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Neurosurgery

Jean M. Voyadzis, MD

Works at hospitals in Prince Frederick, MD · Washington, DC · Leonardtown, MD · Maryland, District of Columbia

Summary

Dr. Jean M. Voyadzis, MD is a neurosurgeon at 1145 19th St NW, 311 Mmg at 19th Street NW, Washington, DC 20036. Phone: (202) 429-2401. Accepts Medicare assignment. In 2024, Jean M. Voyadzis had 613 Original Medicare patients and 1,749 services. NPI 1104961010. 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 Jean M. Voyadzis, 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 Jean M. Voyadzis accept Medicare assignment?
Yes. Medicare's clinician data says Jean M. Voyadzis 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 Jean M. Voyadzis see?
In 2024, CMS data shows 613 Original Medicare patients and 1,749 services for Jean M. Voyadzis. This counts Original Medicare only and measures volume, not quality.
What is Jean M. Voyadzis's NPI number?
1104961010. 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 Jean M. Voyadzis, 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 patients613
Services billed to Medicare1,749
Different services or procedures94
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)209 services
  2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)179 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)166 services
  4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)120 services
  5. Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)109 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%
  • Diabetes37%
  • Ischemic heart disease33%
  • Anxiety25%

Hospitals where Jean M. Voyadzis works

Medicare's Facility Affiliation Data lists Jean M. Voyadzis 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 Jean M. Voyadzis is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists Jean M. Voyadzis as a member of these groups (CMS data updated October 2, 2026).

  • MedStar Medical Group II LLC3,767 clinicians in the group
  • Suburban/Nrh Medical Rehabilitation Inc941 clinicians in the group

Specialties

Find other Neurosurgery doctors in District of Columbia →

Other neurosurgeons in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

All neurosurgeons in Washington →

Other clinicians in MedStar Medical Group II LLC

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

Clinician information

CredentialMD
Medical schoolGeorgetown University School Of Medicine
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1104961010
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