PAOLA CHRISTINA MERCADO MILLAN MD
NPI 1689121634
Internal Medicine - Cardiovascular Disease in Santurce, PR
About Paola Christina Mercado Millan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PAOLA CHRISTINA MERCADO MILLAN MD (NPI 1689121634) is an individual cardiovascular disease provider in Santurce, Puerto Rico, licensed in Puerto Rico (22258) and active in the NPI registry since September 2016. She is enrolled in Medicare PECOS, is affiliated with Doctor's Center De San Juan, and maintains a secondary practice location in San Juan.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Paola Christina Mercado Millan 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 Reassignments
2Medicare enrollment records show Paola Mercado Millan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Guaynabo, PR 00969
- Reassigned Medicare billing, Puerto Rico enrollment
- 13 clinicians in this Medicare group
Bayamon, PR 00961
- Reassigned Medicare billing, Puerto Rico enrollment
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Doctor's Center De San Juan
Acute Care Hospitals · San Juan, PRDoctors Center Hospital Carolina LLC
Acute Care Hospitals · Carolina, PRPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 00909 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Paola Mercado Millan's NPI number?
The NPI number for Paola Mercado Millan is 1689121634. It was assigned to this individual provider in the NPPES registry on September 7, 2016.
Where is Paola Mercado Millan located?
Paola Mercado Millan practices at 1395 Calle San Rafael # 20, Santurce, PR 00909. The listed phone number is (787) 999-7620.
What is Paola Mercado Millan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Paola Mercado Millan enrolled in Medicare?
Yes. Paola Mercado Millan 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 organizations bill Medicare for Paola Mercado Millan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Paola Mercado Millan reassigns Medicare benefits to 2 organizations: Ccs Psc (Guaynabo, PR) and Pc2m LLC (Bayamon, PR). Each 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 Paola Mercado Millan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Paola Mercado Millan affiliated with any hospitals?
According to CMS data, Paola Mercado Millan is affiliated with Doctor's Center De San Juan and Doctors Center Hospital Carolina LLC.
When was this NPI record last updated?
The NPPES record for Paola Mercado Millan was last updated on July 16, 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.
# Paola Christina Mercado Millan, MD · NPI 1689121634
Cardiovascular Disease physician in Santurce, Puerto Rico. Individual provider, active in the CMS NPPES registry since September 7, 2016.
## Identity
- **NPI:** 1689121634 (Entity type: Individual)
- **Enumerated:** September 7, 2016
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 22258 (Puerto Rico)
- **Sole proprietor:** No
## Practice location
- **Address:** 1395 CALLE SAN RAFAEL # 20, Santurce, PR 00909-2518
- **Phone:** (787) 999-7620
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Ccs Psc (NPI 1174907760, Guaynabo, PR); Pc2m LLC (NPI 1255221594, Bayamon, PR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Puerto Rico School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** July 16, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1689121634) · Data from the CMS NPPES public registry.