Dr. Karen J. Ma, MD
- Medicare services, 2024
- 104
- Medicare patients, 2024
- 118
- Part D claims, 2024
- 11
- MIPS score, 2024
- 87
- Hospital affiliations
- 1
- Practice address
- 1275 York Avenue, New York, NY 10065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Karen J. Ma is an internist in New York, New York
Dr. Ma practices at Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center.
Dr. Ma's NPI, 1306293246, was assigned on May 20, 2016. Dr. Ma graduated from Columbia University College of Physicians and Surgeons in 2016. Dr. Ma holds New York license 297439.
- NPI
- 1306293246NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254661861
- NPI enumeration date
- May 20, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen J. Ma practices at Memorial Sloan Kettering Cancer Center in New York, New York
Dr. Ma's primary practice is Memorial Sloan Kettering Cancer Center, at 1275 York Avenue, New York, NY 10065.
- Memorial Sloan Kettering Cancer Center1275 York Avenue, New York, NY 10065
Source: Dmand AI Affiliation Data
Dr. Karen J. Ma is affiliated with 1 site of care and 5 medical groups
Dr. Ma's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. The medical group on file is Memorial Medical Consultation Group. Dmand AI also links Dr. Ma to 4 more medical groups, 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. Karen J. Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Sloan Kettering Cancer Center | Available with a free account |
| +4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Memorial Sloan Kettering Cancer Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Karen J. Ma is one of 9,643 internists in New York
Internal medicine is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ma is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Dr. Ma
Counts of internists 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. Karen J. Ma billed Medicare for 104 services in 2024
CMS data shows 104 Medicare services from Dr. Ma across 2 procedure codes in 2024, for 118 Medicare patients. Medicare paid $15,252 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 782024: 10433%
Dr. Ma compared with the New York median for internists, 2024
- Dr. Ma
- New York median
- Medicare services
- 104vs 42676% below
- Medicare patients
- 118vs 15825% below
- Part D claims
- 269vs 62257% below
Medians across 9,428 internists in New York 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karen J. Ma treated 118 Medicare patients in 2024, average age 75
CMS counts 118 Medicare patients who saw Dr. Ma in 2024. The largest group is 65 to 74, with 51 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 3.27, 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 57, with 54% women.
Dr. Ma's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ma's Medicare patients by sex, 2024
- Women6353%
- Men5547%
Chronic conditions among Dr. Ma's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Cancer55%
- Anxiety51%
- Arthritis51%
- Diabetes44%
- Ischemic heart disease42%
- Mood disorders42%
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 57
Patient panel by sex, all payers
- Women54%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karen J. Ma wrote 11 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 11 Medicare Part D claims. They cover 15 drugs, with $30,985 in total drug cost. In 2018, CMS named 561 claims across 25 drugs.
Dr. Ma's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 5612019: 26952%
Drugs named by CMS: 15 in 2019, 25 in 2018.
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. Karen J. Ma scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Ma for performance year 2024, reported as part of a group. Dr. Ma accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Ma's MIPS scores, performance year 2024
- 87of 100Final score
- 82.5of 100Quality
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Karen J. Ma graduated from Columbia University College of Physicians and Surgeons
Dr. Ma graduated from Columbia University College of Physicians and Surgeons in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karen J. Ma'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Karen J. 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. Karen J. Ma's NPI number?
Dr. Karen J. Ma's NPI number is 1306293246. It was assigned on May 20, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen J. Ma?
Dr. Karen J. Ma is an internist in New York, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Karen J. Ma practice?
Dr. Ma practices at 1275 York Avenue, New York, NY 10065. Dr. Ma's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. Dmand AI also links Dr. Ma to 4 medical groups.
What is Dr. Karen J. Ma's medical license number?
Dr. Ma holds New York license 297439.
Which hospitals is Dr. Karen J. Ma affiliated with?
Dr. Ma practices at Memorial Sloan Kettering Cancer Center in New York, New York.
What medical group is Dr. Karen J. Ma part of?
Dr. Ma is linked to Memorial Medical Consultation Group. Dmand AI links Dr. Ma to 4 more medical groups.
Does Dr. Karen J. Ma accept Medicare?
Yes. CMS data shows Dr. Ma billed Medicare for 104 services in 2024, and Dr. Ma accepts Medicare assignment.
What is Dr. Karen J. Ma's MIPS score?
Dr. Ma's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Karen J. Ma see?
CMS counts 118 Medicare patients who saw Dr. Ma in 2024, with an average age of 75.
What services does Dr. Karen J. Ma bill to Medicare?
In 2024, Dr. Ma's most billed Medicare services were hospital inpatient care (99223) and hospital inpatient care (99222).
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Where did Dr. Karen J. Ma go to medical school?
Dr. Ma graduated from Columbia University College of Physicians and Surgeons in 2016.
What drugs does Dr. Karen J. Ma prescribe most?
In 2019 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Lisinopril, Atorvastatin Calcium and Metformin HCl.
How long has Dr. Karen J. Ma been practicing?
Dr. Ma graduated from medical school in 2016, 10 years ago.
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