Matthew Williams, MD
NPI 1629084918 · Critical Care Medicine (Internal Medicine) Physician · Annandale, VA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Williams, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Annandale, VA (NPI 1629084918).
Provider details
- NPI number
- 1629084918
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101058124 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,001 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Test to Measure Expiratory Airflow and Volume94010 | 1,096 | $31 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 706 | $141 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 307 | $198 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 216 | $101 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 141 | $84 |
| Test to Determine Lung Volumes Using Sensors94726 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 373 | 173 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 311 | 81 |
| Prednisone | 272 | 122 |
| Ipratropium Bromide | 248 | 107 |
| Azithromycin | 191 | 80 |
| Montelukast Sodium | 138 | 44 |
| Fluticasone/Vilanterolbrand: Breo Ellipta |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$29,557 across 54 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3300 Gallows RdFalls Church, VA 22042-3307Phone: (703) 776-4001Fax: (703) 776-7113
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2022-07-28
- Certified
- 2022-07-28
Frequently asked questions
- What is Matthew Williams's NPI number?
- Matthew Williams's National Provider Identifier (NPI) is 1629084918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Williams's specialty?
- Matthew Williams is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Williams located?
- Matthew Williams's practice location on file with NPPES is 3289 Woodburn Road, Annandale, VA 22003.
- What is Matthew Williams's phone number?
- The practice phone number listed in the NPPES registry for Matthew Williams is (703) 641-8616.
- Does Matthew Williams accept Medicare?
- Matthew Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Williams's NPI active?
- Yes — Matthew Williams's NPI (1629084918) is active in the NPPES registry as of the last update on 2022-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.