Dr. Catherine Handy Marshall, MD
- Medicare services, 2024
- 1,742
- Medicare patients, 2024
- 281
- Part D claims, 2024
- 458
- MIPS score, 2024
- 83
- Hospital affiliations
- 3
- Practice address
- 600 N Wolfe St, Baltimore, MD 21287
- Practice phone
- Call (855) 662-3017
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Hospital Nelson/Harvey Building
Baltimore, Maryland
Find Dr. Marshall's professional email, personal email and mobile number
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Dr. Catherine Handy Marshall is a medical oncologist in Baltimore, Maryland
Dr. Marshall practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
Dr. Marshall's NPI, 1134443948, was assigned on March 23, 2010. Dr. Marshall graduated from Johns Hopkins University School of Medicine in 2012. Dr. Marshall holds Maryland license D0080261.
- NPI
- 1134443948NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355590290
- NPI enumeration date
- March 23, 2010
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (855) 662-3017
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Catherine Handy Marshall practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland
Dr. Marshall's primary practice is Johns Hopkins Hospital Nelson/Harvey Building, at 600 N Wolfe St, Baltimore, MD 21287 in Baltimore City. The practice phone is (855) 662-3017.
- Johns Hopkins Hospital Nelson/Harvey Building600 N Wolfe St, Baltimore, MD 21287 · Baltimore CityPhone(855) 662-3017
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Catherine Handy Marshall is affiliated with 6 sites of care and 2 medical groups
Dr. Marshall's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dr. Marshall is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Marshall to 2 more hospitals, 2 group practices and clinics 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 Dr. Catherine Handy Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Hospital Nelson/Harvey Building | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine Handy Marshall is one of 157 medical oncologists in Maryland
Medical oncology is Dr. Marshall's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Marshall is licensed in Maryland.
Specialties and state licenses
- Medical oncology, MarylandPrimary
Medical oncologists near Dr. Marshall
Counts of medical 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. Catherine Handy Marshall billed Medicare for 1,742 services in 2024
CMS data shows 1,742 Medicare services from Dr. Marshall across 10 procedure codes in 2024, for 281 Medicare patients. Medicare paid $168,447 for them.
Dr. Marshall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 6392024: 6756%
- Office and hospital visits
- 2023: 3932024: 66268%
- Tests and treatments
- 2023: 2012024: 2104%
- Other services
- 2023: 02024: 195
Where Dr. Marshall's Medicare services took place, 2024
- In an office1,25172%
- In a facility49128%
Dr. Marshall compared with the Maryland median for medical oncologists, 2024
- Dr. Marshall
- Maryland median
- Medicare services
- 1,742vs 4224.1 times
- Medicare patients
- 281vs 14397% above
- Part D claims
- 386vs 1183.3 times
Medians across 124 medical oncologists in Maryland with Dmand AI profiles that report each measure.
Dr. Marshall'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall and other medical oncologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Catherine Handy Marshall treated 281 Medicare patients in 2024, average age 75
CMS counts 281 Medicare patients who saw Dr. Marshall in 2024. The largest group is 65 to 74, with 123 patients. 75% of them have cancer, and 75% have high blood pressure. 9% are also on Medicaid. Their average risk score is 2.10, 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. Marshall's median patient age at 77, with 4% women.
Dr. Marshall's Medicare patients by age, 2024
Dr. Marshall's Medicare patients by sex, 2024
- Women3011%
- Men25189%
Chronic conditions among Dr. Marshall's Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Ischemic heart disease35%
- Diabetes31%
- Mood disorders27%
- Chronic kidney disease26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marshall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women4%
- Men95%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Catherine Handy Marshall wrote 458 Medicare Part D claims in 2024
In 2024, Dr. Marshall wrote 458 Medicare Part D claims for 76 patients. 77% of them were for generic drugs. CMS names the drug for 386 of them, across 10 drugs with 11 or more claims each, at $999,624 in total drug cost. In 2023, CMS named 344 claims across 7 drugs.
Dr. Marshall's Part D claims by kind of drug, 2024
- Generic353 claims77%
- Brand-name105 claims23%
Dr. Marshall'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. Marshall's Part D claims, 2024
- Opioids3%15 of 458 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: 3442024: 38612%
Drugs named by CMS: 10 in 2024, 7 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
Dr. Catherine Handy Marshall scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Marshall for performance year 2024, reported as part of a group. CMS lists Dr. Marshall as offering telehealth.
- Offers telehealth
- Yes
Dr. Marshall's MIPS scores, performance year 2024
- 83of 100Final score
- 73.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 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. Catherine Handy Marshall received $7,925 in industry payments from 2019 to 2025
CMS Open Payments shows 10 general payments to Dr. Marshall from 4 drug and device companies from 2019 to 2025. Consulting fees make up the largest share, 55% of the total. Pfizer Inc. paid the most, $4,687.
General payments to Dr. Marshall by program year, 2019 to 2025
General payments to Dr. Marshall by kind, 2019 to 2025
- Consulting fees$4,32055%
- Honoraria$2,00025%
- Travel and lodging$1,30716%
- Food and beverage$2553%
- Education$431%
Companies that paid Dr. Marshall the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Catherine Handy Marshall graduated from Johns Hopkins University School of Medicine
Dr. Marshall graduated from Johns Hopkins University School of Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Catherine Handy Marshall'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 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) |
| Industry payments | Open Payments (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. Catherine Handy Marshall
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. Catherine Handy Marshall's NPI number?
Dr. Catherine Handy Marshall's NPI number is 1134443948. It was assigned on March 23, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine Handy Marshall?
Dr. Catherine Handy Marshall is a medical oncologist in Baltimore, Maryland. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. Catherine Handy Marshall practice?
Dr. Marshall practices at 600 N Wolfe St, Baltimore, MD 21287. Dr. Marshall's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dmand AI also links Dr. Marshall to 2 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Catherine Handy Marshall's office phone number?
The practice phone on file for Dr. Marshall is (855) 662-3017.
What is Dr. Catherine Handy Marshall's medical license number?
Dr. Marshall holds Maryland license D0080261.
Which hospitals is Dr. Catherine Handy Marshall affiliated with?
Dr. Marshall is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Marshall to 2 more hospitals.
What medical group is Dr. Catherine Handy Marshall part of?
Dr. Marshall is linked to Johns Hopkins University. Dmand AI links Dr. Marshall to 1 more medical group.
Does Dr. Catherine Handy Marshall accept Medicare?
Yes. CMS data shows Dr. Marshall billed Medicare for 1,742 services in 2024.
Does Dr. Catherine Handy Marshall offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marshall as offering telehealth services.
What is Dr. Catherine Handy Marshall's MIPS score?
Dr. Marshall's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Catherine Handy Marshall see?
CMS counts 281 Medicare patients who saw Dr. Marshall in 2024, with an average age of 75.
What services does Dr. Catherine Handy Marshall bill to Medicare?
In 2024, Dr. Marshall's most billed Medicare services were injected or infused drug (J9217), office visit, established patient (99215) and office visit, established patient (99214).
Where did Dr. Catherine Handy Marshall go to medical school?
Dr. Marshall graduated from Johns Hopkins University School of Medicine in 2012.
What drugs does Dr. Catherine Handy Marshall prescribe most?
In 2024 Medicare Part D data, Dr. Marshall's most prescribed drugs by claims were Abiraterone Acetate, Prednisone and Dexamethasone.
Has Dr. Catherine Handy Marshall received payments from drug or device companies?
CMS Open Payments shows $7,925 in general payments to Dr. Marshall from 4 companies from 2019 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Catherine Handy Marshall been practicing?
Dr. Marshall graduated from medical school in 2012, 14 years ago.
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