Dr. Efrain M. Flores De Hostos, MD
- Medicare services, 2021
- 48
- Part D claims, 2024
- 453
- Industry payments
- $3,279
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 1050 Los Corazones Ave Suite 102 Suite 102, Mayaguez, PR 00680
- Practice phone
- Call (787) 834-5334
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave)
Primary care practice · Mayaguez, Puerto Rico
Find Dr. Flores De Hostos' professional email, personal email and mobile number
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Dr. Efrain M. Flores De Hostos is a nephrologist in Puerto Rico
Dr. Flores De Hostos practices at Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave) in Mayaguez, Puerto Rico.
Dr. Flores De Hostos' NPI, 1083710164, was assigned on September 15, 2006. Dr. Flores De Hostos holds Puerto Rico license 6559.
- NPI
- 1083710164NPI Registry (opens in a new tab)
- NPI enumeration date
- September 15, 2006
- NPI status
- Active
- Practice phone
- (787) 834-5334
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Efrain M. Flores De Hostos practices at Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave) in Mayaguez, Puerto Rico
Dr. Flores De Hostos' primary practice is Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave), at 1050 Los Corazones Ave Suite 102 Suite 102, Mayaguez, PR 00680. The practice phone is (787) 834-5334.
- Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave)1050 Los Corazones Ave Suite 102 Suite 102, Mayaguez, PR 00680Phone(787) 834-5334
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Efrain M. Flores De Hostos is affiliated with 1 site of care and 1 medical group
Dr. Flores De Hostos' primary practice is Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave) in Mayaguez, Puerto Rico. The medical group on file is Nefrologos Asociados Del Oeste.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Efrain M. Flores De Hostos' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flores De Hostos practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Efrain M. Flores De Hostos is one of 122 nephrologists in Puerto Rico
Nephrology is Dr. Flores De Hostos' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Flores De Hostos is licensed in Puerto Rico.
Specialties and state licenses
- Nephrology, Puerto RicoPrimary
Nephrologists near Dr. Flores De Hostos
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Efrain M. Flores De Hostos billed Medicare for 48 services in 2021
CMS data shows 48 Medicare services from Dr. Flores De Hostos across 2 procedure codes in 2021. Medicare paid $12,696 for them. Every service was in an office.
Dr. Flores De Hostos' Medicare services by type, 2020 to 2021
- 2020
- 2021
- Tests and treatments
- 2020: 4682021: 4890%
Dr. Flores De Hostos compared with the Puerto Rico median for nephrologists, 2021
- Dr. Flores De Hostos
- Puerto Rico median
- Medicare services
- 48vs 7031% below
- Part D claims
- 272vs 1,56883% below
Medians across 124 nephrologists in Puerto Rico with Dmand AI profiles that report each measure.
Dr. Flores De Hostos' most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Flores De Hostos and other nephrologists in Puerto Rico.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Efrain M. Flores De Hostos' patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Flores De Hostos' median patient age at 71, with 0% women.
Dr. Flores De Hostos' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Efrain M. Flores De Hostos wrote 453 Medicare Part D claims in 2024
In 2024, Dr. Flores De Hostos wrote 453 Medicare Part D claims for 29 patients. 83% of them were for generic drugs. CMS names the drug for 272 of them, across 11 drugs with 11 or more claims each, at $75,162 in total drug cost. In 2023, CMS named 229 claims across 9 drugs.
Dr. Flores De Hostos' Part D claims by kind of drug, 2024
- Generic374 claims83%
- Brand-name and other79 claims17%
Dr. Flores De Hostos' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Flores De Hostos' Part D claims, 2024
- Antibiotics3%12 of 453 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2292024: 27219%
Drugs named by CMS: 11 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Efrain M. Flores De Hostos received $3,279 in industry payments from 2016 to 2025
CMS Open Payments shows 64 general payments to Dr. Flores De Hostos from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $461.
General payments to Dr. Flores De Hostos by program year, 2016 to 2025
Companies that paid Dr. Flores De Hostos the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Efrain M. Flores De Hostos's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Efrain M. Flores De Hostos
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What is Dr. Efrain M. Flores De Hostos' NPI number?
Dr. Efrain M. Flores De Hostos' NPI number is 1083710164. It was assigned on September 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Efrain M. Flores De Hostos?
Dr. Efrain M. Flores De Hostos is a nephrologist in Puerto Rico. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Efrain M. Flores De Hostos practice?
Dr. Flores De Hostos practices at 1050 Los Corazones Ave Suite 102 Suite 102, Mayaguez, PR 00680. Dr. Flores De Hostos' primary practice is Nefrologos Asociados Del Oeste - Primary Care - Mayaguez (Los Corazones Ave) in Mayaguez, Puerto Rico.
What is Dr. Efrain M. Flores De Hostos' office phone number?
The practice phone on file for Dr. Flores De Hostos is (787) 834-5334.
What is Dr. Efrain M. Flores De Hostos' medical license number?
Dr. Flores De Hostos holds Puerto Rico license 6559.
What medical group is Dr. Efrain M. Flores De Hostos part of?
Dr. Flores De Hostos is linked to Nefrologos Asociados Del Oeste.
Does Dr. Efrain M. Flores De Hostos accept Medicare?
Yes. CMS data shows Dr. Flores De Hostos billed Medicare for 48 services in 2021.
What services does Dr. Efrain M. Flores De Hostos bill to Medicare?
In 2021, Dr. Flores De Hostos' most billed Medicare services were dialysis (90961) and dialysis (90960).
What drugs does Dr. Efrain M. Flores De Hostos prescribe most?
In 2024 Medicare Part D data, Dr. Flores De Hostos' most prescribed drugs by claims were Sevelamer Carbonate, Lanthanum Carbonate and Bumetanide.
Has Dr. Efrain M. Flores De Hostos received payments from drug or device companies?
CMS Open Payments shows $3,279 in general payments to Dr. Flores De Hostos from 24 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Efrain M. Flores De Hostos been practicing?
Dr. Flores De Hostos graduated from medical school in 1977, 49 years ago.
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