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Diagnostic Radiology

John D. Grizzard, MD

Works at hospitals in Richmond, VA · Tappahannock, VA · Virginia

Summary

Dr. John D. Grizzard, MD is a radiologist at 1001 E Leigh St, Richmond, VA 23298. Phone: (804) 828-7929. Accepts Medicare assignment. In 2024, John D. Grizzard had 1,009 Original Medicare patients and 1,263 services. NPI 1629172861. 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 John D. Grizzard, 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 John D. Grizzard accept Medicare assignment?
Yes. Medicare's clinician data says John D. Grizzard 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 John D. Grizzard see?
In 2024, CMS data shows 1,009 Original Medicare patients and 1,263 services for John D. Grizzard. This counts Original Medicare only and measures volume, not quality.
What is John D. Grizzard's NPI number?
1629172861. 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 John D. Grizzard, 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 patients1,009
Services billed to Medicare1,263
Different services or procedures13
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. X-ray of chest, 1 view (71045)568 services
  2. X-ray of chest, 2 views (71046)210 services
  3. Ct scan of chest with contrast (71260)195 services
  4. Ct scan of chest without contrast (71250)166 services
  5. Ct scan of blood vessels of chest with contrast (71275)72 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%
  • Arthritis58%
  • Ischemic heart disease49%
  • Diabetes40%
  • Heart failure39%

Hospitals where John D. Grizzard works

Medicare's Facility Affiliation Data lists John D. Grizzard 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 John D. Grizzard is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

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

  • MCV Associated Physicians1,807 clinicians in the group

Specialties

Find other Diagnostic Radiology doctors in Virginia →

Other radiologists in Richmond

Clinicians with the same Medicare primary specialty in Richmond, VA — not a recommendation.

All radiologists in Richmond →

Other clinicians in MCV Associated Physicians

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

Clinician information

CredentialMD
Medical schoolVirginia Commonwealth University, School Of Medicine
Graduation year1979 (47 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1629172861
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