SAM T. ONTIVEROS M.D.
NPI 1538522396
Emergency Medicine in Charleston, SC
About Sam T. Ontiveros M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SAM T. ONTIVEROS M.D. (NPI 1538522396) is an individual emergency medicine provider in Charleston, South Carolina, licensed in South Carolina (85834) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Sam T. Ontiveros M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
8Medicare enrollment records show Sam Ontiveros reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Charleston, SC 29425
- Reassigned Medicare billing, South Carolina enrollment
- 2,594 clinicians in this Medicare group
Hartsville, SC 29550
- Reassigned Medicare billing, South Carolina enrollment
- 160 clinicians in this Medicare group
Derry, NH 03038
- Reassigned Medicare billing, New Hampshire enrollment
- 145 clinicians in this Medicare group
San Diego, CA 92127
- Reassigned Medicare billing, California enrollment
- 271 clinicians in this Medicare group
San Diego, CA 92120
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
National City, CA 91950
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Regents Of The University Of California
- 221 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 526 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29425 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHARLESTON, SC 29425
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Sam Ontiveros's NPI number?
The NPI number for Sam Ontiveros is 1538522396. It was assigned to this individual provider in the NPPES registry on March 30, 2016.
Where is Sam Ontiveros located?
Sam Ontiveros practices at 171 Ashley Ave, Charleston, SC 29425. The listed phone number is (843) 792-1414.
What is Sam Ontiveros's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Sam Ontiveros enrolled in Medicare?
Yes. Sam Ontiveros is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Sam Ontiveros's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sam Ontiveros reassigns Medicare benefits to 8 organizations: University Medical Associates Of The Medical University Of South Carol (Charleston, SC), App Of South Carolina Ed PLLC (Hartsville, SC), Emergency Medicine Services Of Nh, LLC (Derry, NH), Uc San Diego Health Community Group (San Diego, CA), Southern California Permanente Medical Group (San Diego, CA) and 3 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sam Ontiveros's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sam Ontiveros accept?
Health plans from First Choice Next list Sam Ontiveros as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Sam Ontiveros was last updated on October 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Sam T. Ontiveros, M.D. · NPI 1538522396
Emergency Medicine physician in Charleston, South Carolina. Individual provider, active in the CMS NPPES registry since March 30, 2016.
## Identity
- **NPI:** 1538522396 (Entity type: Individual)
- **Enumerated:** March 30, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 85834 (South Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 171 ASHLEY AVE, Charleston, SC 29425-8908
- **Phone:** (843) 792-1414
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): University Medical Associates Of The Medical University Of South Carol (NPI 1013934629, Charleston, SC); App Of South Carolina Ed PLLC (NPI 1457878084, Hartsville, SC); Emergency Medicine Services Of Nh, LLC (NPI 1386341444, Derry, NH); Uc San Diego Health Community Group (NPI 1659864247, San Diego, CA); Southern California Permanente Medical Group (NPI 1225060742, San Diego, CA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1538522396) · Data from the CMS NPPES public registry.