DR. DENNIS AVERY WILLIAMS DO
NPI 1841206364
Anesthesiology in Tahlequah, OK
About Dr. Dennis Avery Williams Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DENNIS AVERY WILLIAMS DO (NPI 1841206364) is an individual anesthesiology provider in Tahlequah, Oklahoma, licensed in Oklahoma (4141) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Ascension St John Medical Center, and is a graduate of University Of North Texas Hsc, College Of Osteopathic Med (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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 and accepts Medicare assignment
Dr. Dennis Avery Williams Do 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
3Medicare enrollment records show Dennis Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Jenks, OK 74037
- Reassigned Medicare billing, Oklahoma enrollment
- 199 clinicians in this Medicare group
Arlington, TX 76006
- Reassigned Medicare billing, Oklahoma enrollment
- 144 clinicians in this Medicare group
Fort Worth, TX 76109
- Reassigned Medicare billing, Oklahoma enrollment
- 315 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.
Ascension St John Medical Center
Acute Care Hospitals · Tulsa, OKMedicare 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.
TAHLEQUAH, OK 74464
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 Dennis Williams's NPI number?
The NPI number for Dennis Williams is 1841206364. It was assigned to this individual provider in the NPPES registry on August 1, 2006.
Where is Dennis Williams located?
Dennis Williams practices at 1400 E Downing St, Tahlequah, OK 74464. The listed phone number is (918) 456-0641.
What is Dennis Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Dennis Williams enrolled in Medicare?
Yes. Dennis 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 Dennis Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Williams reassigns Medicare benefits to 3 organizations: Integral Anesthesia, LLC (Jenks, OK), Northstar Anesthesia Of Oklahoma, PLLC (Arlington, TX) and Emergenchealth PLLC (Fort Worth, TX). 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 Dennis Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dennis Williams accept?
Health plans from Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Dennis Williams 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 Dennis Williams affiliated with any hospitals?
According to CMS data, Dennis Williams is affiliated with Ascension St John Medical Center.
When was this NPI record last updated?
The NPPES record for Dennis Williams was last updated on December 9, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Dennis Avery Williams, DO · NPI 1841206364
Anesthesiology physician in Tahlequah, Oklahoma. Individual provider, active in the CMS NPPES registry since August 1, 2006.
## Identity
- **NPI:** 1841206364 (Entity type: Individual)
- **Enumerated:** August 1, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 4141 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 E DOWNING ST, Tahlequah, OK 74464-3324
- **Phone:** (918) 456-0641
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Integral Anesthesia, LLC (NPI 1881041515, Jenks, OK); Northstar Anesthesia Of Oklahoma, PLLC (NPI 1043516628, Arlington, TX); Emergenchealth PLLC (NPI 1467970897, Fort Worth, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of North Texas Hsc, College Of Osteopathic Med, class of 2002
## Record status
- **NPPES last updated:** December 9, 2019
- **Other identifiers:** Medicaid 200089720A (OK)
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Source: [NPI Profile](https://npiprofile.com/npi/1841206364) · Data from the CMS NPPES public registry.