MARK WILLIAMS PNHNP-BC
NPI 1639847049
Nurse Practitioner - Psychiatric/Mental Health in Reno, NV
About Mark Williams Pnhnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK WILLIAMS PNHNP-BC (NPI 1639847049) is an individual psychiatric/mental health provider in Reno, Nevada, licensed in Nevada (836585) and active in the NPI registry since August 2021. He is enrolled in Medicare PECOS, is affiliated with Renown Regional Medical Center, and maintains a secondary practice location in Reno.
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 and accepts Medicare assignment
Mark Williams Pnhnp-bc 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
4Medicare enrollment records show Mark Williams reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Reno, NV 89502
- Reassigned Medicare billing, Nevada enrollment
- 735 clinicians in this Medicare group
Reno, NV 89502
- Reassigned Medicare billing, Nevada enrollment
- Medicare enrollment name: Medtrans Behavioral Nevada Casal PLLC
- 65 clinicians in this Medicare group
Las Vegas, NV 89103
- Reassigned Medicare billing, Nevada enrollment
- 33 clinicians in this Medicare group
Henderson, NV 89052
- Reassigned Medicare billing, Nevada enrollment
- 157 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 2
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.
Renown Regional Medical Center
Acute Care Hospitals · Reno, NVPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 89502 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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.
RENO, NV 89502
RENO, NV 89502
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 Mark Williams's NPI number?
The NPI number for Mark Williams is 1639847049. It was assigned to this individual provider in the NPPES registry on August 31, 2021.
Where is Mark Williams located?
Mark Williams practices at 1155 Mill St, Reno, NV 89502. The listed phone number is (775) 982-2860.
What is Mark Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Mark Williams enrolled in Medicare?
Yes. Mark Williams 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 Mark Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Williams reassigns Medicare benefits to 4 organizations: Community Care Services LLC (Reno, NV), Medtrans Reno Casal, PLLC (Reno, NV), Alliance Mental Health Specialists Suba Park Cheng PLLC (Las Vegas, NV) and Behavioral Health Solutions LLC (Henderson, NV). 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 Mark Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mark Williams affiliated with any hospitals?
According to CMS data, Mark Williams is affiliated with Renown Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Mark Williams was last updated on July 9, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mark Williams, PNHNP-BC · NPI 1639847049
Psychiatric/Mental Health physician in Reno, Nevada. Individual provider, active in the CMS NPPES registry since August 31, 2021.
## Identity
- **NPI:** 1639847049 (Entity type: Individual)
- **Enumerated:** August 31, 2021
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** 836585 (Nevada)
- **Sole proprietor:** No
## Practice location
- **Address:** 1155 MILL ST, Reno, NV 89502-1576
- **Phone:** (775) 982-2860
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Community Care Services LLC (NPI 1053272989, Reno, NV); Medtrans Reno Casal, PLLC (NPI 1790236180, Reno, NV); Alliance Mental Health Specialists Suba Park Cheng PLLC (NPI 1275988107, Las Vegas, NV); Behavioral Health Solutions LLC (NPI 1902412802, Henderson, NV) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** July 9, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1639847049) · Data from the CMS NPPES public registry.