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General Surgery

Jonas L. Karlsson

Works at hospitals in Clyde, NC · Asheville, NC · Hendersonville, NC · North Carolina

Summary

Jonas L. Karlsson is a general surgeon at 509 Biltmore Ave, Asheville, NC 28801. Phone: (828) 213-2325. Accepts Medicare assignment. In 2024, Jonas L. Karlsson had 133 Original Medicare patients and 226 services. NPI 1225231038. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Jonas L. Karlsson, 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 Jonas L. Karlsson accept Medicare assignment?
Yes. Medicare's clinician data says Jonas L. Karlsson 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 Jonas L. Karlsson see?
In 2024, CMS data shows 133 Original Medicare patients and 226 services for Jonas L. Karlsson. This counts Original Medicare only and measures volume, not quality.
What is Jonas L. Karlsson's NPI number?
1225231038. 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 Jonas L. Karlsson, 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 patients133
Services billed to Medicare226
Different services or procedures28
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)47 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)39 services
  3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)36 services
  4. Hospital discharge day management, 30 minutes or less (99238)17 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%
  • Arthritis59%
  • Anxiety51%
  • Depression45%
  • Atrial fibrillation38%

Hospitals where Jonas L. Karlsson works

Medicare's Facility Affiliation Data lists Jonas L. Karlsson 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 Jonas L. Karlsson is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Jonas L. Karlsson as a member of this group (CMS data updated October 2, 2026).

  • Mission Health Community Multispecialty Providers LLC601 clinicians in the group

Specialties

Find other General Surgery doctors in North Carolina →

Other general surgeons in Asheville

Clinicians with the same Medicare primary specialty in Asheville, NC — not a recommendation.

All general surgeons in Asheville →

Other clinicians in Mission Health Community Multispecialty Providers LLC

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

Clinician information

Graduation year2007 (19 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1225231038
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