Quick answers
- Does David M. Shackelford accept Medicare assignment?
- Yes. Medicare's clinician data says David M. Shackelford accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does David M. Shackelford see?
- In 2024, CMS data shows 1,991 Original Medicare patients and 8,719 services for David M. Shackelford. This counts Original Medicare only and measures volume, not quality.
- What is David M. Shackelford's NPI number?
- 1578541439. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for David M. Shackelford, 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.
| Original Medicare patients | 1,991 |
|---|---|
| Services billed to Medicare | 8,719 |
| Different services or procedures | 150 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,150 services
- Injection, gadobutrol, 0.1 ml (A9585)2,730 services
- X-ray of chest, 1 view (71045)350 services
- Ct scan head or brain without contrast (70450)179 services
- Dxa bone density measurement of hip, pelvis, spine (77080)136 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%
- Arthritis54%
- Diabetes38%
- Anxiety34%
- Chronic kidney disease34%
Hospitals where David M. Shackelford works
Medicare's Facility Affiliation Data lists David M. Shackelford 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.
- Marshall Medical CenterLewisburg, TN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 441309
- Maury Regional HospitalColumbia, TN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 440073
- Peterson Regional Medical CenterKerrville, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450007
- Sanford Bemidji Medical CenterBemidji, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240100
- Sanford Medical Center FargoFargo, ND · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 350011
Practice locations
Addresses where David M. Shackelford is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 103 Jv Mangubat DrWaynesboro, TN 38485 (931) 722‑5411
- 1224 Trotwood AveColumbia, TN 38401 (931) 381‑1111
- 4250 Hospital DrMarianna, FL 32446 (850) 526‑2200
- 5421 Main St, Suite CSpring Hill, TN 37174 (931) 486‑3425
- 575 Hill Country Dr, Suite 101Kerrville, TX 78028 (830) 258‑7090
Group practices
Medicare enrollment lists David M. Shackelford as a member of these groups (CMS data updated October 2, 2026).
- Peterson Medical Associates191 clinicians in the group
- ER Physician Group at Jackson Hospital154 clinicians in the group
- Sanford Clinic57 clinicians in the group
- Southern Radiology Associates PLLC42 clinicians in the group
- Spring Hill Imaging Center, LLC16 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Waynesboro
Clinicians with the same Medicare primary specialty in Waynesboro, TN — not a recommendation.
Other clinicians in Peterson Medical Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578541439 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians