Greisha Marie Gonzalez Santiago, MD
Critical Care Medicine (Internal Medicine) Physician · Ponce, PR
Greisha Marie Gonzalez Santiago, MD is a critical care medicine (internal medicine) physician with a practice address in Ponce, Puerto Rico, and NPI 1275047052, issued on Dec 1, 2017. Check the license (Puerto Rico 22239, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Greisha Marie Gonzalez Santiago
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 22239 PR
Self-reported in NPPES; status is on the state search - Practice location
- 305 Calle Beato Francisco Palau, Ponce, PR 00728
- Phone
- (787) 421-2747
- Enumerated
- Dec 1, 2017
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20221027000051); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 20 in Puerto Rico → Look up another NPI →
Verify Greisha Marie Gonzalez Santiago in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
Search for license 22239Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
140 Medicare Part D claims for 42 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Albuterol Sulfate Hfa26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,810.09
54 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,708 providers of this specialty with any payment received $2,958.68 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital affiliations
- Hospital Menonita Caguas IncCaguas, PR · Acute Care Hospitals
- Hospital Menonita DE CayeyCayey, PR · Acute Care Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Greisha Marie Gonzalez Santiago among 20 critical care medicine (internal medicine) physician records in Puerto Rico
Greisha Marie Gonzalez Santiago, MD is one of 20 critical care medicine (internal medicine) physician records with a practice address in Puerto Rico. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 75% of them.
- NPI issued2017 · 75% of these records are older, 15% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2016 · median 2003 among the 14 with a school on file
- Record last updated2026 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Puerto Rico
There are 20 critical care medicine (internal medicine) physician records in Puerto Rico.
All 20 in Puerto Rico → Every provider in Ponce → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Claudia Cordoba Carrillo, MDCaguas, PR 007271639320856
- Enrique Rodriguez, MDCaguas, PR 007271952831463
- Aixa Dones RodriguezCaguas, PR 007251457795072
- Biomaris Medina-Rivera, MDCayey, PR 007371043406614
- Marta Ivette Rios Benitez, MDPonce, PR 007171053401570
- Gerald Marin GarciaPonce, PR 007161265833024
- Adriana Arcila, M.D., MBAManati, PR 006741528269842
- Ramon Paoli-Bruno, M.D.Humacao, PR 007911801894746
Common questions
What is Greisha Marie Gonzalez Santiago, MD's NPI number?
Greisha Marie Gonzalez Santiago, MD's National Provider Identifier (NPI) is 1275047052, issued on Dec 1, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Greisha Marie Gonzalez Santiago, MD located?
The NPPES record lists a practice address at 305 Calle Beato Francisco Palau, Ponce, PR, 00728. Phone: (787) 421-2747. Providers update this record themselves, so call before visiting.
How can I verify Greisha Marie Gonzalez Santiago, MD's license?
NPPES lists Puerto Rico license number 22239, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Greisha Marie Gonzalez Santiago, MD prescribe under Medicare Part D?
In 2024, Greisha Marie Gonzalez Santiago, MD had 140 Medicare Part D claims for 42 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.