Diana A. Roth O'Brien, MD

Medicare activity in 2024

Official CMS public-use data for Diana A. Roth O'Brien, 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. Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)1,532 services
2. Calculation of radiation therapy dose (77300)482 services
3. Design and construction of complex radiation treatment device (77334)302 services
4. Radiation treatment management, 5 treatment sessions (77427)271 services
5. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)144 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 cholesterol75%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure74%
• Arthritis47%
• Anxiety31%
• Ischemic heart disease30%

Practice locations

Addresses where Diana A. Roth O'Brien is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 1101 Hempstead TpkeUniondale, NY 11553 (516) 559‑1000
• 1275 York AveNew York, NY 10065 (212) 639‑2000
• 136 Mountainview BlvdBasking Ridge, NJ 07920 (908) 542‑3000
• 225 Summit AveMontvale, NJ 07645 (908) 542‑3336
• 480 Red Hill RdMiddletown, NJ 07748 (908) 542‑3007

Group practices

Medicare enrollment lists Diana A. Roth O'Brien as a member of these groups (CMS data updated October 2, 2026).

• MSK Monmouth295 clinicians in the group
• MSK Bergen255 clinicians in the group
• Memorial Sloan Kettering Cancer Center at Basking Ridge New Jersey229 clinicians in the group
• Memorial Radiation Oncology Group92 clinicians in the group

Specialties

• Radiation Oncologyprimary

Find other Radiation Oncology doctors in New York →

Other radiation oncologists in Uniondale

Clinicians with the same Medicare primary specialty in Uniondale, NY — not a recommendation.

• Abraham J. Wu, MD
• Zeinab Abou Yehia, MD
• Beryl McCormick, MD
• Sean M. McBride, MD
• Gustav Y. Cederquist, MD
• Irini Yacoub, MD
• Jennifer Ma, MD
• Kaled M. Alektiar, MD

All radiation oncologists in Uniondale →

Other clinicians in MSK Monmouth

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

• Sarah Eskreis-Winkler, MD
• David M. Guttmann, MD
• Christopher A. Barker, MD
• Abraham J. Wu, MD
• Chenyang Zhan, MD
• Gregory S. Fernandez, 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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
4. Medicare Care Compare — official Medicare tool to look up clinicians