Catherine Sibyl Diefenbach, M.D.
Catherine Sibyl Diefenbach is a Hematology & Oncology specialist based in New York, NY with over 25 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Catherine Sibyl Diefenbach, M.D. has been part of the New York medical community since 2008 in independent practice. Trained at Perelman School of Med at the University of Pennsylvania (class of 2001), she has been practicing for over 25 years. Among her Medicare patients, common conditions include hypertension, high cholesterol, and arthritis (per CMS data). CMS MIPS quality score: 84.47/100 (2023).
At a glance
- Federal MIPS score higher than 24% of MIPS-scored doctors in New York
- Virtual visits available — no app or travel required
Older · 6324dNPPES updated 2009-01-28 · verify NPI on CMS · Verify license at New York State Board for Medicine
Contact & Location
Practice Location
160 E 34th St Nyu Langone Clinical Cancer Center, New York, NY 10016-4744
How Does This Doctor Compare?
MIPS Score
202384.47/100
New York avg: 87 · US avg: 83.6
✓ Higher than most doctors nationally(+0.9 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Medicare Patients
118
Unique beneficiaries
Standard volumePercentile rankings compared against 8,064 reporting peers in New York.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+2%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-6%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+6%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-2%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%Chronic Obstructive Pulmonary Disease — a group of lung diseases that block airflow
US avg: 20.4%↑ More patients than average (+9%) — a focus area for this doctor
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+8%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$11.9k received from industry
15 transactions reported in 2024 ·High tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Catherine Sibyl Diefenbach's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2001
Perelman School of Medicine at the University of Pennsylvania
25 years in practice
Experienced
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Taxonomy: 207RH0003X
Education & Training
Perelman School of Med at the University of Pennsylvania (Class of 2001)
Mailing address
210 Riverside Dr Apt. 6g, New York, NY 10025-6802
Differs from practice location
Virtual Hematology & Oncology Care With Catherine Sibyl Diefenbach
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Catherine Sibyl Diefenbach for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to New York required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Catherine Sibyl Diefenbach
Dr. Diefenbach is listed as active in the NPI registry with telehealth listed in New York, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (212) 731-5670.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Catherine Sibyl Diefenbach
Practice Location
160 E 34th St Nyu Langone Clinical Cancer Center, New York, NY 10016-4744
Mailing Address
210 Riverside Dr Apt. 6g, New York, NY 10025-6802
This is a provider directory. Contact the office directly to schedule appointments.
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