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Radiation Oncology

Glenn B. Mieszkalski, MD

Works at hospitals in Beaufort, SC · Hanover, PA · York, PA … · South Carolina, Pennsylvania

Summary

Dr. Glenn B. Mieszkalski, MD is a radiation oncologist at 122 Okatie Ctr Blvd N, Suite 130, Okatie, SC 29909. Phone: (843) 522-7800. Accepts Medicare assignment. In 2024, Glenn B. Mieszkalski had 167 Original Medicare patients and 4,346 services. NPI 1043325657. 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: Radiation oncologist (Medicare lists Radiation Oncology)
  • Address: 122 Okatie Ctr Blvd N, Suite 130, Okatie, SC 29909 · Directions (10 more locations)
  • Phone: (843) 522‑7800
  • Medicare: Accepts Medicare assignment
  • Hospitals: Beaufort County Memorial Hospital, UPMC Hanover, UPMC Memorial and 2 more
  • Group practice: Pinnacle Health Medical Services (+2 more)
  • Medical school: graduated 1990 (36 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Glenn B. Mieszkalski, 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 Glenn B. Mieszkalski accept Medicare assignment?
Yes. Medicare's clinician data says Glenn B. Mieszkalski 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 Glenn B. Mieszkalski see?
In 2024, CMS data shows 167 Original Medicare patients and 4,346 services for Glenn B. Mieszkalski. This counts Original Medicare only and measures volume, not quality.
What is Glenn B. Mieszkalski's NPI number?
1043325657. 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 Glenn B. Mieszkalski, 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 patients167
Services billed to Medicare4,346
Different services or procedures32
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Ct guidance for insertion of radiation therapy fields (77014)634 services
  2. Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)350 services
  3. Radiation treatment management, 5 treatment sessions (77427)209 services
  4. Calculation of radiation therapy dose (77300)126 services
  5. Design and construction of complex radiation treatment device (77334)120 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%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
  • Arthritis38%
  • Ischemic heart disease31%
  • Diabetes29%

Hospitals where Glenn B. Mieszkalski works

Medicare's Facility Affiliation Data lists Glenn B. Mieszkalski 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.

  • Beaufort County Memorial HospitalBeaufort, SC · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 420067
  • UPMC HanoverHanover, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390233
  • UPMC MemorialYork, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390101
  • UPMC Pinnacle HospitalsHarrisburg, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390067
  • WellSpan York HospitalYork, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390046

Practice locations

Addresses where Glenn B. Mieszkalski is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 11; the Medicare profile lists all.

Group practices

Medicare enrollment lists Glenn B. Mieszkalski as a member of these groups (CMS data updated October 2, 2026).

  • Pinnacle Health Medical Services1,019 clinicians in the group
  • Beaufort County Memorial Hospital194 clinicians in the group
  • The Centers for Advanced Urology LLP145 clinicians in the group

Specialties

Find other Radiation Oncology doctors in South Carolina →

Other radiation oncologists in South Carolina

Clinicians with the same Medicare primary specialty in South Carolina — not a recommendation.

All radiation oncologists in South Carolina →

Other clinicians in Pinnacle Health Medical Services

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

Clinician information

CredentialMD
Graduation year1990 (36 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1043325657
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