Sam Ontiveros, M.D.
NPI 1538522396 · Emergency Medicine Physician · Charleston, SC
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sam Ontiveros, M.D. is a Emergency Medicine Physician provider in Charleston, SC (NPI 1538522396).
Provider details
- NPI number
- 1538522396
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A162448 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 44 | 44 |
| Rivaroxabanbrand: Xarelto | 24 | 11 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 23 | 23 |
| Cefpodoxime Proxetil | 22 | 22 |
| Cefadroxil | 21 | 21 |
| Ibuprofen | 18 | 18 |
| Cephalexin | 17 | 17 |
Practice location
Mailing address
Additional practice locations (2)
- 200 W Arbor DrSan Diego, CA 92103-9000Phone: (800) 926-8273
- 55 Lake Ave NWorcester, MA 01655-0002Phone: (508) 334-1000
Registry dates
- Enumerated
- 2016-03-30
- Last updated
- 2023-10-27
- Certified
- 2022-03-14
Frequently asked questions
- What is Sam Ontiveros's NPI number?
- Sam Ontiveros's National Provider Identifier (NPI) is 1538522396, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sam Ontiveros's specialty?
- Sam Ontiveros is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sam Ontiveros located?
- Sam Ontiveros's practice location on file with NPPES is 171 Ashley Ave, Charleston, SC 29425-8908.
- What is Sam Ontiveros's phone number?
- The practice phone number listed in the NPPES registry for Sam Ontiveros is (843) 792-1414.
- Does Sam Ontiveros accept Medicare?
- Sam Ontiveros is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sam Ontiveros's NPI active?
- Yes — Sam Ontiveros's NPI (1538522396) is active in the NPPES registry as of the last update on 2023-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.