Guillermo Armaiz, M.D.
Internal Medicine Physician · Vega Baja, PR
Guillermo Armaiz, M.D. is an internal medicine physician with a practice address in Vega Baja, Puerto Rico, and NPI 1598740920, issued on Dec 8, 2005. Check the license (Puerto Rico 6843, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Guillermo Armaiz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 6843 PR
Self-reported in NPPES; status is on the state search - Practice location
- 50 Jose J Acosta St, Vega Baja, PR 00693
- Phone
- (787) 858-6077
- Enumerated
- Dec 8, 2005
- Entity
- Type 1 · individual
Verify Guillermo Armaiz 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 6843Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
24 Medicare Part D claims for 14 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D.
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.
12 internal medicine physician records list a Vega Baja practice address
They are 12 of the 392 NPPES records with a Vega Baja practice address, and 1,357 internal medicine physician records in Puerto Rico.
All 12 in Vega Baja → All 1,357 in Puerto Rico → Every provider in Vega Baja →
Other internal medicine physician records in Puerto Rico
- Jamil Abou El Hossen Carmona, MDRio Piedras, PR1700575495
- Jamil Abouelhossen, MDFajardo, PR1356347538
- James Abrams, MDSan Juan, PR1861721789
- Fernando Abreu GonzalezSan Juan, PR1437100930
- Jumana Abuomar, M.D.Canovanas, PR1104028307
- Lourdes Acevedo, M.D.Aguada, PR1487751574
- Luis Acevedo Aquino, MDAguadilla, PR1477128999
- Sara Acevedo Armaiz, MDCarolina, PR1194731711
- Luis Acevedo Rodriguez, M.D..Guaynabo, PR1326149121
- Luis Acevedo Soto, MDMayaguez, PR1851084412
Common questions
What is Guillermo Armaiz, M.D.'s NPI number?
Guillermo Armaiz, M.D.'s National Provider Identifier (NPI) is 1598740920, issued on Dec 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Armaiz, M.D. located?
The NPPES record lists a practice address at 50 Jose J Acosta St, Vega Baja, PR, 00693. Phone: (787) 858-6077. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Armaiz, M.D.'s license?
NPPES lists Puerto Rico license number 6843, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Guillermo Armaiz, M.D. prescribe under Medicare Part D?
In 2024, Guillermo Armaiz, M.D. had 24 Medicare Part D claims for 14 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.