GRISSELLE M ROBAINA SANTIAGO MD
NPI 1821719857
General Practice in Carolina, PR
About Grisselle M Robaina Santiago Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRISSELLE M ROBAINA SANTIAGO MD (NPI 1821719857) is an individual general practice provider in Carolina, Puerto Rico, licensed in Puerto Rico (22874) and active in the NPI registry since September 2022. She is enrolled in Medicare PECOS, is affiliated with Hospital Perea, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
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
Grisselle M Robaina Santiago 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 Grisselle Robaina Santiago reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Arecibo, PR 00612
- Reassigned Medicare billing, Puerto Rico enrollment
- 19 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.
Hospital Perea
Acute Care Hospitals · Mayaguez, PRFrequently 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 Grisselle Robaina Santiago's NPI number?
The NPI number for Grisselle Robaina Santiago is 1821719857. It was assigned to this individual provider in the NPPES registry on September 8, 2022.
Where is Grisselle Robaina Santiago located?
Grisselle Robaina Santiago practices at O37 Calle 3, Carolina, PR 00983. The listed phone number is (939) 281-9016.
What is Grisselle Robaina Santiago's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is Grisselle Robaina Santiago enrolled in Medicare?
Yes. Grisselle Robaina Santiago 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 Grisselle Robaina Santiago's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grisselle Robaina Santiago reassigns Medicare benefits to Physician Healthcare Administration LLC (Arecibo, 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 Grisselle Robaina Santiago's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Grisselle Robaina Santiago affiliated with any hospitals?
According to CMS data, Grisselle Robaina Santiago is affiliated with Hospital Perea.
When was this NPI record last updated?
The NPPES record for Grisselle Robaina Santiago was last updated on February 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.
# Grisselle M Robaina Santiago, MD · NPI 1821719857
General Practice physician in Carolina, Puerto Rico. Individual provider, active in the CMS NPPES registry since September 8, 2022.
## Identity
- **NPI:** 1821719857 (Entity type: Individual)
- **Enumerated:** September 8, 2022
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **State license:** 22874 (Puerto Rico)
- **Sole proprietor:** Yes
## Practice location
- **Address:** O37 CALLE 3, Carolina, PR 00983-1518
- **Phone:** (939) 281-9016
## 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:** Physician Healthcare Administration LLC (NPI 1457730871, Arecibo, PR), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** February 20, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1821719857) · Data from the CMS NPPES public registry.