Maria Marrero, NP
- Medicare patients, 2024
- 153
- Part D claims, 2024
- 1,523
- Hospital affiliations
- 6
- Industry payments
- $1,092
- Medical groups
- 2
- Practice address
- 1001 Calumet Ave, Dyer, IN 46311
- Practice phone
- Call (219) 924-8178
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwest Cancer Centers
Dyer, Indiana
Find Maria Marrero'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.
Maria Marrero is a family nurse practitioner in Dyer, Indiana
Maria Marrero practices at Northwest Cancer Centers in Dyer, Indiana.
Maria Marrero's NPI, 1396122784, was assigned on May 5, 2015. Maria Marrero holds Indiana license 71005463A.
- NPI
- 1396122784NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860703360
- NPI enumeration date
- May 5, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (219) 924-8178
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Maria Marrero practices at Northwest Cancer Centers in Dyer, Indiana
Maria Marrero's primary practice is Northwest Cancer Centers, at 1001 Calumet Ave, Dyer, IN 46311 in Lake County. The practice phone is (219) 924-8178.
- Northwest Cancer Centers1001 Calumet Ave, Dyer, IN 46311 · Lake CountyPhone(219) 924-8178
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Maria Marrero is affiliated with 8 sites of care and 2 medical groups
Maria Marrero's primary practice is Northwest Cancer Centers in Dyer, Indiana. Maria Marrero is also affiliated with Franciscan Health Dyer. The medical group on file is Northwest Cancer Centers. Dmand AI also links Maria Marrero to 5 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Maria Marrero's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Maria Marrero practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwest Cancer Centers | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Maria Marrero is one of 4,830 family nurse practitioners in Indiana
Family is Maria Marrero's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Maria Marrero is licensed in Indiana.
Specialties and state licenses
- Family nurse practitioner, IndianaPrimary
Family nurse practitioners near Maria Marrero
Counts of family nurse practitioners 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
Maria Marrero treated 153 Medicare patients in 2024, average age 76
CMS counts 153 Medicare patients who saw Maria Marrero in 2024. The largest group is 75 to 84, with 69 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 2.73, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Maria Marrero's median patient age at 73, with 57% women.
Maria Marrero's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Maria Marrero's Medicare patients by sex, 2024
- Women8858%
- Men6542%
Chronic conditions among Maria Marrero's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Cancer51%
- Ischemic heart disease48%
- Chronic kidney disease44%
- Diabetes41%
- Atrial fibrillation33%
Share of Medicare patients with each condition. A patient can have several.
Maria Marrero's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Maria Marrero wrote 1,523 Medicare Part D claims in 2024
In 2024, Maria Marrero wrote 1,523 Medicare Part D claims for 286 patients. 81% of them were for generic drugs.
Maria Marrero's Part D claims by kind of drug, 2024
- Generic1,233 claims81%
- Brand-name and other290 claims19%
Drug classes CMS tracks in Maria Marrero's Part D claims, 2024
- Opioids10%145 of 1,523 claims
- Antibiotics7%112 of 1,523 claims
- Antipsychotics, patients 65 and over1%11 of 1,523 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Maria Marrero takes part in Medicare
Maria Marrero 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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Maria Marrero received $1,092 in industry payments in 2025
CMS Open Payments shows 47 general payments to Maria Marrero from 23 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $194.
Companies that paid Maria Marrero the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Maria Marrero'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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 Maria Marrero
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Maria Marrero's NPI number?
Maria Marrero's NPI number is 1396122784. It was assigned on May 5, 2015, and it is active in the NPI Registry.
What does Maria Marrero specialize in?
Maria Marrero is a family nurse practitioner in Dyer, Indiana. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Maria Marrero practice?
Maria Marrero practices at 1001 Calumet Ave, Dyer, IN 46311. Maria Marrero's primary practice is Northwest Cancer Centers in Dyer, Indiana. Dmand AI also links Maria Marrero to 5 hospitals, 1 group practice or clinic and 1 medical group.
What is Maria Marrero's office phone number?
The practice phone on file for Maria Marrero is (219) 924-8178.
What is Maria Marrero's medical license number?
Maria Marrero holds Indiana license 71005463A.
Which hospitals is Maria Marrero affiliated with?
Maria Marrero is affiliated with Franciscan Health Dyer. Dmand AI links Maria Marrero to 5 more hospitals.
What medical group is Maria Marrero part of?
Maria Marrero is linked to Northwest Cancer Centers. Dmand AI links Maria Marrero to 1 more medical group.
Does Maria Marrero accept Medicare?
Yes. CMS lists Maria Marrero as accepting Medicare assignment.
How many Medicare patients does Maria Marrero see?
CMS counts 153 Medicare patients who saw Maria Marrero in 2024, with an average age of 76.
Has Maria Marrero received payments from drug or device companies?
CMS Open Payments shows $1,092 in general payments to Maria Marrero from 23 companies from 2025 to 2025. The largest total came from Abbvie Inc.
How long has Maria Marrero been practicing?
Maria Marrero graduated from medical school in 2014, 12 years ago.
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