Ayse N. Sahin-Efe, MD

Medicare activity in 2024

Official CMS public-use data for Ayse N. Sahin-Efe, 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.

Most frequent services

1. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)60 services
2. Fine needle aspiration biopsy using ultrasound guidance, first growth (10005)54 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)33 services
4. Fine needle aspiration biopsy using ultrasound guidance, each additional growth (10006)11 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 cholesterol75%
• High blood pressure71%
• Arthritis53%
• Anxiety30%
• Osteoporosis30%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)30%

Hospitals where Ayse N. Sahin-Efe works

Medicare's Facility Affiliation Data lists Ayse N. Sahin-Efe 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.

• Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
• Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220101

Practice locations

Addresses where Ayse N. Sahin-Efe is enrolled with Medicare (CMS data updated October 2, 2026).

• 2000 Washington St, Green Bldg Suite 563Newton, MA 02462 (617) 219‑1285

Group practices

Medicare enrollment lists Ayse N. Sahin-Efe as a member of this group (CMS data updated October 2, 2026).

• Mass General Brigham Medical Group Suburban Massachusetts Inc602 clinicians in the group

Specialties

• Endocrinologyprimary

Find other Endocrinology doctors in Massachusetts →

Other endocrinologists in Newton

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

• Florencia Halperin, MD
• Isabelle Zamfirescu
• Jeanne H. Steppel Reznik, MD
• Eric Nou, MD
• Devina L. Willard, MD
• Karen W. Choong, MD
• John T. Larossa, MD
• Heather L. Elias, MD

All endocrinologists in Newton →

Other clinicians in Mass General Brigham Medical Group Suburban Massachusetts Inc

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

• Jessica A. Zaks, MD
• Rafael A. Altieri, MD
• Erin M. Tullock, CNM
• Samjhana Basnyat, MD
• Melissa A. Wendt, MD
• Ariadne R. Mueller, MD

Clinician information

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