Karla Berrios Sierra, M.D.
NPI 1558590059 · Family Medicine Physician · San Juan, PR
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karla Berrios Sierra, M.D. is a Family Medicine Physician provider in San Juan, PR (NPI 1558590059).
Provider details
- NPI number
- 1558590059
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 18935 (PR)
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 tenure33% of score
16 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 589 | 86 |
| Atorvastatin Calcium | 574 | 95 |
| Amlodipine Besylate | 476 | 76 |
| Simvastatin | 438 | 69 |
| Gabapentin | 390 | 41 |
| Hydrochlorothiazide | 369 | 57 |
| Lisinopril | 348 | 52 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$193 across 4 records (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
- 2009-07-07
- Last updated
- 2014-11-11
Frequently asked questions
- What is Karla Berrios Sierra's NPI number?
- Karla Berrios Sierra's National Provider Identifier (NPI) is 1558590059, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karla Berrios Sierra's specialty?
- Karla Berrios Sierra is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karla Berrios Sierra located?
- Karla Berrios Sierra's practice location on file with NPPES is Hospital Universitario De Adulto, San Juan, PR 00935-0001.
- What is Karla Berrios Sierra's phone number?
- The practice phone number listed in the NPPES registry for Karla Berrios Sierra is (787) 754-0101.
- Does Karla Berrios Sierra accept Medicare?
- Karla Berrios Sierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karla Berrios Sierra's NPI active?
- Yes — Karla Berrios Sierra's NPI (1558590059) is active in the NPPES registry as of the last update on 2014-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.