NPPES file of Aug 9, 2026

William Omar Marrero Ortiz, MD

Geriatric Medicine (Internal Medicine) Physician · San Juan, PR

William Omar Marrero Ortiz, MD is a geriatric medicine (internal medicine) physician with a practice address in San Juan, Puerto Rico, and NPI 1619418027, issued on Mar 17, 2017. Check the license (Puerto Rico 23096, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1619418027
Name
William Omar Marrero Ortiz
Credential
MD
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
23096 PR
Self-reported in NPPES; status is on the state search
Practice location
735 Ave Ponce DE Leon Ste 415, San Juan, PR 00917
Phone
(787) 768-9813
Enumerated
Mar 17, 2017
Record last updated
May 24, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 735 Ave Ponce DE Leon Ste 415

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gabriela Pabon CartagenaDermatology Physician1003330317

Verify William Omar Marrero Ortiz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
    Search for license 23096    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Puerto Rico license search

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66% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

1,457 Medicare Part D claims for 252 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 15 claims were for opioids.

  1. William Marrero Ortiz1,457
  2. Specialty average4,246

Most prescribed

  1. Clonazepam132 claims
  2. Temazepam105 claims
  3. Atorvastatin Calcium55 claims
  4. Gabapentin48 claims
  5. Famotidine46 claims
  6. Zolpidem Tartrate46 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: $1,445.00

40 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 1,004 providers of this specialty with any payment received $1,720.82 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. William Marrero Ortiz$1,445.00
  2. Specialty average$1,720.82

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Geriatric Medicine (Internal Medicine) Physician providers in Puerto Rico

There are 21 geriatric medicine (internal medicine) physician records in Puerto Rico.

All 21 in Puerto Rico → Every provider in San Juan →

Other geriatric medicine (internal medicine) physician records in Puerto Rico

  1. Isabel Alamo, M.D.Humacao, PR1841288230
  2. Daisy Baez-Franceschi, M.D.Guaynabo, PR1053379065
  3. Maritza Carrasquillo, M.D.San Juan, PR1609810258
  4. Jose Colon Rivera, MDCanovanas, PR1356904304
  5. Herminio Frontera, M.D.San Juan, PR1528126505
  6. Pedro Gil De Rubio Cruz, MDCarolina, PR1770960163
  7. Juanita Hernandez, MDLas Piedras, PR1265586200
  8. Ivonne Jimenez-Velazquez, MD, FACPCarolina, PR1407974546
  9. Faudes Lugo Morales, M.D.Cabo Rojo, PR1386180644
  10. Ruth Martinez-Camacho, MDMayaguez, PR1093985160

Common questions

What is William Omar Marrero Ortiz, MD's NPI number?

William Omar Marrero Ortiz, MD's National Provider Identifier (NPI) is 1619418027, issued on Mar 17, 2017. An NPI identifies a provider in billing; it is not a license.

Where is William Omar Marrero Ortiz, MD located?

The NPPES record lists a practice address at 735 Ave Ponce DE Leon Ste 415, San Juan, PR, 00917. Phone: (787) 768-9813. Providers update this record themselves, so call before visiting.

How can I verify William Omar Marrero Ortiz, MD's license?

NPPES lists Puerto Rico license number 23096, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.

How much does William Omar Marrero Ortiz, MD prescribe under Medicare Part D?

In 2024, William Omar Marrero Ortiz, MD had 1,457 Medicare Part D claims for 252 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.