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Infectious Disease

Joseph F. John Jr., MD

Works at hospitals in Charleston, SC · South Carolina

Summary

Dr. Joseph F. John Jr., MD is an infectious disease doctor at 1938 Charlie Hall Blvd, Unit B, Charleston, SC 29414. Phone: (843) 402-0227. Accepts Medicare assignment. In 2024, Joseph F. John Jr. had 70 Original Medicare patients and 694 services. NPI 1598866592. 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: Infectious disease doctor (Medicare lists Infectious Disease)
  • Address: 1938 Charlie Hall Blvd, Unit B, Charleston, SC 29414 · Directions (1 more location)
  • Phone: (843) 402‑0227
  • Medicare: Accepts Medicare assignment
  • Hospital: Trident Medical Center
  • Group practice: Lowcountry Infectious Diseases PA
  • Medical school: Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University · graduated 1970 (56 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Joseph F. John Jr., 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 Joseph F. John Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Joseph F. John 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 Joseph F. John Jr. see?
In 2024, CMS data shows 70 Original Medicare patients and 694 services for Joseph F. John Jr.. This counts Original Medicare only and measures volume, not quality.
What is Joseph F. John Jr.'s NPI number?
1598866592. 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 Joseph F. John 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 patients70
Services billed to Medicare694
Different services or procedures19
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)45 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)26 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)22 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)19 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%
  • Arthritis60%
  • Anxiety54%
  • Depression46%
  • COPD36%

Hospitals where Joseph F. John Jr. works

Medicare's Facility Affiliation Data lists Joseph F. John 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.

Practice locations

Addresses where Joseph F. John Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Joseph F. John Jr. as a member of this group (CMS data updated October 2, 2026).

  • Lowcountry Infectious Diseases PA14 clinicians in the group

Specialties

Find other Infectious Disease doctors in South Carolina →

Other infectious disease doctors in Charleston

Clinicians with the same Medicare primary specialty in Charleston, SC — not a recommendation.

All infectious disease doctors in Charleston →

Other clinicians in Lowcountry Infectious Diseases PA

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

Clinician information

CredentialMD
Medical schoolClvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University
Graduation year1970 (56 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1598866592
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