Quick answers
- Does Shannon O. McCallie accept Medicare assignment?
- Yes. Medicare's clinician data says Shannon O. McCallie 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 Shannon O. McCallie see?
- In 2024, CMS data shows 212 Original Medicare patients and 4,162 services for Shannon O. McCallie. This counts Original Medicare only and measures volume, not quality.
- What is Shannon O. McCallie's NPI number?
- 1740275031. 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 Shannon O. McCallie, 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 | 212 |
|---|---|
| Services billed to Medicare | 4,162 |
| Different services or procedures | 87 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)361 services
- Insertion of needle into vein for collection of blood sample (36415)346 services
- Blood test, comprehensive group of blood chemicals (80053)282 services
- Blood test, lipids (cholesterol and triglycerides) (80061)245 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)217 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%
- Arthritis55%
- Anxiety33%
- Ischemic heart disease29%
- Diabetes25%
Hospitals where Shannon O. McCallie works
Medicare's Facility Affiliation Data lists Shannon O. McCallie 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.
- Erlanger Medical CenterChattanooga, TN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 440104
- Memorial Healthcare System, IncChattanooga, TN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 440091
- Parkridge Medical CenterChattanooga, TN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 440156
Practice locations
Addresses where Shannon O. McCallie is enrolled with Medicare (CMS data updated October 2, 2026).
- 1651 Gunbarrel RdChattanooga, TN 37421
- 4976 Alpha LnHixson, TN 37343 (423) 308‑0280
- 4980 Alpha LnHixson, TN 37343 (423) 870‑2450
- 9309 Apison PikeOoltewah, TN 37363 (423) 551‑3562
Group practices
Medicare enrollment lists Shannon O. McCallie as a member of this group (CMS data updated October 2, 2026).
- Galen Medical Group, PC125 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Chattanooga
Clinicians with the same Medicare primary specialty in Chattanooga, TN — not a recommendation.
Other clinicians in Galen Medical Group, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Tennessee, Hsc, College Of Medicine |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740275031 |
| 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