Quick answers
- Does Larry D. Neff Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Larry D. Neff Jr. 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 Larry D. Neff Jr. see?
- In 2024, CMS data shows 645 Original Medicare patients and 7,166 services for Larry D. Neff Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Larry D. Neff Jr.'s NPI number?
- 1598792582. 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 Larry D. Neff Jr., 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 | 645 |
|---|---|
| Services billed to Medicare | 7,166 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)3,362 services
- Hyaluronan or derivative, durolane, for intra-articular injection, 1 mg (J7318)1,140 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)420 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)253 services
- Aspiration and/or injection of fluid from large joint (20610)207 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%
- Arthritis75%
- High cholesterol74%
- Diabetes28%
- Ischemic heart disease25%
- Chronic kidney disease25%
Hospitals where Larry D. Neff Jr. works
Medicare's Facility Affiliation Data lists Larry D. Neff Jr. 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.
- Mercy Hospital CarthageCarthage, MO · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 261338
- Mercy Hospital ColumbusColumbus, KS · Critical Access Hospital · Emergency services: listed by Medicare · CCN 171308
- Mercy Hospital JoplinJoplin, MO · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 260001
- Mercy Specialty Hospital Southeast KansasGalena, KS · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 170203
Practice locations
Addresses where Larry D. Neff Jr. is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 100 Mercy WayJoplin, MO 64804
- 1619, K66Galena, KS 66739 (417) 781‑4404
- 1717 S Range Line Rd BJoplin, MO 64804
- 220 N Pennsylvania AveColumbus, KS 66725
- 3125 Dr Russell Smith WayCarthage, MO 64836
Group practices
Medicare enrollment lists Larry D. Neff Jr. as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Joplin LLC295 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Joplin
Clinicians with the same Medicare primary specialty in Joplin, MO — not a recommendation.
Other clinicians in Mercy Clinic Joplin LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598792582 |
| 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