Spencer J. Knox, MD

Medicare activity in 2024

Official CMS public-use data for Spencer J. Knox, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)241 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)194 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)125 services
4. Biopsy of large bowel using a flexible endoscope (45380)89 services
5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)82 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%
• Arthritis56%
• Ischemic heart disease42%
• Diabetes40%
• Chronic kidney disease40%

Hospitals where Spencer J. Knox works

Medicare's Facility Affiliation Data lists Spencer J. Knox 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.

• Ascension St Vincent's Clay CountyMiddleburg, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100321
• Baptist Health Medical Center - JacksonvilleJacksonville, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100088

Practice locations

Addresses where Spencer J. Knox is enrolled with Medicare (CMS data updated October 2, 2026).

• 1747 Baptist Clay Dr, Suite 300Fleming Island, FL 32003 (904) 214‑8100

Group practices

Medicare enrollment lists Spencer J. Knox as a member of this group (CMS data updated October 2, 2026).

• Borland Groover Clinic, PA130 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Florida →

Other gastroenterologists in Fleming Island

Clinicians with the same Medicare primary specialty in Fleming Island, FL — not a recommendation.

• Michael E. Herman, DO
• Peter Senada, MD
• Sian S. Chisholm, MD
• Vikas J. Patel, MD

All gastroenterologists in Fleming Island →

Other clinicians in Borland Groover Clinic, PA

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

• Raychel L. Raymer, PA
• Juan C. Munoz, MD
• Buffie M. Reid, MD
• Andrew R. Brown, MD
• Mark Fleisher, MD
• Robert M. Aportela, 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