Matthew D. Ammerman, MD

Medicare activity in 2024

Official CMS public-use data for Matthew D. Ammerman, 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.

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)152 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)120 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)51 services
4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)41 services
5. Telephone medical discussion with physician, 5-10 minutes (99441)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 cholesterol75%
• Arthritis75%
• High blood pressure70%
• Osteoporosis28%
• Ischemic heart disease27%
• Anxiety21%

Hospitals where Matthew D. Ammerman works

Medicare's Facility Affiliation Data lists Matthew D. Ammerman 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.

• Sibley Memorial HospitalWashington, DC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 090005

Practice locations

Addresses where Matthew D. Ammerman is enrolled with Medicare (CMS data updated October 2, 2026).

• 5215 Loughboro Rd NW, Suite 510Washington, DC 20016

Group practices

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

• Washington Neurosurgical Associates, P. C.3 clinicians in the group

Specialties

• Neurosurgeryprimary

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.

• Mani N. Nair, MD
• Rizwan Tahir, MD
• Michael K. Rosner, MD
• Ehsan Dowlati, MD
• Samir Sur, MD
• Kareem A. Zaghloul, MD
• Damirez Fossett, MD
• Daniel Felbaum, MD

All neurosurgeons in Washington →

Clinician information

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