Guillermo Serrano, M.D.
General Practice Physician · Sabana Grande, PR
Guillermo Serrano, M.D. is a general practice physician with a practice address in Sabana Grande, Puerto Rico, and NPI 1821474354, issued on Aug 6, 2015. Check the license (Puerto Rico 019138, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Guillermo Serrano
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 019138 PR
Self-reported in NPPES; status is on the state search - Practice location
- HC 10 Box 8724, Sabana Grande, PR 00637
- Phone
- (917) 336-7757
- Enumerated
- Aug 6, 2015
- Record last updated
- Aug 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 4,170 in Puerto Rico → Look up another NPI →
Verify Guillermo Serrano 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 019138Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average general practice physician in 2024
116 Medicare Part D claims for 65 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D.
Most prescribed
- Dexamethasone32 claims
- Amoxicillin-Clavulanate Potass26 claims
- Azithromycin19 claims
- Ketorolac Tromethamine17 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 Serrano among 4,170 general practice physician records in Puerto Rico
Guillermo Serrano, 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 2015, is newer than 62% of them.
- NPI issued2015 · 62% of these records are older, 37% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 29% of these records are
- Record last updated2015 · 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).
23 general practice physician records list a practice address in Sabana Grande
They are 23 of the 136 NPPES records with a practice address in Sabana Grande, and 4,170 general practice physician records in Puerto Rico.
All 4,170 in Puerto Rico → Every provider in Sabana Grande → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Edwin Antommattei, MDSabana Grande, PR 006371841261443
- Edwin Casiano, M.D.Sabana Grande, PR 006371609073238
- Luis Casiano Sanchez, MDSabana Grande, PR 006371740240241
- Nestor Feliz, MDSabana Grande, PR 006371477663615
- Sandra Figueroa, M.D.Sabana Grande, PR 006371215925904
- Jorge Irizarry-Hornedo, M.D.Sabana Grande, PR 006371144263351
- Brian Montalvo, M.D.Sabana Grande, PR 006371437288552
- Sibel Pabon Reyes, MDSabana Grande, PR 006371104801224
Common questions
What is Guillermo Serrano, M.D.'s NPI number?
Guillermo Serrano, M.D.'s National Provider Identifier (NPI) is 1821474354, issued on Aug 6, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Serrano, M.D. located?
The NPPES record lists a practice address at HC 10 Box 8724, Sabana Grande, PR, 00637. Phone: (917) 336-7757. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Serrano, M.D.'s license?
NPPES lists Puerto Rico license number 019138, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Guillermo Serrano, M.D. prescribe under Medicare Part D?
In 2024, Guillermo Serrano, M.D. had 116 Medicare Part D claims for 65 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.