Leah Orta Nieves, MD

Medicare activity in 2024

Official CMS public-use data for Leah Orta Nieves, 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, denosumab, 1 mg (J0897)1,800 services
2. Calculation of trabecular bone score (tbs) using imaging data with interpretation and report on fracture risk (77089)168 services
3. Dxa bone density measurement of hip, pelvis, spine (77080)117 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)58 services
5. Injection of drug or substance under skin or into muscle (96372)50 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 cholesterol70%
• Osteoporosis67%
• High blood pressure54%
• Arthritis47%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)22%
• Ischemic heart disease20%

Hospitals where Leah Orta Nieves works

Medicare's Facility Affiliation Data lists Leah Orta Nieves 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.

• MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004

Practice locations

Addresses where Leah Orta Nieves is enrolled with Medicare (CMS data updated October 2, 2026).

• 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000

Group practices

Medicare enrollment lists Leah Orta Nieves as a member of this group (CMS data updated October 2, 2026).

• MedStar Medical Group II LLC3,767 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in District of Columbia →

Other OB-GYNs in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

• Thaddeus Mamienski, MD
• Bailey Cannon Dean, MD
• Wakako Horiuchi, MD
• Amy C. Lee, MD
• Nichole A. Pardo, MD
• Robert Gutman, MD
• Gloria J. Bowles Johnson, MD
• Michelle A. Sutherland, MD

All OB-GYNs in Washington →

Other clinicians in MedStar Medical Group II LLC

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

• Andrew Radu, MD
• Fnu Vivien, MD
• Lakshmi Krishnan, MD
• Tori M. Dauphinais, NP
• Danielle M. McCamey, NP
• Asha G. Potti, 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