Daniel Alexander Leffler, MD
Gastroenterology Internal Medicine
Daniel Alexander Leffler is a Gastroenterology Internal Medicine specialist based in Boston, MA with over 24 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
Patients across MA can see Daniel Alexander Leffler, MD in person in Boston or via virtual visit — no travel required. With 24+ years of experience, he has been practicing in the Boston area. CMS Medicare data shows his patients commonly have osteoporosis, high cholesterol, and anxiety.
Older · 5522dNPPES updated 2011-04-13 · verify NPI on CMS · Verify license at Massachusetts Board of Registration in Medicine
How Does This Doctor Compare?
Generic Rx
↑ Higher = better55.9%
Massachusetts avg: 81.9 · US avg: 82.8
⚠ Lower than most doctors nationally(-26.9 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
26
Unique beneficiaries
Boutique practicePrescription Recipients
18
Patients prescribed
Prescriptions Written
68
Total claims
Total Medicare drug cost: $48k
Percentile rankings compared against 1,606 reporting peers in Massachusetts.
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 Osteoporosis, High Cholesterol, and Anxiety Disorders.
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+47%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-12%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↑ More patients than average (+12%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-28%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
24 years in practice
Experienced
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Mailing address
330 Brookline Ave, Boston, MA 02215-5400
Differs from practice location
Virtual Internal Medicine Care With Daniel Alexander Leffler
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Daniel Alexander Leffler for follow-up consultations, cholesterol management, anxiety counseling — no travel to Boston 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 Daniel Alexander Leffler
Dr. Leffler is listed as active in the NPI registry with telehealth listed in Boston, MA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (617) 667-2136.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Daniel Alexander Leffler
Practice Location
330 Brookline Ave Dana 501, Boston, MA 02215-5400
Mailing Address
330 Brookline Ave, Boston, MA 02215-5400
This is a provider directory. Contact the office directly to schedule appointments.
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