Tresa Reena Mascarenhas, MBBS

  • Wilmington, DE
  • Infectious disease specialist
NPI1477846079PAC ID0143468736
Medicare services, 2024
1,070
Medicare patients, 2024
324
Part D claims, 2024
603
Publications
1
Hospital affiliations
4
Practice address
501 W 14th St, Wilmington, DE 19801
Practice phone
Call (302) 733-1000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

ChristianaCare Wilmington Hospital

Wilmington, Delaware

See all 7 affiliations

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Tresa Reena Mascarenhas is an infectious disease specialist in Wilmington, Delaware

Tresa Mascarenhas practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware.

Tresa Mascarenhas' NPI, 1477846079, was assigned on May 16, 2011. Tresa Mascarenhas holds Delaware license C10011090.

NPI and contact details
Medicare PAC ID
0143468736
NPI enumeration date
May 16, 2011
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(302) 733-1000
Professional email
Get email
Personal email
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Mobile number
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Sex
Female
Estimated age
44
Medical school graduation
2008

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Tresa Reena Mascarenhas practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware

Tresa Mascarenhas' primary practice is ChristianaCare Wilmington Hospital, at 501 W 14th St, Wilmington, DE 19801 in New Castle County. The practice phone is (302) 733-1000.

  • ChristianaCare Wilmington Hospital
    501 W 14th St, Wilmington, DE 19801 · New Castle CountyPhone(302) 733-1000

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Tresa Reena Mascarenhas is affiliated with 6 sites of care and 1 medical group

Tresa Mascarenhas' primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. Tresa Mascarenhas is also affiliated with Saint Francis Hospital. The medical group on file is Infectious Disease Consultants. Dmand AI also links Tresa Mascarenhas to 3 more hospitals and 1 group practice or clinic, each named with a free account.

See all 7 affiliations for Tresa Mascarenhas

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Tresa Reena Mascarenhas' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Tresa Mascarenhas practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
ChristianaCare Wilmington HospitalAvailable with a free account
+5 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Tresa Reena Mascarenhas is one of 28 infectious disease specialists in Delaware

Infectious disease is Tresa Mascarenhas' primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Tresa Mascarenhas is licensed in Delaware.

Specialties and state licenses

  • Infectious disease, DelawarePrimaryLicense C10011090 · taxonomy 207RI0200X

Infectious disease specialists near Tresa Mascarenhas

Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.

28infectious disease specialists in Delaware
5infectious disease specialists in Wilmington

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Tresa Reena Mascarenhas billed Medicare for 1,070 services in 2024

CMS data shows 1,070 Medicare services from Tresa Mascarenhas across 6 procedure codes in 2024, for 324 Medicare patients. Medicare paid $96,353 for them.

Medicare services, 20241,070
Medicare patients324
Paid by Medicare$96,353
Procedure codes6

Tresa Mascarenhas' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1,3862024: 1,07023%

Where Tresa Mascarenhas' Medicare services took place, 2024

  • In an office10510%
  • In a facility96590%

Tresa Mascarenhas compared with the Delaware median for infectious disease specialists, 2024

  • Tresa Mascarenhas
  • Delaware median
Medicare services
1,070vs 70153% above
Medicare patients
324vs 28613% above
Part D claims
455vs 40113% above

Medians across 26 infectious disease specialists in Delaware with Dmand AI profiles that report each measure.

Tresa Mascarenhas' most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Tresa Mascarenhas

Need commercial claims for Tresa Mascarenhas?

Medicare shows one payer. Book a meeting to get commercial claims data for Tresa Mascarenhas and other infectious disease specialists in Delaware.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Tresa Reena Mascarenhas treated 324 Medicare patients in 2024, average age 74

CMS counts 324 Medicare patients who saw Tresa Mascarenhas in 2024. The largest group is 65 to 74, with 128 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 3.17, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Tresa Mascarenhas' median patient age at 69, with 47% women.

Medicare patients, 2024324
Average age74
Average risk score3.17
Also on Medicaid23%

Tresa Mascarenhas' Medicare patients by age, 2024

Tresa Mascarenhas' Medicare patients by sex, 2024

  • Women17855%
  • Men14645%

Chronic conditions among Tresa Mascarenhas' Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis57%
  4. Diabetes51%
  5. Mood disorders51%
  6. Chronic kidney disease50%
  7. Ischemic heart disease50%
  8. Anxiety47%

Share of Medicare patients with each condition. A patient can have several.

Tresa Mascarenhas' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 69

Patient panel by sex, all payers

  • Women47%
  • Men50%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Tresa Reena Mascarenhas wrote 603 Medicare Part D claims in 2024

In 2024, Tresa Mascarenhas wrote 603 Medicare Part D claims for 96 patients. 67% of them were for generic drugs. CMS names the drug for 455 of them, across 21 drugs with 11 or more claims each, at $715,877 in total drug cost. In 2023, CMS named 410 claims across 23 drugs.

Part D claims, 2024603
Drugs named by CMS21
Total drug cost$715,877
Part D patients96

Tresa Mascarenhas' Part D claims by kind of drug, 2024

  • Generic406 claims67%
  • Brand-name197 claims33%

Tresa Mascarenhas' 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 Tresa Mascarenhas' Part D claims, 2024

  • Antibiotics50%304 of 603 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: 4102024: 45511%

Drugs named by CMS: 21 in 2024, 23 in 2023.

See all prescribing by Tresa Mascarenhas

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

Tresa Reena Mascarenhas offers telehealth to Medicare patients

Tresa Mascarenhas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Tresa Mascarenhas as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Tresa Reena Mascarenhas has 1 publication on record

Dmand AI links 1 paper to Tresa Mascarenhas in 2018. Tresa Mascarenhas' most frequent co-authors are Katherine A. Belden, MD and Randi S. Silibovsky, MD.

Papers1

Tresa Mascarenhas' most frequent co-authors

Recent publications by Tresa Mascarenhas

See all 1 publications and co-authors

See who Tresa Mascarenhas researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Tresa Mascarenhas works with, so you can find a warm path to the right infectious disease specialists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Tresa Reena Mascarenhas received $813 in industry payments from 2016 to 2025

CMS Open Payments shows 27 general payments to Tresa Mascarenhas from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 77% of the total. Merck Sharp & Dohme Corporation paid the most, $159.

General payments to Tresa Mascarenhas by program year, 2016 to 2025

General payments to Tresa Mascarenhas by kind, 2016 to 2025

$813in total
  • Food and beverage$62277%
  • Education$19023%

Companies that paid Tresa Mascarenhas the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Tresa Mascarenhas

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Tresa Reena Mascarenhas's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Tresa Reena Mascarenhas

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Tresa Reena Mascarenhas' NPI number?

Tresa Reena Mascarenhas' NPI number is 1477846079. It was assigned on May 16, 2011, and it is active in the NPI Registry.

What does Tresa Reena Mascarenhas specialize in?

Tresa Reena Mascarenhas is an infectious disease specialist in Wilmington, Delaware. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).

Where does Tresa Reena Mascarenhas practice?

Tresa Mascarenhas practices at 501 W 14th St, Wilmington, DE 19801. Tresa Mascarenhas' primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. Dmand AI also links Tresa Mascarenhas to 3 hospitals and 1 group practice or clinic.

What is Tresa Reena Mascarenhas' office phone number?

The practice phone on file for Tresa Mascarenhas is (302) 733-1000.

What is Tresa Reena Mascarenhas' medical license number?

Tresa Mascarenhas holds Delaware license C10011090.

Which hospitals is Tresa Reena Mascarenhas affiliated with?

Tresa Mascarenhas is affiliated with Saint Francis Hospital. Dmand AI links Tresa Mascarenhas to 3 more hospitals.

What medical group is Tresa Reena Mascarenhas part of?

Tresa Mascarenhas is linked to Infectious Disease Consultants.

Does Tresa Reena Mascarenhas accept Medicare?

Yes. CMS data shows Tresa Mascarenhas billed Medicare for 1,070 services in 2024, and Tresa Mascarenhas accepts Medicare assignment.

Does Tresa Reena Mascarenhas offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Tresa Mascarenhas as offering telehealth services.

How many Medicare patients does Tresa Reena Mascarenhas see?

CMS counts 324 Medicare patients who saw Tresa Mascarenhas in 2024, with an average age of 74.

Show 6 more questionsShow fewer questions

What services does Tresa Reena Mascarenhas bill to Medicare?

In 2024, Tresa Mascarenhas' most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99223).

What drugs does Tresa Reena Mascarenhas prescribe most?

In 2024 Medicare Part D data, Tresa Mascarenhas' most prescribed drugs by claims were Biktarvy, Genvoya and Cefadroxil.

Has Tresa Reena Mascarenhas received payments from drug or device companies?

CMS Open Payments shows $813 in general payments to Tresa Mascarenhas from 10 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.

How long has Tresa Reena Mascarenhas been practicing?

Tresa Mascarenhas graduated from medical school in 2008, 18 years ago.

Does Tresa Reena Mascarenhas do research?

Dmand AI links 1 publication to Tresa Mascarenhas.

Who does Tresa Reena Mascarenhas publish with?

Tresa Mascarenhas' most frequent co-authors are Katherine A. Belden, MD (1 shared paper) and Randi S. Silibovsky, MD (1 shared paper).

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