Phillip T. Guillen, MD

Medicare activity in 2024

Official CMS public-use data for Phillip T. Guillen, 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. Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)165 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)144 services
3. Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose (J7324)109 services
4. Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)87 services
5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)39 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%
• Arthritis75%
• Ischemic heart disease41%
• Diabetes32%
• Anxiety32%

Hospitals where Phillip T. Guillen works

Medicare's Facility Affiliation Data lists Phillip T. Guillen 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.

• John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330185
• Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330393

Practice locations

Addresses where Phillip T. Guillen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1175 Montauk Hwy, Suite 3West Islip, NY 11795

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in New York →

Other orthopedic surgeons in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

• James L. Marzec, MD
• John Lee, MD
• Timothy J. Mulry, DO
• Mohammad Athar, MD
• Jeffrey M. Spivak
• Everett S. Weiss, MD
• Carl B. Paulino, MD
• Michael R. Hausman, MD

All orthopedic surgeons in New York →

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