Carlos C. Marrero, MD
Geriatric Medicine (Family Medicine) Physician · San Juan, PR
Carlos C. Marrero, MD is a geriatric medicine (family medicine) physician with a practice address in San Juan, Puerto Rico, and NPI 1083774228, issued on Dec 11, 2006. Check the license (Puerto Rico 8381, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Carlos C. Marrero
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Family Medicine) Physician 207QG0300X
- License number
- 8381 PR
Self-reported in NPPES; status is on the state search - Practice location
- Cesar Gonzalez #463 Urb Roosevelt, San Juan, PR 00918
- Phone
- (787) 274-0277
- Enumerated
- Dec 11, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (787) 765-2823
- Medicare enrollment
- Enrolled (PECOS I20080630000698); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest geriatric medicine (family medicine) physician records → All 64 in Puerto Rico → Look up another NPI →
Verify Carlos C. Marrero 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 8381Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average geriatric medicine (family medicine) physician in 2024
560 Medicare Part D claims for 74 beneficiaries, against an average of 5,222 among the 1,271 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Gabapentin32 claims
- Methylprednisolone25 claims
- Alprazolam24 claims
- Atorvastatin Calcium24 claims
- Doxycycline Hyclate19 claims
- Rosuvastatin Calcium18 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: $136.44
3 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 460 providers of this specialty with any payment received $1,218.49 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.
Carlos C. Marrero among 64 geriatric medicine (family medicine) physician records in Puerto Rico
Carlos C. Marrero, MD is one of 64 geriatric medicine (family medicine) physician records with a practice address in Puerto Rico. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 41% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1982 · median 1998 among the 29 with a school on file
- Record last updated2007 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QG0300X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Family Medicine) Physician providers in Puerto Rico
There are 64 geriatric medicine (family medicine) physician records in Puerto Rico.
All 64 in Puerto Rico → Every provider in San Juan → Geriatric Medicine (Family Medicine) Physician nationwide →
The 8 geriatric medicine (family medicine) physician records with the nearest ZIP codes
- Marialix Alexandrino De Jesus, M.D.San Juan, PR 009181407296056
- Nashda Burgos-Muniz, MDSan Juan, PR 009181700576626
- Gilberto Ramirez Aponte, M.D.Hato Rey, PR 009181811026966
- Helen Rosa Santiago, M.D.San Juan, PR 009181013022409
- Ariel Cruz Igartua, MDSan Juan, PR 009201962462184
- Nelson De Jesus Ramos, M.D.San Juan, PR 009201912978958
- Maria Alonso, M.D.San Juan, PR 009211912921172
- Vilma Cora, MDRio Piedras, PR 009211104868439
Common questions
What is Carlos C. Marrero, MD's NPI number?
Carlos C. Marrero, MD's National Provider Identifier (NPI) is 1083774228, issued on Dec 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carlos C. Marrero, MD located?
The NPPES record lists a practice address at Cesar Gonzalez #463 Urb Roosevelt, San Juan, PR, 00918. Phone: (787) 274-0277. Providers update this record themselves, so call before visiting.
How can I verify Carlos C. Marrero, MD's license?
NPPES lists Puerto Rico license number 8381, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Carlos C. Marrero, MD prescribe under Medicare Part D?
In 2024, Carlos C. Marrero, MD had 560 Medicare Part D claims for 74 beneficiaries; the average among geriatric medicine (family medicine) physician prescribers was 5,222. 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.