Guillermo A. Pagan Calo, M.D.
General Practice Physician · Hormigueros, PR
Guillermo A. Pagan Calo, M.D. is a general practice physician with a practice address in Hormigueros, Puerto Rico, and NPI 1891821815, issued on Feb 26, 2007. Check the license (Puerto Rico 14386, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Guillermo A. Pagan Calo
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 14386 PR
Self-reported in NPPES; status is on the state search - Practice location
- Plaza Constancia Segundo Piso, Hormigueros, PR 00660
- Phone
- (787) 849-3845
- Enumerated
- Feb 26, 2007
- Record last updated
- Oct 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (787) 849-3845
- Medicare enrollment
- Enrolled (PECOS I20050201000398); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 4,170 in Puerto Rico → Look up another NPI →
Verify Guillermo A. Pagan Calo 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 14386Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average general practice physician in 2024
3,798 Medicare Part D claims for 220 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 31 claims were for opioids.
Most prescribed
- Atorvastatin Calcium250 claims
- Losartan Potassium167 claims
- Gabapentin140 claims
- Levothyroxine Sodium134 claims
- Simvastatin118 claims
- Clopidogrel111 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.
Guillermo A. Pagan Calo among 4,170 general practice physician records in Puerto Rico
Guillermo A. Pagan Calo, M.D. is one of 4,170 general practice physician records with a practice address in Puerto Rico. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 51% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated2000 · median 2004 among the 1,228 with a school on file
- Record last updated2012 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 general practice physician records list a practice address in Hormigueros
They are 27 of the 127 NPPES records with a practice address in Hormigueros, and 4,170 general practice physician records in Puerto Rico.
All 4,170 in Puerto Rico → Every provider in Hormigueros → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Alexis Acosta, M.D.Hormigueros, PR 006601619925690
- Luis Alvarez-Arroyo, MDHormigueros, PR 006601962588830
- Luz Baez Mendez, M.D.Hormigueros, PR 006601083687800
- Simon Carlo, M.D.Hormigueros, PR 006601548350564
- Ananska Carlo, MDHormigueros, PR 006601821147448
- Luz Jimenez Morales, MDHormigueros, PR 006601710950183
- Cindy Martinez Torres, M.D.Hormigueros, PR 006601700947009
- Rafael Mendoza-Irizarry, M.D.Hormigueros, PR 006601629185830
Common questions
What is Guillermo A. Pagan Calo, M.D.'s NPI number?
Guillermo A. Pagan Calo, M.D.'s National Provider Identifier (NPI) is 1891821815, issued on Feb 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo A. Pagan Calo, M.D. located?
The NPPES record lists a practice address at Plaza Constancia Segundo Piso, Hormigueros, PR, 00660. Phone: (787) 849-3845. Providers update this record themselves, so call before visiting.
How can I verify Guillermo A. Pagan Calo, M.D.'s license?
NPPES lists Puerto Rico license number 14386, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Guillermo A. Pagan Calo, M.D. prescribe under Medicare Part D?
In 2024, Guillermo A. Pagan Calo, M.D. had 3,798 Medicare Part D claims for 220 beneficiaries; the average among general practice physician prescribers was 3,030. 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.