Carmen Sierra, MD
NPI 1972539054 · Obstetrics Physician · Hato Rey, PR
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carmen Sierra, MD is a Obstetrics Physician provider in Hato Rey, PR (NPI 1972539054).
Provider details
- NPI number
- 1972539054
- Entity type
- Individual
- Primary specialty
- Obstetrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 10976 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
44 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 44 | $89 |
Typical Medicare-allowed amounts for these services range $89–$89 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluconazole | 42 | 40 |
| Clotrimazole/Betamethasone Dipbrand: Clotrimazole-Betamethasone | 33 | 30 |
| Spironolactone | 27 | — |
| Progesterone, Micronizedbrand: Progesterone | 17 | — |
| Valacyclovir Hclbrand: Valacyclovir | 13 | — |
| Acyclovir | 12 | — |
| Ciprofloxacin Hcl | 12 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-23
- Last updated
- 2009-02-25
Frequently asked questions
- What is Carmen Sierra's NPI number?
- Carmen Sierra's National Provider Identifier (NPI) is 1972539054, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carmen Sierra's specialty?
- Carmen Sierra is listed in the NPPES registry with a primary specialty of Obstetrics Physician (Allopathic & Osteopathic Physicians).
- Where is Carmen Sierra located?
- Carmen Sierra's practice location on file with NPPES is Avenida Domenech 400, Hato Rey, PR 00919-2078.
- What is Carmen Sierra's phone number?
- The practice phone number listed in the NPPES registry for Carmen Sierra is (787) 281-8522.
- Does Carmen Sierra accept Medicare?
- Carmen Sierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carmen Sierra's NPI active?
- Yes — Carmen Sierra's NPI (1972539054) is active in the NPPES registry as of the last update on 2009-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.