Dr. Eric Chongze Ma, MD

  • Danbury, CT
  • Hematologist and oncologist
NPI1205078862PAC ID0244452803
Medicare services, 2024
1,783
Medicare patients, 2024
392
Part D claims, 2024
1,408
Publications
5
Hospital affiliations
1
Practice address
100 Reserve Rd, Danbury, CT 06810
Practice phone
Call (203) 739-7742
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Nuvance Health Medical Practice CT, Inc.

Danbury, Connecticut

See all 4 affiliations

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Dr. Eric Chongze Ma is a hematologist and oncologist in Danbury, Connecticut

Dr. Ma practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut.

Dr. Ma's NPI, 1205078862, was assigned on March 29, 2009. Dr. Ma holds Connecticut license 61788.

NPI and contact details
Medicare PAC ID
0244452803
NPI enumeration date
March 29, 2009
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(203) 739-7742
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
54
Medical school graduation
1998

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

Dr. Eric Chongze Ma practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut

Dr. Ma's primary practice is Nuvance Health Medical Practice CT, Inc., at 100 Reserve Rd, Danbury, CT 06810 in Western Ct County. The practice phone is (203) 739-7742.

  • Nuvance Health Medical Practice CT, Inc.
    100 Reserve Rd, Danbury, CT 06810 · Western Ct CountyPhone(203) 739-7742

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

Dr. Eric Chongze Ma is affiliated with 3 sites of care and 1 medical group

Dr. Ma's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dr. Ma is also affiliated with Northwell Danbury Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Dr. Ma to 1 more hospice, named with a free account.

See all 4 affiliations for Dr. Ma

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 Dr. Eric Chongze Ma's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Nuvance Health Medical Practice CT, Inc.Available with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Eric Chongze Ma is one of 175 hematologists and oncologists in Connecticut

Hematology and oncology is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Ma is licensed in Connecticut.

Specialties and state licenses

  • Hematology and oncology, ConnecticutPrimaryLicense 61788 · taxonomy 207RH0003X

Hematologists and oncologists near Dr. Ma

Counts of hematologists and oncologists 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. Eric Chongze Ma billed Medicare for 1,783 services in 2024

CMS data shows 1,783 Medicare services from Dr. Ma across 10 procedure codes in 2024, for 392 Medicare patients. Medicare paid $124,560 for them.

Medicare services, 20241,783
Medicare patients392
Paid by Medicare$124,560
Procedure codes10

Dr. Ma's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1,3362024: 1,12616%
Lab and pathology
2023: 6472024: 47327%
Surgery
2023: 3022024: 18439%

Where Dr. Ma's Medicare services took place, 2024

  • In an office1,65693%
  • In a facility1277%

Dr. Ma compared with the Connecticut median for hematologists and oncologists, 2024

  • Dr. Ma
  • Connecticut median
Medicare services
1,783vs 5413.3 times
Medicare patients
392vs 20888% above
Part D claims
1,128vs 4512.5 times

Medians across 168 hematologists and oncologists in Connecticut with Dmand AI profiles that report each measure.

Dr. Ma's 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 Dr. Ma

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

Dr. Eric Chongze Ma treated 392 Medicare patients in 2024, average age 76

CMS counts 392 Medicare patients who saw Dr. Ma in 2024. The largest group is 75 to 84, with 152 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.14, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Ma's median patient age at 74, with 40% women.

Medicare patients, 2024392
Average age76
Average risk score2.14
Also on Medicaid20%

Dr. Ma's Medicare patients by age, 2024

Dr. Ma's Medicare patients by sex, 2024

  • Women16241%
  • Men23059%

Chronic conditions among Dr. Ma's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis48%
  4. Cancer39%
  5. Ischemic heart disease38%
  6. Chronic kidney disease37%
  7. Anxiety32%
  8. Diabetes30%

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

Dr. Ma's patients across all payers

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

Patient panel by age, all payers

Median age 74

Patient panel by sex, all payers

  • Women40%
  • Men58%

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

Dr. Eric Chongze Ma wrote 1,408 Medicare Part D claims in 2024

In 2024, Dr. Ma wrote 1,408 Medicare Part D claims for 253 patients. 67% of them were for generic drugs. CMS names the drug for 1,128 of them, across 34 drugs with 11 or more claims each, at $4,254,380 in total drug cost. In 2023, CMS named 1,097 claims across 30 drugs.

Part D claims, 20241,408
Drugs named by CMS34
Total drug cost$4.3M
Part D patients253

Dr. Ma's Part D claims by kind of drug, 2024

  • Generic938 claims67%
  • Brand-name and other470 claims33%

Dr. Ma'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. Ma's Part D claims, 2024

  • Opioids6%79 of 1,408 claims
  • Antibiotics2%30 of 1,408 claims
  • Antipsychotics, patients 65 and over2%26 of 1,408 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: 1,0972024: 1,1283%

Drugs named by CMS: 34 in 2024, 30 in 2023.

See all prescribing by Dr. Ma

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

Dr. Eric Chongze Ma offers telehealth to Medicare patients

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

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Eric Chongze Ma has 5 publications on record

Dmand AI links 5 papers to Dr. Ma, published from 2022 to 2025. 2023 was the busiest year, with 3. The most frequent topics are CD47 Antigen, Diet, High-Fat and Liver. Dr. Ma has published most often in Cureus. Dr. Ma's most frequent co-authors are Nisha Nepal, MD, Prabasha Ranmini Weeraddana, MD and Mehndi Dandwani, MD.

Papers5
Years published2022 to 2025

Dr. Ma's papers by year, 2022 to 2025

Topics Dr. Ma writes about most

  • CD47 Antigen
  • Diet, High-Fat
  • Liver
  • Mice, Inbred C57BL

Dr. Ma's most frequent co-authors

Recent publications by Dr. Ma

See all 5 publications and co-authors

See who Dr. Ma researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ma works with, so you can find a warm path to the right hematologists and oncologists.

How network discovery works

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

Dr. Eric Chongze Ma received $11,429 in industry payments from 2017 to 2025

CMS Open Payments shows 404 general payments to Dr. Ma from 46 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 74% of the total. Deciphera Pharmaceuticals Inc. paid the most, $2,662.

General payments to Dr. Ma by program year, 2017 to 2025

General payments to Dr. Ma by kind, 2017 to 2025

$11.4Kin total
  • Food and beverage$8,41474%
  • Honoraria$1,65014%
  • Travel and lodging$8628%
  • Education$5034%

Companies that paid Dr. Ma the most, 2017 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Ma

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

Sources for Dr. Eric Chongze Ma'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 Dr. Eric Chongze Ma

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. Eric Chongze Ma's NPI number?

Dr. Eric Chongze Ma's NPI number is 1205078862. It was assigned on March 29, 2009, and it is active in the NPI Registry.

What kind of doctor is Dr. Eric Chongze Ma?

Dr. Eric Chongze Ma is a hematologist and oncologist in Danbury, Connecticut. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).

Where does Dr. Eric Chongze Ma practice?

Dr. Ma practices at 100 Reserve Rd, Danbury, CT 06810. Dr. Ma's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dmand AI also links Dr. Ma to 1 hospice.

What is Dr. Eric Chongze Ma's office phone number?

The practice phone on file for Dr. Ma is (203) 739-7742.

What is Dr. Eric Chongze Ma's medical license number?

Dr. Ma holds Connecticut license 61788.

Which hospitals is Dr. Eric Chongze Ma affiliated with?

Dr. Ma is affiliated with Northwell Danbury Hospital.

What medical group is Dr. Eric Chongze Ma part of?

Dr. Ma is linked to Danbury Medical Group.

Does Dr. Eric Chongze Ma accept Medicare?

Yes. CMS data shows Dr. Ma billed Medicare for 1,783 services in 2024, and Dr. Ma accepts Medicare assignment.

Does Dr. Eric Chongze Ma offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Ma as offering telehealth services.

How many Medicare patients does Dr. Eric Chongze Ma see?

CMS counts 392 Medicare patients who saw Dr. Ma in 2024, with an average age of 76.

Show 6 more questionsShow fewer questions

What services does Dr. Eric Chongze Ma bill to Medicare?

In 2024, Dr. Ma's most billed Medicare services were office visit, established patient (99214), lab and pathology test (85025) and surgery: heart and blood vessels (36415).

What drugs does Dr. Eric Chongze Ma prescribe most?

In 2024 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Revlimid, Ondansetron HCl and Acyclovir.

Has Dr. Eric Chongze Ma received payments from drug or device companies?

CMS Open Payments shows $11,429 in general payments to Dr. Ma from 46 companies from 2017 to 2025. The largest total came from Deciphera Pharmaceuticals Inc.

How long has Dr. Eric Chongze Ma been practicing?

Dr. Ma graduated from medical school in 1998, 28 years ago.

Does Dr. Eric Chongze Ma do research?

Dmand AI links 5 publications to Dr. Ma, published from 2022 to 2025.

Who does Dr. Eric Chongze Ma publish with?

Dr. Ma's most frequent co-authors are Nisha Nepal, MD (2 shared papers), Prabasha Ranmini Weeraddana, MD (2 shared papers) and Mehndi Dandwani, MD (1 shared paper).

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