Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Jonathan David Lowenthal, MD

Individual provider Internal Medicine Physician · NPI 1861553711

Dr. Jonathan David Lowenthal, MD practises Internal Medicine in Prince Frederick, Maryland. Graduated from University of Maryland School of Medicine in 1982, 44 years ago. Practices with Calvert Internal Medicine Group, PA, a 40-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
44
Trained at
University of Maryland School of Medicine
Licensed in
MD
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

985 Prince Frederick Blvd Ste 201
Prince Frederick, MD 20678-3492
Phone: (410) 535-2005
Fax: (410) 535-4850
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D33123 (MD)

Record details

NPI number1861553711
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 13, 2006
Last updated in NPPESJuly 21, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Calvert Internal Medicine Group, Pa — 40 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients758
Services billed 12,193 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Calvert Internal Medicine Group, PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 40 clinicians in the practice; 12 are shown here.

Other providers in Prince Frederick