Kassandra Sierra Martinez, M.D.
NPI 1093902462 · Family Medicine Physician · San Juan, PR
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kassandra Sierra Martinez, M.D. is a Family Medicine Physician provider in San Juan, PR (NPI 1093902462).
Provider details
- NPI number
- 1093902462
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 18104 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 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 · 22 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 54 |
| Gabapentin | 40 |
| Losartan Potassium | 35 |
| Alendronate Sodium | 31 |
| Levothyroxine Sodiumbrand: Synthroid | 29 |
| Glipizide | 27 |
| Montelukast Sodium | 26 |
| Lisinopril | 26 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$54 across 2 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
- 2007-10-01
- Last updated
- 2011-10-06
Frequently asked questions
- What is Kassandra Sierra Martinez's NPI number?
- Kassandra Sierra Martinez's National Provider Identifier (NPI) is 1093902462, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kassandra Sierra Martinez's specialty?
- Kassandra Sierra Martinez is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kassandra Sierra Martinez located?
- Kassandra Sierra Martinez's practice location on file with NPPES is 862 Ave San Patricio, San Juan, PR 00921-1308.
- What is Kassandra Sierra Martinez's phone number?
- The practice phone number listed in the NPPES registry for Kassandra Sierra Martinez is (787) 782-7060.
- Does Kassandra Sierra Martinez accept Medicare?
- Kassandra Sierra Martinez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kassandra Sierra Martinez's NPI active?
- Yes — Kassandra Sierra Martinez's NPI (1093902462) is active in the NPPES registry as of the last update on 2011-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.