CRYSTAL WILLIAMS
NPI 1477026045
Nurse Practitioner - Psychiatric/Mental Health in Columbia, MD
About Crystal Williams NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CRYSTAL WILLIAMS (NPI 1477026045) is an individual psychiatric/mental health provider in Columbia, Maryland, licensed in Maryland (R234872) and active in the NPI registry since January 2019. She is enrolled in Medicare PECOS and maintains a secondary practice location in Baltimore.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Crystal Williams is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Crystal Williams reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Columbia, MD 21045
- Reassigned Medicare billing, Maryland enrollment
- 8 clinicians in this Medicare group
Columbia, MD 21045
- Reassigned Medicare billing, Maryland enrollment
- 6 clinicians in this Medicare group
Glen Burnie, MD 21061
- Reassigned Medicare billing, Maryland enrollment
- 87 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Shock Trauma Associates PA
- 541 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21045 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
COLUMBIA, MD 21045
COLUMBIA, MD 21045
COLUMBIA, MD 21045
COLUMBIA, MD 21045
COLUMBIA, MD 21045
COLUMBIA, MD 21045
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 Crystal Williams's NPI number?
The NPI number for Crystal Williams is 1477026045. It was assigned to this individual provider in the NPPES registry on January 7, 2019.
Where is Crystal Williams located?
Crystal Williams practices at 8890 Mcgaw Rd Ste 350-360, Columbia, MD 21045. The listed phone number is (301) 317-6575.
What is Crystal Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Crystal Williams enrolled in Medicare?
Yes. Crystal Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Crystal Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Crystal Williams reassigns Medicare benefits to 4 organizations: Joshi & Merchant, MD,pa (Columbia, MD), Joshi Mental Health And Wellness LLC (Columbia, MD), Umms Ambulatory Care LLC (Glen Burnie, MD) and Shock Trauma Associates, P.A. (Baltimore, 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 Crystal Williams'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 Crystal Williams was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Crystal Williams · NPI 1477026045
Psychiatric/Mental Health physician in Columbia, Maryland. Individual provider, active in the CMS NPPES registry since January 7, 2019.
## Identity
- **NPI:** 1477026045 (Entity type: Individual)
- **Enumerated:** January 7, 2019
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** R234872 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 8890 MCGAW RD STE 350-360, Columbia, MD 21045-4743
- **Phone:** (301) 317-6575
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Joshi & Merchant, MD,pa (NPI 1609811447, Columbia, MD); Joshi Mental Health And Wellness LLC (NPI 1669391108, Columbia, MD); Umms Ambulatory Care LLC (NPI 1801651674, Glen Burnie, MD); Shock Trauma Associates, P.A. (NPI 1679512909, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1477026045) · Data from the CMS NPPES public registry.