Timothy Muir, MD
NPI 1518012806 · Internal Medicine Physician · Falls Church, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Muir, MD is a Internal Medicine Physician provider in Falls Church, VA (NPI 1518012806).
Provider details
- NPI number
- 1518012806
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101226093 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,963 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 530 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 520 | $140 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 470 | $143 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 469 | $100 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 358 | $18 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 83 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 555 | 162 |
| Losartan Potassium | 266 | 78 |
| Levothyroxine Sodium | 236 | 59 |
| Amlodipine Besylate | 205 | 64 |
| Tamsulosin Hcl | 166 | 43 |
| Lisinopril | 159 | 39 |
| Simvastatin | 151 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-24
- Last updated
- 2014-02-13
Frequently asked questions
- What is Timothy Muir's NPI number?
- Timothy Muir's National Provider Identifier (NPI) is 1518012806, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Muir's specialty?
- Timothy Muir is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Muir located?
- Timothy Muir's practice location on file with NPPES is 500 W Annandale Rd, Falls Church, VA 22046-4205.
- What is Timothy Muir's phone number?
- The practice phone number listed in the NPPES registry for Timothy Muir is (703) 521-6662.
- Does Timothy Muir accept Medicare?
- Timothy Muir is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Muir's NPI active?
- Yes — Timothy Muir's NPI (1518012806) is active in the NPPES registry as of the last update on 2014-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.