Loren Greenberg, MD

Medicare activity in 2024

Official CMS public-use data for Loren Greenberg, 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. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)100 services
2. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)75 services
3. Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)67 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)60 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)53 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 pressure75%
• High cholesterol75%
• Arthritis67%
• Alzheimer's disease or dementia61%
• Anxiety50%
• Depression47%

Hospitals where Loren Greenberg works

Medicare's Facility Affiliation Data lists Loren Greenberg 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.

• Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070022

Practice locations

Addresses where Loren Greenberg is enrolled with Medicare (CMS data updated October 2, 2026).

• 1354 Chapel StNew Haven, CT 06511 (203) 867‑8300
• 20 York StNew Haven, CT 06510 (203) 688‑1378

Group practices

Medicare enrollment lists Loren Greenberg as a member of this group (CMS data updated October 2, 2026).

• Northeast Medical Group Inc1,360 clinicians in the group

Specialties

• Geriatric Medicineprimary

Find other Geriatric Medicine doctors in Connecticut →

Other geriatricians in New Haven

Clinicians with the same Medicare primary specialty in New Haven, CT — not a recommendation.

• Brienne Miner, MD
• Margaret Xu
• Andrew B. Cohen, MD
• Gerard J. Kerins, MD
• Terri R. Fried, MD
• Natalia K. Festa, MD
• Thomas M. Gill, MD
• Kimberly Glerum

All geriatricians in New Haven →

Other clinicians in Northeast Medical Group Inc

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

• Sean A. Lynch, PA
• Michelle A. Cox
• Lana I. Bernstein, MD
• Gina Williams, MD
• Jon C. Gaudio, MD
• Jaclyn S. Milano, PA

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