Catherine Y. Tannahill, MD

Medicare activity in 2024

Official CMS public-use data for Catherine Y. Tannahill, 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)191 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)141 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)74 services
4. X-ray of upper spine, 4-5 views (72050)64 services
5. X-ray of lower and sacral spine, minimum of 4 views (72110)57 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%
• Anxiety40%
• Chronic kidney disease35%

Hospitals where Catherine Y. Tannahill works

Medicare's Facility Affiliation Data lists Catherine Y. Tannahill 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.

• McLeod Health CherawCheraw, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420107
• McLeod Regional Medical Center-Pee DeeFlorence, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420051

Practice locations

Addresses where Catherine Y. Tannahill is enrolled with Medicare (CMS data updated October 2, 2026).

• 1204 E Cheves StFlorence, SC 29506 (843) 673‑0122
• 555 E Cheves StFlorence, SC 29506 (843) 777‑7000
• 800 E Cheves StFlorence, SC 29506

Group practices

Medicare enrollment lists Catherine Y. Tannahill as a member of this group (CMS data updated October 2, 2026).

• McLeod Physician Associates II550 clinicians in the group

Specialties

• Neurosurgeryprimary

Find other Neurosurgery doctors in South Carolina →

Other neurosurgeons in Florence

Clinicians with the same Medicare primary specialty in Florence, SC — not a recommendation.

• Nnenna Mbabuike, MD
• Miranda K. Hayworth, MD
• William B. Naso
• Ward C. Worthington Iii, MD
• Frances A. Hardaway, MD
• Matthew Brown, MD
• Thomas K. Hines, MD
• Andrew H. Rhea, MD

All neurosurgeons in Florence →

Other clinicians in McLeod Physician Associates II

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

• Justin H. Crosby
• Adam R. Pattyn, DO
• Pamela M. Hooks
• Edward M. Kowal, MD
• Douglas A. Macpherson, MD
• Teresa G. Dietz, NP

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