Ronald Markarian, D.M.D., M.S., P.C.
NPI 1013920289 · Endodontics · Swansea, IL
Enrolled with Medicare as Order and Referring Only - Oral Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Markarian, D.M.D., M.S., P.C. is a Endodontics provider in Swansea, IL (NPI 1013920289).
Provider details
- NPI number
- 1013920289
- Entity type
- Individual
- Primary specialty
- EndodonticsDental Providers
- Credential
- D.M.D., M.S., P.C.
- Sex
- Male
- Sole proprietor
- No
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
83% 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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Penicillin V Potassium | 99 | 87 |
| Clindamycin Hcl | 28 | 24 |
| Amoxicillin | 16 | 14 |
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
- 2006-08-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Ronald Markarian's NPI number?
- Ronald Markarian's National Provider Identifier (NPI) is 1013920289, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Markarian's specialty?
- Ronald Markarian is listed in the NPPES registry with a primary specialty of Endodontics (Dental Providers).
- Where is Ronald Markarian located?
- Ronald Markarian's practice location on file with NPPES is 16 Park Place Professional Centre, Swansea, IL 62226-2969.
- What is Ronald Markarian's phone number?
- The practice phone number listed in the NPPES registry for Ronald Markarian is (618) 234-5533.
- Does Ronald Markarian accept Medicare?
- Ronald Markarian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Markarian's NPI active?
- Yes — Ronald Markarian's NPI (1013920289) 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.