Dannel Diaz Ruiz, MD
Endocrinology, Diabetes & Metabolism Physician · Mayaguez, PR
Dannel Diaz Ruiz, MD is an endocrinology, diabetes & metabolism physician with a practice address in Mayaguez, Puerto Rico, and NPI 1679066435, issued on Jun 7, 2018. Check the license (Puerto Rico 23235, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Dannel Diaz Ruiz
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 23235 PR
14699-I PR
35253-R PR
Self-reported in NPPES; status is on the state search - Practice location
- 313 Calle Pirineo, Mayaguez, PR 00680
- Phone
- (787) 477-8410
- Enumerated
- Jun 7, 2018
- Record last updated
- Feb 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20250630004232); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 144 in Puerto Rico → Look up another NPI →
Verify Dannel Diaz Ruiz 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 23235Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,694 Medicare Part D claims for 419 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 59% of claims.
Most prescribed
- Ozempic145 claims
- Lantus Solostar115 claims
- Jardiance111 claims
- Metformin Hcl Er85 claims
- Synthroid82 claims
- Trulicity79 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: $336.18
15 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Dannel Diaz Ruiz among 144 endocrinology, diabetes & metabolism physician records in Puerto Rico
Dannel Diaz Ruiz, MD is one of 144 endocrinology, diabetes & metabolism physician records with a practice address in Puerto Rico. 97% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 87% of them.
- NPI issued2018 · 87% of these records are older, 6% newer
- In a Medicare fileYes · 97% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2018 · median 2007 among the 119 with a school on file
- Record last updated2025 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Puerto Rico
There are 144 endocrinology, diabetes & metabolism physician records in Puerto Rico.
All 144 in Puerto Rico → Every provider in Mayaguez → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Denise Caro, M.D.Mayaguez, PR 006801134221724
- Jose Gandara, MDMayaguez, PR 006801518963008
- Coral Jimenez Rovira, MDMayaguez, PR 006801326665746
- Carlos Martinez Rivera, MDMayaguez, PR 006801356330310
- Yadiel Rivera-Nieves, MDMayaguez, PR 006801205368347
- Rose Roman Torres, M.D.Mayaguez, PR 006801124433909
- Carlos Santiagoalicea, M.D.Mayaguez, PR 006801346218310
- David Lopez RodriguezMayaguez, PR 006821295343267
Common questions
What is Dannel Diaz Ruiz, MD's NPI number?
Dannel Diaz Ruiz, MD's National Provider Identifier (NPI) is 1679066435, issued on Jun 7, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Dannel Diaz Ruiz, MD located?
The NPPES record lists a practice address at 313 Calle Pirineo, Mayaguez, PR, 00680. Phone: (787) 477-8410. Providers update this record themselves, so call before visiting.
How can I verify Dannel Diaz Ruiz, MD's license?
NPPES lists Puerto Rico license number 23235, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Dannel Diaz Ruiz, MD prescribe under Medicare Part D?
In 2024, Dannel Diaz Ruiz, MD had 1,694 Medicare Part D claims for 419 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.