Marcos Santiago Hernandez, MD
NPI 1619080389 · Specialist · San Juan, PR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcos Santiago Hernandez, MD is a Specialist provider in San Juan, PR (NPI 1619080389).
Provider details
- NPI number
- 1619080389
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 80006 (PR)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
221 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 196 | $90 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 13 | $60 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 12 | $110 |
Typical Medicare-allowed amounts for these services range $60–$110 (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 · 111 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 358 | 136 |
| Metoprolol Succinate | 320 | 111 |
| Levothyroxine Sodiumbrand: Synthroid | 293 | 88 |
| Simvastatin | 293 | 98 |
| Rosuvastatin Calcium | 290 | 105 |
| Ezetimibe | 271 | 102 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marcos Santiago Hernandez's NPI number?
- Marcos Santiago Hernandez's National Provider Identifier (NPI) is 1619080389, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcos Santiago Hernandez's specialty?
- Marcos Santiago Hernandez is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Marcos Santiago Hernandez located?
- Marcos Santiago Hernandez's practice location on file with NPPES is Ashford Medical Center / Condado, San Juan, PR 00910-0069.
- What is Marcos Santiago Hernandez's phone number?
- The practice phone number listed in the NPPES registry for Marcos Santiago Hernandez is (787) 724-3507.
- Does Marcos Santiago Hernandez accept Medicare?
- Marcos Santiago Hernandez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcos Santiago Hernandez's NPI active?
- Yes — Marcos Santiago Hernandez's NPI (1619080389) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.