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Rheumatology

Mary M. Hagerty, MD

Works at hospitals in Petersburg, WV · Romney, WV · Keyser, WV … · West Virginia, Virginia

Summary

Dr. Mary M. Hagerty, MD is a rheumatologist at 420 W Jubal Early Dr, Suite 104, Winchester, VA 22601. Phone: (540) 667-6232. Accepts Medicare assignment. In 2024, Mary M. Hagerty had 413 Original Medicare patients and 122,254 services. NPI 1942279195. 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 Mary M. Hagerty, 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 Mary M. Hagerty accept Medicare assignment?
Yes. Medicare's clinician data says Mary M. Hagerty 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 Mary M. Hagerty see?
In 2024, CMS data shows 413 Original Medicare patients and 122,254 services for Mary M. Hagerty. This counts Original Medicare only and measures volume, not quality.
What is Mary M. Hagerty's NPI number?
1942279195. 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 Mary M. Hagerty, 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 patients413
Services billed to Medicare122,254
Different services or procedures64
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Injection, golimumab, 1 mg, for intravenous use (J1602)25,600 services
  2. Injection, tocilizumab, 1 mg (J3262)21,360 services
  3. Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (J0129)13,875 services
  4. Injection, denosumab, 1 mg (J0897)10,500 services
  5. Injection, methylprednisolone acetate, 1 mg (J1010)6,418 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%
  • Osteoporosis54%
  • Chronic kidney disease32%
  • Depression28%

Hospitals where Mary M. Hagerty works

Medicare's Facility Affiliation Data lists Mary M. Hagerty 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.

  • Grant Memorial HospitalPetersburg, WV · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 511316
  • Hampshire Memorial HospitalRomney, WV · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 511311
  • Potomac Valley HospitalKeyser, WV · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 511315
  • Shenandoah Memorial HospitalWoodstock, VA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 491305
  • Winchester Medical CenterWinchester, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490005

Practice locations

Addresses where Mary M. Hagerty is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Rheumatology doctors in Virginia →

Other rheumatologists in Virginia

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

All rheumatologists in Virginia →

Clinician information

CredentialMD
Medical schoolRush Medical College Of Rush University
Graduation year1982 (44 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1942279195
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