Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jill Rebecca Slater-Freedberg, MD

Individual provider Dermatology Physician · NPI 1255389425

Jill Rebecca Slater-Freedberg, MD practises Dermatology in Lexington, Massachusetts. Graduated from Tufts University School of Medicine in 1988, 38 years ago. Practices with Lexington-Waltham Dermatology Group Inc, a 4-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
38
Trained at
Tufts University School of Medicine
Licensed in
MA
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

57 Bedford Street Lexington Waltham Dermatology
Lexington, MA 02420-4500
Phone: (781) 862-2322
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 77571 (MA)

Record details

NPI number1255389425
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Lexington-Waltham Dermatology Group Inc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 394 times · 84th percentile
Skin biopsy 65 times · 71st percentile
Removal or shaving of skin growth 11 times · 65th percentile
Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients394
Services billed 1,226 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.

Colleagues at Lexington-Waltham Dermatology Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4 clinicians in the practice; 2 are shown here.

Other providers in Lexington