ALISON YITING OU OD
NPI 1144054297
Optometrist in Baltimore, MD
About Alison Yiting Ou Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALISON YITING OU OD (NPI 1144054297) is an individual optometrist in Baltimore, Maryland, licensed in Maryland (TA3146) and active in the NPI registry since August 2024. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Bayview Medical Center, and maintains a secondary practice location in Chicago.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Alison Yiting Ou Od is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Alison Ou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- 4,483 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins Bayview Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21224 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
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 Alison Ou's NPI number?
The NPI number for Alison Ou is 1144054297. It was assigned to this individual provider in the NPPES registry on August 30, 2024.
Where is Alison Ou located?
Alison Ou practices at 4940 Eastern Ave, Baltimore, MD 21224. The listed phone number is (410) 550-5568.
What is Alison Ou's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Alison Ou enrolled in Medicare?
Yes. Alison Ou is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Alison Ou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alison Ou reassigns Medicare benefits to Johns Hopkins University (Baltimore, 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 Alison Ou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alison Ou accept?
Health plans from Oscar Health, Oscar Health Insurance, Oscar Health Maintenance Organization of Florida, Oscar Health Plan of North Carolina, Inc and Oscar Health Plan, Inc. and 3 other insurers list Alison Ou as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Alison Ou affiliated with any hospitals?
According to CMS data, Alison Ou is affiliated with Johns Hopkins Bayview Medical Center.
When was this NPI record last updated?
The NPPES record for Alison Ou was last updated on July 9, 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.
# Alison Yiting Ou, OD · NPI 1144054297
Optometrist provider in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since August 30, 2024.
## Identity
- **NPI:** 1144054297 (Entity type: Individual)
- **Enumerated:** August 30, 2024
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** TA3146 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 4940 EASTERN AVE, Baltimore, MD 21224-2735
- **Phone:** (410) 550-5568
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Johns Hopkins University (NPI 1275515546, Baltimore, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Illinois College Of Optometry At Chicago, class of 2020
## Record status
- **NPPES last updated:** July 9, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1144054297) · Data from the CMS NPPES public registry.