
- The practice phone number listed in the NPPES registry for Marek Niznikiewicz is (516) 297-8390.
- Is Marek Niznikiewicz's NPI active?
- Yes — Marek Niznikiewicz's NPI (1578684239) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.