ERIC JAMES WILLIAMSON CRNP
NPI 1205337540
Nurse Practitioner - Acute Care in Baltimore, MD
About Eric James Williamson Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ERIC JAMES WILLIAMSON CRNP (NPI 1205337540) is an individual acute care provider in Baltimore, Maryland, licensed in Maryland (R201656) and active in the NPI registry since February 2018. He is enrolled in Medicare PECOS, is affiliated with Luminis Health Anne Arundel Medical Center, Inc, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Eric James Williamson Crnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Eric Williamson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21202
- Reassigned Medicare billing, Maryland and District of Columbia enrollments
- Also billed through NPI 1255359972 (District of Columbia)
- 952 clinicians in this Medicare group
Pasadena, MD 21122
- Reassigned Medicare billing, Maryland enrollment
- 794 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.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Luminis Health Anne Arundel Medical Center, Inc
Acute Care Hospitals · Annapolis, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21201 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 21201
BALTIMORE, MD 21201
BALTIMORE, MD 21201
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 Eric Williamson's NPI number?
The NPI number for Eric Williamson is 1205337540. It was assigned to this individual provider in the NPPES registry on February 22, 2018.
Where is Eric Williamson located?
Eric Williamson practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-8667.
What is Eric Williamson's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Eric Williamson enrolled in Medicare?
Yes. Eric Williamson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Eric Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eric Williamson reassigns Medicare benefits to 2 organizations: Johns Hopkins Community Physicians (Baltimore, MD) and Luminis Health Medical Group, LLC (Pasadena, MD). 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 Eric Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Eric Williamson affiliated with any hospitals?
According to CMS data, Eric Williamson is affiliated with Luminis Health Anne Arundel Medical Center, Inc.
When was this NPI record last updated?
The NPPES record for Eric Williamson was last updated on February 22, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Eric James Williamson, CRNP · NPI 1205337540
Acute Care physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since February 22, 2018.
## Identity
- **NPI:** 1205337540 (Entity type: Individual)
- **Enumerated:** February 22, 2018
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** R201656 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 S GREENE ST, Baltimore, MD 21201-1544
- **Phone:** (410) 328-8667
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins Community Physicians (NPI 1013738285, Baltimore, MD); Luminis Health Medical Group, LLC (NPI 1063837490, Pasadena, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** February 22, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1205337540) · Data from the CMS NPPES public registry.