Dr. Nancy Marrero Viera, MD
- Medicare services, 2021
- 4,133
- Part D claims, 2024
- 12,555
- Hospital affiliations
- 1
- Industry payments
- $819
- State license
- 1
- Practice address
- Marginal Carretera No 2, Km 47.7, Manati, PR 00674
- Practice phone
- Call (787) 853-3322
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Marrero Viera's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nancy Marrero Viera is a general practice physician in Manati, Puerto Rico
Dr. Marrero Viera practices at Doctors' Center Hospital Orlando Health - Manati in Manati, Puerto Rico, part of Orlando Health.
Dr. Marrero Viera's NPI, 1134370091, was assigned on October 8, 2008. Dr. Marrero Viera holds Puerto Rico license 17325.
- NPI
- 1134370091NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426108697
- NPI enumeration date
- October 8, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (787) 853-3322
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nancy Marrero Viera practices at 2 locations in Manati, Puerto Rico
Dr. Marrero Viera's primary practice is Doctors' Center Hospital Orlando Health - Manati, at Marginal Carretera No 2, Km 47.7, Manati, PR 00674 in Manati County. The practice phone is (787) 853-3322. The NPI Registry lists Dr. Marrero Viera's practice address as 47 Calle 7, Manati, PR 00674.
- Doctors' Center Hospital Orlando Health - ManatiPrimaryMarginal Carretera No 2, Km 47.7, Manati, PR 00674 · Manati CountyPhone(787) 853-3322
- NPI Registry address47 Calle 7, Manati, PR 00674 · Manati CountyPhone(787) 820-8082
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Nancy Marrero Viera is affiliated with 3 sites of care
Dr. Marrero Viera's primary practice is Doctors' Center Hospital Orlando Health - Manati in Manati, Puerto Rico, part of Orlando Health. Dmand AI also links Dr. Marrero Viera to 1 physician office and 1 urgent care center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nancy Marrero Viera's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marrero Viera practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Doctors' Center Hospital Orlando Health - Manati | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nancy Marrero Viera is one of 2,604 general practice physicians in Puerto Rico
General practice is Dr. Marrero Viera's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Marrero Viera is licensed in Puerto Rico.
Specialties and state licenses
- General practice, Puerto RicoPrimary
General practice physicians near Dr. Marrero Viera
Counts of general practice physicians 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. Nancy Marrero Viera billed Medicare for 4,133 services in 2021
CMS data shows 4,133 Medicare services from Dr. Marrero Viera across 5 procedure codes in 2021. Medicare paid $87,838 for them. Every service was in an office.
Dr. Marrero Viera's Medicare services by type, 2017 to 2021
- 2017
- 2021
- Other services
- 2017: 02021: 2,321
- Tests and treatments
- 2017: 02021: 1,812
- Office and hospital visits
- 2017: 372021: 0100%
Dr. Marrero Viera compared with the Puerto Rico median for general practice physicians, 2021
- Dr. Marrero Viera
- Puerto Rico median
- Medicare services
- 4,133vs 34121.6 times
- Part D claims
- 11,949vs 73516.3 times
Medians across 3,001 general practice physicians in Puerto Rico with Dmand AI profiles that report each measure.
Dr. Marrero Viera's 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nancy Marrero Viera's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Marrero Viera's median patient age at 68, with 50% women.
Dr. Marrero Viera's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Nancy Marrero Viera wrote 12,555 Medicare Part D claims in 2024
In 2024, Dr. Marrero Viera wrote 12,555 Medicare Part D claims for 378 patients. 83% of them were for generic drugs. CMS names the drug for 11,949 of them, across 163 drugs with 11 or more claims each, at $613,299 in total drug cost. In 2023, CMS named 11,793 claims across 163 drugs.
Dr. Marrero Viera's Part D claims by kind of drug, 2024
- Generic10,479 claims83%
- Brand-name1,865 claims15%
- Other211 claims2%
Dr. Marrero Viera's 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. Marrero Viera's Part D claims, 2024
- Opioids1%147 of 12,555 claims
- Antibiotics2%216 of 12,555 claims
- Antipsychotics, patients 65 and over0%22 of 12,555 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: 11,7932024: 11,9491%
Drugs named by CMS: 163 in 2024, 163 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
How Dr. Nancy Marrero Viera takes part in Medicare
Dr. Marrero Viera accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nancy Marrero Viera received $819 in industry payments from 2016 to 2025
CMS Open Payments shows 38 general payments to Dr. Marrero Viera from 9 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, $381.
General payments to Dr. Marrero Viera by program year, 2016 to 2025
Companies that paid Dr. Marrero Viera 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. Nancy Marrero Viera'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Nancy Marrero Viera
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nancy Marrero Viera's NPI number?
Dr. Nancy Marrero Viera's NPI number is 1134370091. It was assigned on October 8, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Nancy Marrero Viera?
Dr. Nancy Marrero Viera is a general practice physician in Manati, Puerto Rico. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Nancy Marrero Viera practice?
Dr. Marrero Viera practices at Marginal Carretera No 2, Km 47.7, Manati, PR 00674. Dr. Marrero Viera also practices at 47 Calle 7, Manati, PR 00674. Dr. Marrero Viera's primary practice is Doctors' Center Hospital Orlando Health - Manati in Manati, Puerto Rico, part of Orlando Health. Dmand AI also links Dr. Marrero Viera to 1 physician office and 1 urgent care center.
What is Dr. Nancy Marrero Viera's office phone number?
The practice phone on file for Dr. Marrero Viera is (787) 853-3322.
What is Dr. Nancy Marrero Viera's medical license number?
Dr. Marrero Viera holds Puerto Rico license 17325.
Which hospitals is Dr. Nancy Marrero Viera affiliated with?
Dr. Marrero Viera practices at Doctors' Center Hospital Orlando Health - Manati in Manati, Puerto Rico.
Does Dr. Nancy Marrero Viera accept Medicare?
Yes. CMS data shows Dr. Marrero Viera billed Medicare for 4,133 services in 2021, and Dr. Marrero Viera accepts Medicare assignment.
What services does Dr. Nancy Marrero Viera bill to Medicare?
In 2021, Dr. Marrero Viera's most billed Medicare services were medical service (91300), medical service (0002A) and medical service (0001A).
What drugs does Dr. Nancy Marrero Viera prescribe most?
In 2024 Medicare Part D data, Dr. Marrero Viera's most prescribed drugs by claims were Famotidine, Gabapentin and Pantoprazole Sodium.
Has Dr. Nancy Marrero Viera received payments from drug or device companies?
CMS Open Payments shows $819 in general payments to Dr. Marrero Viera from 9 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Nancy Marrero Viera been practicing?
Dr. Marrero Viera graduated from medical school in 2007, 19 years ago.
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