Timothy David Muir, MD
Internal Medicine Physician · Falls Church, VA
Timothy David Muir, MD is an internal medicine physician with a practice address in Falls Church, Virginia, and NPI 1518012806, issued on Jan 24, 2007. Check the license (Virginia 0101226093, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Timothy David Muir
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 0101226093 VA
Self-reported in NPPES; status is on the state search - Practice location
- 500 W Annandale RD, Falls Church, VA 22046
- Phone
- (703) 521-6662
- Enumerated
- Jan 24, 2007
- Record last updated
- Feb 13, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (703) 521-5991
- Medicare enrollment
- Enrolled (PECOS I20120120000438); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
Also registered at 500 W Annandale RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gordon Addo, FNP-CFamily Nurse Practitioner1124597661
- Ritu Cuttica, DOInternal Medicine Physician1942239942
- Ashtaad Dalal, MDSleep Medicine (Family Medicine) Physician1184067522
- Helen Evans, MDFamily Medicine Physician1245855360
- Lars FarberPhysician Assistant1932667359
- Jay Kaufman, M.D.Sleep Medicine (Internal Medicine) Physician1801868880
Verify Timothy David Muir in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101226093Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average internal medicine physician in 2024
4,999 Medicare Part D claims for 461 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 70 claims were for opioids.
Most prescribed
- Atorvastatin Calcium555 claims
- Losartan Potassium266 claims
- Levothyroxine Sodium236 claims
- Amlodipine Besylate205 claims
- Tamsulosin Hcl166 claims
- Lisinopril159 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Privia Medical Group, LLCArlington, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy David Muir among 3,599 internal medicine physician records in Virginia
Timothy David Muir, MD is one of 3,599 internal medicine physician records with a practice address in Virginia. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 45% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1997 · median 2003 among the 2,234 with a school on file
- Record last updated2014 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
181 internal medicine physician records list a practice address in Falls Church
They are 181 of the 3,991 NPPES records with a practice address in Falls Church, and 3,599 internal medicine physician records in Virginia.
All 3,599 in Virginia → Every provider in Falls Church → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Masud Baksh, M.D.Falls Church, VA 220461992774202
- Leigh Boldt, MDFalls Church, VA 220461841368198
- Rajendra Borkar, M.D.Falls Church, VA 220461740345222
- Ritu Cuttica, DOFalls Church, VA 220461942239942
- Michelle De Netto, MDFalis Church, VA 220461013078872
- Susan Deren, M.D.Falls Church, VA 220461588713192
- Daniella Hines, M.D.Falls Church, VA 220461619088911
- Donna Lee, MDFalls Church, VA 220461750468344
Common questions
What is Timothy David Muir, MD's NPI number?
Timothy David Muir, MD's National Provider Identifier (NPI) is 1518012806, issued on Jan 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Timothy David Muir, MD located?
The NPPES record lists a practice address at 500 W Annandale RD, Falls Church, VA, 22046. Phone: (703) 521-6662. Providers update this record themselves, so call before visiting.
How can I verify Timothy David Muir, MD's license?
NPPES lists Virginia license number 0101226093, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy David Muir, MD prescribe under Medicare Part D?
In 2024, Timothy David Muir, MD had 4,999 Medicare Part D claims for 461 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.