Sien Rivera, MD
NPI 1336660497 · Child & Adolescent Psychiatry Physician · Columbia, SC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sien Rivera, MD is a Child & Adolescent Psychiatry Physician provider in Columbia, SC (NPI 1336660497).
Provider details
- NPI number
- 1336660497
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- LL41040 (SC)
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 tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
44 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 24 | $127 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 20 | $49 |
Typical Medicare-allowed amounts for these services range $49–$127 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 50 | 12 |
| Duloxetine Hcl | 43 | — |
| Mirtazapine | 27 | — |
| Buspirone Hcl | 17 | — |
| Sertraline Hcl | 17 | — |
| Escitalopram Oxalate | 17 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-29
- Last updated
- 2022-07-27
- Certified
- 2022-07-27
Frequently asked questions
- What is Sien Rivera's NPI number?
- Sien Rivera's National Provider Identifier (NPI) is 1336660497, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sien Rivera's specialty?
- Sien Rivera is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Sien Rivera located?
- Sien Rivera's practice location on file with NPPES is 3555 Harden Street Ext Ste 141, Columbia, SC 29203-6894.
- What is Sien Rivera's phone number?
- The practice phone number listed in the NPPES registry for Sien Rivera is (803) 434-4300.
- Does Sien Rivera accept Medicare?
- Sien Rivera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sien Rivera's NPI active?
- Yes — Sien Rivera's NPI (1336660497) is active in the NPPES registry as of the last update on 2022-07-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.