Mary B. Morrissey, MD

Medicare activity in 2024

Official CMS public-use data for Mary B. Morrissey, 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. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)134 services
2. Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)117 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)50 services
4. Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina (76830)33 services
5. 3d radiographic procedure (76376)25 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 cholesterol68%
• High blood pressure46%
• Arthritis44%
• Osteoporosis27%
• Anxiety23%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)14%

Hospitals where Mary B. Morrissey works

Medicare's Facility Affiliation Data lists Mary B. Morrissey 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.

• White Plains Hospital CenterWhite Plains, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330304

Practice locations

Addresses where Mary B. Morrissey is enrolled with Medicare (CMS data updated October 2, 2026).

• 5 Perryridge RdGreenwich, CT 06830 (203) 863‑3000
• 73 Market StYonkers, NY 10710 (914) 682‑0700

Group practices

Medicare enrollment lists Mary B. Morrissey as a member of this group (CMS data updated October 2, 2026).

• Westchester Medical Group, P.C415 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Connecticut →

Other OB-GYNs in Greenwich

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

• Lealani Rodriguez, MD
• Beth J. Simon
• Judith Rivas, MD
• Caterina Violi, MD
• Michelle Wallenstein, MD
• Mary G. Diana, MD

All OB-GYNs in Greenwich →

Other clinicians in Westchester Medical Group, P.C

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

• Maria Dynkin, MD
• Yonatan J. Hillman, MD
• Briar L. Dent, MD
• Victoria B. Coon, NP
• Kristina Feldman, OD
• Steven Y. Warren, 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