DR. MARGARET JOHNSTON O.D.
NPI 1164442653
Optometrist - Corneal and Contact Management in Alexandria, VA
About Dr. Margaret Johnston O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET JOHNSTON O.D. (NPI 1164442653) is an individual corneal and contact management provider in Alexandria, Virginia, licensed in Virginia (0618000176) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Margaret Johnston O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Margaret Johnston reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bethesda, MD 20889
- Reassigned Medicare billing, District of Columbia enrollment
- Medicare enrollment name: Family Optometric Associates PC
- 8 clinicians in this Medicare group
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 22314 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Margaret Johnston's NPI number?
The NPI number for Margaret Johnston is 1164442653. It was assigned to this individual provider in the NPPES registry on July 20, 2006. The provider is also known as Dr. Margaret A. Placentra O.D..
Where is Margaret Johnston located?
Margaret Johnston practices at 113 North Washington St, Alexandria, VA 22314. The listed phone number is (703) 549-5454.
What is Margaret Johnston's specialty?
The primary specialty registered for this NPI is Optometrist, specializing in Corneal and Contact Management, with taxonomy code 152WC0802X.
Is Margaret Johnston enrolled in Medicare?
Yes. Margaret Johnston is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Margaret Johnston's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Johnston reassigns Medicare benefits to Family Optometric Associates P.C. (Bethesda, MD). The 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 Margaret Johnston'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 Margaret Johnston was last updated on June 19, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.
# Dr. Margaret Johnston, O.D. · NPI 1164442653
Corneal and Contact Management provider in Alexandria, Virginia. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1164442653 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Optometrist - Corneal and Contact Management · taxonomy 152WC0802X
- **State license:** 0618000176 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 113 NORTH WASHINGTON ST, Alexandria, VA 22314
- **Phone:** (703) 549-5454
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Family Optometric Associates P.C. (NPI 1629197520, Bethesda, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 19, 2014
- **Other identifiers:** Medicare ID-Type Unspecified J412603 (VA); Medicare UPIN T31174 (VA)
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Source: [NPI Profile](https://npiprofile.com/npi/1164442653) · Data from the CMS NPPES public registry.