Mark Grosko, D.D.S.
NPI 1265614861 · Endodontics · Newark, OH
Mark Grosko, D.D.S. is a Endodontics provider in Newark, OH (NPI 1265614861).
Provider details
- NPI number
- 1265614861
- Entity type
- Individual
- Primary specialty
- EndodonticsDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 21555 (OH)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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 | 137 | 127 |
| Methylprednisolone | 65 | 60 |
| Clindamycin Hcl | 46 | 44 |
| Chlorhexidine Gluconate | 32 | 32 |
| Metronidazole | 12 | 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
- 2007-12-05
- Last updated
- 2011-09-27
Frequently asked questions
- What is Mark Grosko's NPI number?
- Mark Grosko's National Provider Identifier (NPI) is 1265614861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Grosko's specialty?
- Mark Grosko is listed in the NPPES registry with a primary specialty of Endodontics (Dental Providers).
- Where is Mark Grosko located?
- Mark Grosko's practice location on file with NPPES is 843 N 21st St, Newark, OH 43055-7273.
- What is Mark Grosko's phone number?
- The practice phone number listed in the NPPES registry for Mark Grosko is (740) 344-6349.
- Is Mark Grosko's NPI active?
- Yes — Mark Grosko's NPI (1265614861) is active in the NPPES registry as of the last update on 2011-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.