Cristy Gianna Martinez-Lopez, MD
Nephrology Physician · San Juan, PR
Cristy Gianna Martinez-Lopez, MD is a nephrology physician with a practice address in San Juan, Puerto Rico, and NPI 1023262110, issued on Nov 17, 2008. Check the license (Puerto Rico 18728, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cristy Gianna Martinez-Lopez
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 18728 PR
27,235-R PR
Self-reported in NPPES; status is on the state search - Practice location
- 559 Calle Cuevillas, San Juan, PR 00907
- Phone
- (787) 643-6728
- Enumerated
- Nov 17, 2008
- Record last updated
- Mar 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150610000761); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 152 in Puerto Rico → Look up another NPI →
Verify Cristy Gianna Martinez-Lopez 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 18728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average nephrology physician in 2024
2,181 Medicare Part D claims for 181 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Farxiga245 claims
- Sevelamer Carbonate134 claims
- Losartan Potassium123 claims
- Famotidine106 claims
- Atorvastatin Calcium105 claims
- Calcium Acetate91 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: $317.86
6 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 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.
Cristy Gianna Martinez-Lopez among 152 nephrology physician records in Puerto Rico
Cristy Gianna Martinez-Lopez, MD is one of 152 nephrology physician records with a practice address in Puerto Rico. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.
- NPI issued2008 · 53% of these records are older, 41% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2003 · median 2004 among the 124 with a school on file
- Record last updated2015 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Puerto Rico
There are 152 nephrology physician records in Puerto Rico.
All 152 in Puerto Rico → Every provider in San Juan → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Antonio Diaz Hernandez, MDSan Juan, PR 009071003016775
- Maria Rivera Hernandez, MDSan Juan, PR 009071952895310
- Pedro Colton, M.D.San Juan, PR 009091104001270
- Adair Laboy Zengotita, M.D.Santurce, PR 009091952335481
- Avid Muniz, M.D.Santurce, PR 009091417919804
- Lillian Borrego Conde, MDSan Juan, PR 009171255417283
- Carlos Cortes-Sanchez, MDSan Juan, PR 009171407140064
- Nivia Cruz-Ortiz, M.D.San Juan, PR 009171447363130
Common questions
What is Cristy Gianna Martinez-Lopez, MD's NPI number?
Cristy Gianna Martinez-Lopez, MD's National Provider Identifier (NPI) is 1023262110, issued on Nov 17, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Cristy Gianna Martinez-Lopez, MD located?
The NPPES record lists a practice address at 559 Calle Cuevillas, San Juan, PR, 00907. Phone: (787) 643-6728. Providers update this record themselves, so call before visiting.
How can I verify Cristy Gianna Martinez-Lopez, MD's license?
NPPES lists Puerto Rico license number 18728, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Cristy Gianna Martinez-Lopez, MD prescribe under Medicare Part D?
In 2024, Cristy Gianna Martinez-Lopez, MD had 2,181 Medicare Part D claims for 181 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.