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DR. JOEL LESTER KOSLOW M.D.
NPI 1063479186
Internal Medicine in Alexandria, VA

Active since May 01, 2006PECOS Enrolled
6355 WALKER LN, SUITE 303, ALEXANDRIA, VA 22310(703) 971-0505(703) 971-0508 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Joel Lester Koslow M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOEL LESTER KOSLOW M.D. (NPI 1063479186) is an individual internal medicine provider in Alexandria, Virginia, licensed in Virginia (0101020388) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063479186
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JOEL LESTER KOSLOWCredential: M.D.
Location Address6355 WALKER LN, SUITE 303Alexandria, VA 22310-3245
Mailing Address6355 Walker Ln, Suite 303Alexandria, VA 22310-3245 · (703) 971-0505 · Fax (703) 971-0508
Phone(703) 971-0505
Fax(703) 971-0508
Sole ProprietorNo
Enumeration DateMay 1, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1063479186 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in VA · 0101020388
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
6355 WALKER LN, Alexandria, VA 22310
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Joel Lester Koslow M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Joel Koslow reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inova Health Care Services
7.2 mi
Internal Medicine
3300 GALLOWS RD, PHYSICIAN SERVICES
Falls Church, VA 22042
  • Reassigned Medicare billing, District of Columbia enrollment
  • 2,618 clinicians in this Medicare group
NPI 1952320061 (703) 321-2627
Privia Medical Group, LLC
8.2 mi
Internal Medicine
950 N GLEBE RD STE 700
Arlington, VA 22203
  • Reassigned Medicare billing, District of Columbia and Virginia enrollments
  • 1,534 clinicians in this Medicare group
NPI 1013042480 (571) 366-8850

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22310 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
95%6,431 patients4/55-star benchmark: 99%
Health Information Exchange
The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…
59%393 patients3/55-star benchmark: 88%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
91%701 patients3/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
90%2,602 patients4/55-star benchmark: 97%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
100%2,465 patients5/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
85%2,465 patients4/55-star benchmark: 89%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
72%2,465 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
8 suppliers27 claims82 services$6.65 avg. paid by Medicare
Normal, low and high calibrator solution / chips A4256
DME-Other DME · category DE000N
1 supplier12 claims12 services$2.93 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
5 suppliers17 claims31 services$1.11 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
5 suppliers15 claims90 services$1.74 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
1 supplier11 claims11 services$3.89 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GWEN RENEE MORRIS MOT, OTR/L
Specialist
6355 WALKER LN, SUITE 512
ALEXANDRIA, VA 22310
Fairfax County (703) 647-3110
BESTPRACTICES, INC
Emergency Medicine
6355 WALKER LN
ALEXANDRIA, VA 22310
Fairfax County (703) 776-3111
CHELSEA KEMLAGE
Physical Therapist
6355 WALKER LN, SUITE 204
ALEXANDRIA, VA 22310
Fairfax County (703) 810-5214
MS. JOANNE F CHARLES FNP-C
Family Medicine
6355 WALKER LN, SUITE 310
ALEXANDRIA, VA 22310
Fairfax County (703) 971-8600
LAUREN M DAILEY PA-C
Physician Assistant
6355 WALKER LN, SUITE 401
ALEXANDRIA, VA 22310
Fairfax County (703) 924-2100
DR. EDWARD CHARLES RABBITT M.D.
Orthopaedic Surgery
6355 WALKER LN, SUITE 501
ALEXANDRIA, VA 22310
Fairfax County (703) 765-4321
DR. CHRISTINA STEPHANIE MICHAEL D.O.
Internal Medicine
6355 WALKER LN, SUITE 505
ALEXANDRIA, VA 22310
Fairfax County (703) 971-4444
DR C S MICHAEL LLC
Internal Medicine
6355 WALKER LN, SUITE 505
ALEXANDRIA, VA 22310
Fairfax County (703) 971-4444

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joel Koslow's NPI number?

The NPI number for Joel Koslow is 1063479186. It was assigned to this individual provider in the NPPES registry on May 1, 2006.

Where is Joel Koslow located?

Joel Koslow practices at 6355 Walker Ln Suite 303, Alexandria, VA 22310. The listed phone number is (703) 971-0505.

What is Joel Koslow's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Joel Koslow enrolled in Medicare?

Yes. Joel Koslow is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Joel Koslow's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joel Koslow reassigns Medicare benefits to 2 organizations: Inova Health Care Services (Falls Church, VA) and Privia Medical Group, LLC (Arlington, VA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joel Koslow's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Joel Koslow was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.