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Orthopedic Surgery

Robert P. Lonergan Iii, MD

Works at hospitals in Bartlett, TN · Tennessee

Summary

Dr. Robert P. Lonergan Iii, MD is an orthopedic surgeon at 13690 Hwy 51 S, Suite 104, Atoka, TN 38004. Phone: (901) 641-3000. Accepts Medicare assignment. In 2024, Robert P. Lonergan Iii had 354 Original Medicare patients and 7,448 services. NPI 1972579605. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Orthopedic surgeon (Medicare lists Orthopedic Surgery)
  • Address: 13690 Hwy 51 S, Suite 104, Atoka, TN 38004 · Directions (2 more locations)
  • Phone: (901) 641‑3000
  • Medicare: Accepts Medicare assignment
  • Hospital: Saint Francis Bartlett Medical Center
  • Group practice: MSK Group PC
  • Medical school: University Of Virginia School Of Medicine · graduated 1995 (31 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Robert P. Lonergan Iii, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Robert P. Lonergan Iii accept Medicare assignment?
Yes. Medicare's clinician data says Robert P. Lonergan Iii 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 Robert P. Lonergan Iii see?
In 2024, CMS data shows 354 Original Medicare patients and 7,448 services for Robert P. Lonergan Iii. This counts Original Medicare only and measures volume, not quality.
What is Robert P. Lonergan Iii's NPI number?
1972579605. 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 Robert P. Lonergan Iii, 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 patients354
Services billed to Medicare7,448
Different services or procedures77
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Injection, methylprednisolone acetate, 1 mg (J1010)5,560 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)369 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)345 services
  4. Aspiration and/or injection of fluid from large joint (20610)201 services
  5. X-ray of shoulder, minimum of 2 views (73030)174 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%
  • Ischemic heart disease31%
  • Diabetes30%
  • Anxiety27%

Hospitals where Robert P. Lonergan Iii works

Medicare's Facility Affiliation Data lists Robert P. Lonergan Iii 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.

Practice locations

Addresses where Robert P. Lonergan Iii is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Robert P. Lonergan Iii as a member of this group (CMS data updated October 2, 2026).

  • MSK Group PC142 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Tennessee →

Other orthopedic surgeons in Atoka

Clinicians with the same Medicare primary specialty in Atoka, TN — not a recommendation.

All orthopedic surgeons in Atoka →

Other clinicians in MSK Group PC

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

Clinician information

CredentialMD
Medical schoolUniversity Of Virginia School Of Medicine
Graduation year1995 (31 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1972579605
CorrectionsReport 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

  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