1. Home
  2. Directory
  3. Oklahoma
  4. City
  5. Nurse Anesthetist Certified Registered
  6. NPI Profile

MR. RILEY LEE WILLIAMS
NPI 1639375744
Nurse Anesthetist, Certified Registered in Oklahoma City, OK

Active since June 25, 2007Accepts Medicare Assignment
1000 N LEE AVE, OKLAHOMA CITY, OK 73102(405) 272-7000(405) 272-8451 Get Directions Write a Review

NPPES record last updated: June 10, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mr. Riley Lee Williams NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. RILEY LEE WILLIAMS (NPI 1639375744) is an individual nurse anesthetist, certified registered in Oklahoma City, Oklahoma, licensed in Oklahoma (113820) and active in the NPI registry since June 2007. He is a graduate of Other (2011).

NPPES Registry Identity

NPI1639375744
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameMR. RILEY LEE WILLIAMS
Location Address1000 N LEE AVEOklahoma City, OK 73102-1036
Mailing Address1000 N Lee AveOklahoma City, OK 73102-1036 · (405) 272-7000 · Fax (405) 272-8451
Phone(405) 272-7000
Fax(405) 272-8451
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateJune 25, 2007
Last NPPES UpdateJune 10, 2016
✔ NPI 1639375744 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in OK · 113820
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1000 N LEE AVE, Oklahoma City, OK 73102
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Mending Health, Oscar Health Maintenance Organization of Florida.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

Mr. Riley Lee Williams 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.

PECOS PAC ID7517281678
PECOS Enrollment IDI20220622001704

Medicare Billing Reassignments

11

Medicare enrollment records show Riley Williams reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Quiescence Anesthesia LLC
816 mi
Nurse Anesthetist, Certified Registered
577 MULBERRY ST STE 110
Macon, GA 31201
  • Reassigned Medicare billing, Florida enrollment
  • 142 clinicians in this Medicare group
NPI 1942671805 (888) 728-0882
Fleming Island Anesthesia LLC
991 mi
Anesthesiology
1670 EAGLE HARBOR PKWY
Orange Park, FL 32003
  • Reassigned Medicare billing, Florida enrollment
  • 876 clinicians in this Medicare group
NPI 1487945895 (904) 644-0700
Office Anesthesia Staffing
1,022 mi
Nurse Anesthetist, Certified Registered
901 34TH AVE N UNIT 7266
Saint Petersburg, FL 33734
  • Reassigned Medicare billing, Florida enrollment
  • 122 clinicians in this Medicare group
NPI 1972232023 (727) 203-5114
Anesthesiology Professional Services, Inc.
1,023 mi
Anesthesiology
2333 W HILLSBOROUGH AVE STE 110
Tampa, FL 33603
  • Reassigned Medicare billing, Florida enrollment
  • 160 clinicians in this Medicare group
NPI 1902856891 (813) 569-6500
Anesthesia Services Of Manatee LLC
1,036 mi
Nurse Anesthetist, Certified Registered
5817 21ST AVE W
Bradenton, FL 34209
  • Reassigned Medicare billing, Florida enrollment
  • 40 clinicians in this Medicare group
NPI 1699153064 (941) 794-0379
Florida Anesthesia, LLC
1,036 mi
Anesthesiology
5817 21ST AVE W
Bradenton, FL 34209
  • Reassigned Medicare billing, Florida enrollment
  • 41 clinicians in this Medicare group
NPI 1083179311 (863) 382-0385
Anesthesia Dynamics LLC
1,039 mi
Anesthesiology
206 2ND ST E
Bradenton, FL 34208
  • Reassigned Medicare billing, Florida enrollment
  • 1,887 clinicians in this Medicare group
NPI 1073001012 (888) 851-4642
Aurora Anesthesia LLC
1,052 mi
Anesthesiology
6050 CATTLERIDGE BLVD
Sarasota, FL 34232
  • Reassigned Medicare billing, Florida enrollment
  • 48 clinicians in this Medicare group
NPI 1770336299 (516) 458-5128
Red Reef Anesthesia Inc
1,160 mi
Anesthesiology
9075 S FEDERAL HWY
Port St Lucie, FL 34952
  • Reassigned Medicare billing, Florida enrollment
  • 43 clinicians in this Medicare group
NPI 1851169775 (772) 398-9898
Quantum Anesthesia Services PA
1,204 mi
Anesthesiology
931 TOPPINO DR
Key West, FL 33040
  • Reassigned Medicare billing, Florida enrollment
  • 29 clinicians in this Medicare group
NPI 1306270806 (239) 489-3166

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.

Anesthesia for nerve modulation procedure spinal cord or repair of bone of spine of lower back accessed through skin using imaging guidance 01942
Anesthesia for nerve modulation or spine repair involves numbing the lower back area. This is done to ensure you don't feel pain during the procedure. The doctor uses imaging technology to accurately place the anesthetic. This makes the procedure safer and more effective.
21 services21 patients
Anesthesia for nerve destruction procedures on spine or spinal cord of lower back accessed through skin using imaging guidance 01940
This is a procedure where anesthesia is applied to numb specific nerves in your lower back. Using imaging guidance, the doctor can accurately locate these nerves through the skin. This is done to alleviate pain by disrupting nerve signals. It's a safe and effective method.
19 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73102 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.06 typical visit price
range $53.00 – $162.61
Typical copayment $30.76 (range $13.25 – $40.65)
Most-billed visit code 99204
Established Patient
$66.48 typical visit price
range $16.68 – $132.40
Typical copayment $16.62 (range $4.17 – $33.10)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

Reported Quality Measures

Pre-operative OSA assessment
Percentage of patients who undergo a surgical procedure in the operating room/procedure room that have a pre-operative assessment for Obstructive Sleep Apnea (OSA)
100%304 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

PATHOLOGY GROUP PC
Pathology (Anatomic Pathology & Clinical Pathology)
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-7041
RACHEL ANN GEORGE CAA
Anesthesiology
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-7000
SOUTHWEST RADIATION ONCOLOGY, INC
Radiology (Radiation Oncology)
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 329-2389
DR. SUHAL S MAHID MD, PHD
Anesthesiology
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-8000
KEITH KURT FISCHBORN MD
Emergency Medicine
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-6154
DAMION L KISTLER MD
Pathology (Anatomic Pathology & Clinical Pathology)
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-7041
ROBERT LEHEW M.D.
Anesthesiology
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-0361
SSM HEALTH CARE OF OKLAHOMA, INC
Nurse Anesthetist, Certified Registered
1000 N LEE AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 272-7000

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 Riley Williams's NPI number?

The NPI number for Riley Williams is 1639375744. It was assigned to this individual provider in the NPPES registry on June 25, 2007.

Where is Riley Williams located?

Riley Williams practices at 1000 N Lee Ave, Oklahoma City, OK 73102. The listed phone number is (405) 272-7000.

What is Riley Williams's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Riley Williams enrolled in Medicare?

Yes. Riley 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 Riley Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Riley Williams reassigns Medicare benefits to 11 organizations: Quiescence Anesthesia LLC (Macon, GA), Fleming Island Anesthesia LLC (Orange Park, FL), Office Anesthesia Staffing (Saint Petersburg, FL), Anesthesiology Professional Services, Inc. (Tampa, FL), Anesthesia Services Of Manatee LLC (Bradenton, FL) and 6 more organizations, listed in the Medicare section above. 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 Riley Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Riley Williams accept?

Health plans from Mending Health and Oscar Health Maintenance Organization of Florida list Riley 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.

When was this NPI record last updated?

The NPPES record for Riley Williams was last updated on June 10, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.