TAMMY LYNN WILLIAMS APRN, FNP-C
NPI 1720526437
Nurse Practitioner - Family in Oklahoma City, OK
About Tammy Lynn Williams Aprn, Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY LYNN WILLIAMS APRN, FNP-C (NPI 1720526437) is an individual family provider in Oklahoma City, Oklahoma, licensed in Oklahoma (0083947) and active in the NPI registry since February 2017. She is enrolled in Medicare PECOS, maintains 5 additional practice locations, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 5
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
Tammy Lynn Williams Aprn, Fnp-c 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 Tammy Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73106
- Reassigned Medicare billing, Oklahoma enrollment
- 2 clinicians in this Medicare group
Tulsa, OK 74146
- Reassigned Medicare billing, Oklahoma enrollment
- 43 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 73127 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.
OKLAHOMA CITY, OK 73127
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 Tammy Williams's NPI number?
The NPI number for Tammy Williams is 1720526437. It was assigned to this individual provider in the NPPES registry on February 2, 2017.
Where is Tammy Williams located?
Tammy Williams practices at 4629 NW 23rd St, Oklahoma City, OK 73127. The listed phone number is (405) 251-8880.
What is Tammy Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Tammy Williams enrolled in Medicare?
Yes. Tammy 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 Tammy Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Williams reassigns Medicare benefits to 2 organizations: Valir Hospice Care, LLC (Oklahoma City, OK) and Archwell Health Professional Services Of Oklahoma, LLC (Tulsa, OK). 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 Tammy 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 Tammy Williams was last updated on September 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Tammy Lynn Williams, APRN, FNP-C · NPI 1720526437
Family physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since February 2, 2017.
## Identity
- **NPI:** 1720526437 (Entity type: Individual)
- **Enumerated:** February 2, 2017
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 0083947 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 4629 NW 23RD ST, Oklahoma City, OK 73127-2103
- **Phone:** (405) 251-8880
## 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): Valir Hospice Care, LLC (NPI 1871685503, Oklahoma City, OK); Archwell Health Professional Services Of Oklahoma, LLC (NPI 1457934895, Tulsa, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** September 25, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1720526437) · Data from the CMS NPPES public registry.