Gregg R. Sobeck, MD

Medicare activity in 2024

Official CMS public-use data for Gregg R. Sobeck, 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)77 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)67 services
3. X-ray of knee, 3 views (73562)62 services
4. Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)61 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)40 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%
• Diabetes42%
• Ischemic heart disease31%
• Osteoporosis29%

Hospitals where Gregg R. Sobeck works

Medicare's Facility Affiliation Data lists Gregg R. Sobeck 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.

• Palmdale Regional Medical CenterPalmdale, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050204

Practice locations

Addresses where Gregg R. Sobeck is enrolled with Medicare (CMS data updated October 2, 2026).

• 38660 Medical Ctr DrPalmdale, CA 93551
• 4955 Van Nuys Blvd, Suite 615Sherman Oaks, CA 91403

Group practices

Medicare enrollment lists Gregg R. Sobeck as a member of this group (CMS data updated October 2, 2026).

• Domenick J Sisto M D Inc10 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in Palmdale

Clinicians with the same Medicare primary specialty in Palmdale, CA — not a recommendation.

• Daniel D. Lee, MD
• Aneet S. Toor, MD
• Richard E. Nussbaum, MD
• Mohamed Z. Lameer, MD
• Alireza K. Nazemi, MD
• Domenick J. Sisto, MD
• John J. Kayvanfar, MD
• Jonathan D. Botts, MD

All orthopedic surgeons in Palmdale →

Other clinicians in Domenick J Sisto M D Inc

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

• Shrey M. Kanjiya, MD
• Richard E. Nussbaum, MD
• Robert E. Henry, MD
• Mark A. Cooper Jr., PA
• Jonathan D. Botts, MD
• Kathy Dao, PA

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