Nick Mastromihalis, DDS
NPI 1083838254 · Endodontics · Mount Kisco, NY
Nick Mastromihalis, DDS is a Endodontics provider in Mount Kisco, NY (NPI 1083838254).
Provider details
- NPI number
- 1083838254
- Entity type
- Individual
- Primary specialty
- EndodonticsDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- No
- License
- 0466871 (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 |
|---|---|---|
| Amoxicillin | 145 | 128 |
| Azithromycin | 55 | 41 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 45 | 40 |
| Clindamycin Hcl | 19 | 15 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 11 | — |
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
- 2007-04-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nick Mastromihalis's NPI number?
- Nick Mastromihalis's National Provider Identifier (NPI) is 1083838254, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nick Mastromihalis's specialty?
- Nick Mastromihalis is listed in the NPPES registry with a primary specialty of Endodontics (Dental Providers).
- Where is Nick Mastromihalis located?
- Nick Mastromihalis's practice location on file with NPPES is 101 S Bedford Rd, Mount Kisco, NY 10549-3439.
- What is Nick Mastromihalis's phone number?
- The practice phone number listed in the NPPES registry for Nick Mastromihalis is (914) 241-1177.
- Is Nick Mastromihalis's NPI active?
- Yes — Nick Mastromihalis's NPI (1083838254) 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.