Henry Xavier Nieves Diaz, MD
Addiction Medicine (Family Medicine) Physician · Manati, PR
Henry Xavier Nieves Diaz, MD is an addiction medicine (family medicine) physician with a practice address in Manati, Puerto Rico, and NPI 1588168850, issued on Mar 21, 2018. Check the license (Puerto Rico 21671, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Henry Xavier Nieves Diaz
- Credential
- MD
- Primary taxonomy
- Addiction Medicine (Family Medicine) Physician 207QA0401X
- License number
- 21671 PR
Self-reported in NPPES; status is on the state search - Practice location
- Manati Medical Center, Manati, PR 00674
- Phone
- (787) 621-3700
- Enumerated
- Mar 21, 2018
- Record last updated
- Jun 30, 2025
- Medicare enrollment
- Enrolled (PECOS I20251124002763); may accept Medicare assignment
- Medical or professional school
- University Central Del Caribe Escuela De Medicina, 2025
- Entity
- Type 1 · individual
4 nearest addiction medicine (family medicine) physician records → All 5 in Puerto Rico → Look up another NPI →
Also registered at Manati Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Henry Xavier Nieves Diaz 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 21671Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average addiction medicine (family medicine) physician in 2024
21 Medicare Part D claims, against an average of 664 among the 581 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $455.15
10 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 305 providers of this specialty with any payment received $1,151.00 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.
Addiction Medicine (Family Medicine) Physician providers in Puerto Rico
There are 5 addiction medicine (family medicine) physician records in Puerto Rico.
All 5 in Puerto Rico → Every provider in Manati → Addiction Medicine (Family Medicine) Physician nationwide →
The 4 addiction medicine (family medicine) physician records with the nearest ZIP codes
- Veronica Rivera, MDManati, PR 006741750940292
- Luis Valle Pena, MDAguadilla, PR 006031033186481
- Laura Corominas, MDSan Juan, PR 009181922625367
- Angelica Fuentes Armesto, MD, DABFMBayamon, PR 009601205419439
Common questions
What is Henry Xavier Nieves Diaz, MD's NPI number?
Henry Xavier Nieves Diaz, MD's National Provider Identifier (NPI) is 1588168850, issued on Mar 21, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Henry Xavier Nieves Diaz, MD located?
The NPPES record lists a practice address at Manati Medical Center, Manati, PR, 00674. Phone: (787) 621-3700. Providers update this record themselves, so call before visiting.
How can I verify Henry Xavier Nieves Diaz, MD's license?
NPPES lists Puerto Rico license number 21671, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Henry Xavier Nieves Diaz, MD prescribe under Medicare Part D?
In 2024, Henry Xavier Nieves Diaz, MD had 21 Medicare Part D claims; the average among addiction medicine (family medicine) physician prescribers was 664. 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.