Lauren C. Mercer, MD

Medicare activity in 2024

Official CMS public-use data for Lauren C. Mercer, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)672 services
2. Psychotherapy with evaluation and management visit, 30 minutes (90833)624 services
3. Psychotherapy, 45 minutes (90834)235 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)130 services
5. Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes (99348)38 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%
• Depression75%
• Anxiety75%
• Arthritis55%
• Alzheimer's disease or dementia35%

Hospitals where Lauren C. Mercer works

Medicare's Facility Affiliation Data lists Lauren C. Mercer 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 Lauren C. Mercer is enrolled with Medicare (CMS data updated October 2, 2026).

• 60 Washington Ave, Suite 203Hamden, CT 06518 (203) 288‑0414

Group practices

Medicare enrollment lists Lauren C. Mercer as a member of this group (CMS data updated October 2, 2026).

• Geriatric and Adult Psychiatry, LLC2 clinicians in the group

Specialties

• Psychiatryprimary

Find other Psychiatry doctors in Connecticut →

Other psychiatrists in Hamden

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

• Oluwole O. Jegede, MD
• Michael B. Vollmar, MD
• Alice G. Papsun, MD
• Enrique Tello, MD
• Farhad Montazeri-Lemraski, MD

All psychiatrists in Hamden →

Other clinicians in Geriatric and Adult Psychiatry, LLC

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

• Alan P. Siegal, 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