Joel Lester Koslow, M.D.
Internal Medicine Physician · Alexandria, VA
Joel Lester Koslow, M.D. is an internal medicine physician with a practice address in Alexandria, Virginia, and NPI 1063479186, issued on May 1, 2006. Check the license (Virginia 0101020388, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Joel Lester Koslow
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 0101020388 VA
Self-reported in NPPES; status is on the state search - Practice location
- 6355 Walker LN, Alexandria, VA 22310
- Phone
- (703) 971-0505
- Enumerated
- May 1, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (703) 971-0508
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
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Verify Joel Lester Koslow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101020388Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
48 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Alendronate Sodium13 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.
Joel Lester Koslow among 3,599 internal medicine physician records in Virginia
Joel Lester Koslow, M.D. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2026 · 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).
148 internal medicine physician records list a practice address in Alexandria
They are 148 of the 5,424 NPPES records with a practice address in Alexandria, and 3,599 internal medicine physician records in Virginia.
All 3,599 in Virginia → Every provider in Alexandria → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Eyerusalem Akpan, M.D.Alexandria, VA 223101063974061
- Lauren HamptonAlexandria, VA 223101295356368
- Julie Kroviak, MDAlexandria, VA 223101679671325
- John McConnell, M.D.Alexandria, VA 223101437418118
- Christina Michael, D.O.Alexandria, VA 223101053369058
- Foster Montalbano, M.D.Alexandria, VA 223101568574101
- Manny Silis, MDAlexandria, VA 223101407932635
- George Silis, MDAlexandria, VA 223101003977422
Common questions
What is Joel Lester Koslow, M.D.'s NPI number?
Joel Lester Koslow, M.D.'s National Provider Identifier (NPI) is 1063479186, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joel Lester Koslow, M.D. located?
The NPPES record lists a practice address at 6355 Walker LN, Alexandria, VA, 22310. Phone: (703) 971-0505. Providers update this record themselves, so call before visiting.
How can I verify Joel Lester Koslow, M.D.'s license?
NPPES lists Virginia license number 0101020388, 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 Joel Lester Koslow, M.D. prescribe under Medicare Part D?
In 2024, Joel Lester Koslow, M.D. had 48 Medicare Part D claims; 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.