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Dermatology

Julia A. Siegel, MD

Works at hospitals in Boston, MA · Massachusetts

Summary

Dr. Julia A. Siegel, MD is a dermatologist at 30 Lancaster St, Suite 400, Boston, MA 02114. Phone: (617) 722-4100. Accepts Medicare assignment. In 2024, Julia A. Siegel had 681 Original Medicare patients and 4,458 services. NPI 1528599651. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Dermatologist (Medicare lists Dermatology)
  • Address: 30 Lancaster St, Suite 400, Boston, MA 02114 · Directions
  • Phone: (617) 722‑4100
  • Medicare: Accepts Medicare assignment
  • Hospital: Massachusetts General Hospital
  • Group practice: Boston Dermatology and Laser Center LLC
  • Medical school: University Of Massachusetts Medical School · graduated 2017 (9 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Julia A. Siegel, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Julia A. Siegel accept Medicare assignment?
Yes. Medicare's clinician data says Julia A. Siegel accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Julia A. Siegel see?
In 2024, CMS data shows 681 Original Medicare patients and 4,458 services for Julia A. Siegel. This counts Original Medicare only and measures volume, not quality.
What is Julia A. Siegel's NPI number?
1528599651. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Julia A. Siegel, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients681
Services billed to Medicare4,458
Different services or procedures38
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Destruction of precancer skin growth, 2-14 growths (17003)1,833 services
  2. Destruction of precancer skin growth, 1 growth (17000)584 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)565 services
  4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)459 services
  5. Biopsy of related skin growth, first growth (11102)301 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol69%
  • High blood pressure62%
  • Arthritis42%
  • Osteoporosis23%
  • Ischemic heart disease22%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)22%

Hospitals where Julia A. Siegel works

Medicare's Facility Affiliation Data lists Julia A. Siegel at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Julia A. Siegel is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Julia A. Siegel as a member of this group (CMS data updated October 2, 2026).

  • Boston Dermatology and Laser Center LLC5 clinicians in the group

Specialties

Find other Dermatology doctors in Massachusetts →

Other dermatologists in Boston

Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.

All dermatologists in Boston →

Other clinicians in Boston Dermatology and Laser Center LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Massachusetts Medical School
Graduation year2017 (9 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1528599651
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians