DR. WILLIAM OMAR MARRERO ORTIZ MD
NPI 1619418027
Internal Medicine - Geriatric Medicine in San Juan, PR
About Dr. William Omar Marrero Ortiz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM OMAR MARRERO ORTIZ MD (NPI 1619418027) is an individual geriatric medicine provider in San Juan, Puerto Rico, licensed in Puerto Rico (23096) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Auxilio Mutuo Hospital, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. William Omar Marrero Ortiz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show William Marrero Ortiz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Juan, PR 00917
- Reassigned Medicare billing, Puerto Rico enrollment
- 2 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Auxilio Mutuo Hospital
Acute Care Hospitals · San Juan, PRPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 00917 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Marrero Ortiz's NPI number?
The NPI number for William Marrero Ortiz is 1619418027. It was assigned to this individual provider in the NPPES registry on March 17, 2017.
Where is William Marrero Ortiz located?
William Marrero Ortiz practices at 735 Ave Ponce De Leon Ste 415, San Juan, PR 00917. The listed phone number is (787) 768-9813.
What is William Marrero Ortiz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is William Marrero Ortiz enrolled in Medicare?
Yes. William Marrero Ortiz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for William Marrero Ortiz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Marrero Ortiz reassigns Medicare benefits to Jp Internal & Cardiovascular Medicine Psc (San Juan, PR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Marrero Ortiz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is William Marrero Ortiz affiliated with any hospitals?
According to CMS data, William Marrero Ortiz is affiliated with Auxilio Mutuo Hospital.
When was this NPI record last updated?
The NPPES record for William Marrero Ortiz was last updated on May 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. William Omar Marrero Ortiz, MD · NPI 1619418027
Geriatric Medicine physician in San Juan, Puerto Rico. Individual provider, active in the CMS NPPES registry since March 17, 2017.
## Identity
- **NPI:** 1619418027 (Entity type: Individual)
- **Enumerated:** March 17, 2017
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** 23096 (Puerto Rico)
- **Sole proprietor:** No
## Practice location
- **Address:** 735 AVE PONCE DE LEON STE 415, San Juan, PR 00917-5026
- **Phone:** (787) 768-9813
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Jp Internal & Cardiovascular Medicine Psc (NPI 1134470404, San Juan, PR), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** May 24, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1619418027) · Data from the CMS NPPES public registry.