Erik K. Loken

Medicare activity in 2024

Official CMS public-use data for Erik K. Loken, 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. Injection, gadobutrol, 0.1 ml (A9585)2,792 services
2. Mri scan of brain before and after contrast (70553)468 services
3. Ct scan head or brain without contrast (70450)288 services
4. Mri scan of brain without contrast (70551)136 services
5. Ct scan of soft tissue of neck with contrast (70491)104 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 blood pressure74%
• High cholesterol74%
• Arthritis51%
• Anxiety35%
• Depression31%
• Ischemic heart disease30%

Hospitals where Erik K. Loken works

Medicare's Facility Affiliation Data lists Erik K. Loken 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 Faulkner HospitalJamaica Plain, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220119
• Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
• Massachusetts General HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220071
• South Shore HospitalSouth Weymouth, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220100

Practice locations

Addresses where Erik K. Loken is enrolled with Medicare (CMS data updated October 2, 2026).

• 1153 Centre StJamaica Plain, MA 02130 (617) 983‑7000
• 75 Francis StBoston, MA 02115 (617) 732‑5500

Group practices

Medicare enrollment lists Erik K. Loken as a member of this group (CMS data updated October 2, 2026).

• Brigham and Womens Physicians Organization Inc2,994 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in Massachusetts →

Other radiologists in Jamaica Plain

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

• Baxter T. Williams, MD
• Suzanne G. Pender, MD
• Jeffrey Shyu, MD
• Marcela Marsiglia, MD
• Stephanie Chung, MD
• Alex Jacobson, MD
• Johnathon Stephens, MD
• William E. Palmer, MD

All radiologists in Jamaica Plain →

Other clinicians in Brigham and Womens Physicians Organization Inc

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

• Larisa E. Connors, MD
• Bradley M. Wertheim, MD
• Joshua A. Lea, CNA
• Michael A. Kelleher, MD
• Karen S. Jiang, MD
• Danielle J. Carroll, 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