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DR. DAVID RYAN WILLIAMS MD
NPI 1528649134
Anesthesiology in Little Rock, AR

Active since April 15, 2021PECOS EnrolledAccepts Medicare Assignment
4301 W MARKHAM ST, LITTLE ROCK, AR 72205(501) 686-8000 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 13, 2026, May 6, 2026, Apr 15, 2021 (3 updates tracked since 2021).

About Dr. David Ryan Williams Md NPPES

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

DR. DAVID RYAN WILLIAMS MD (NPI 1528649134) is an individual anesthesiology provider in Little Rock, Arkansas, licensed in Arkansas (E-19777) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, maintains a secondary practice location in Little Rock, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1528649134
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. DAVID RYAN WILLIAMSCredential: MD
Location Address4301 W MARKHAM STLittle Rock, AR 72205-7101
Mailing Address11001 Executive Center Dr Ste 200Little Rock, AR 72211-4393 · (501) 812-7215 · Fax (501) 812-7207
Phone(501) 686-8000
Sole ProprietorYes
Medical School CMSOtherGraduated 2022
Enumeration DateApril 15, 2021
Last NPPES UpdateMay 13, 20263 updates tracked since enumeration
NPPES CertifiedMay 13, 2026
✔ NPI 1528649134 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in AR · E-19777
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
4301 W MARKHAM ST, Little Rock, AR 72205
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Secondary Practice Location 1

Location 19601 Baptist Health Dr Ste 1ALittle Rock, AR 72205-6321 · Phone (501) 202-2093 · Fax (501) 202-6316

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Health Advantage, Octave.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. David Ryan Williams Md 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 ID4284012436
PECOS Enrollment IDI20260521004536
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show David Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arkansas Health Group
3.5 mi
Anesthesiology
9601 BAPTIST HEALTH DR
Little Rock, AR 72205
  • Reassigned Medicare billing, Arkansas enrollment
  • 253 clinicians in this Medicare group
NPI 1508800962 (501) 202-2093

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

MRS. LESLEY BROOKE JONES R.D.
Dietitian, Registered
4301 W MARKHAM ST
LITTLE ROCK, AR 72205
Pulaski County (501) 686-6857
NANCY MAALOUF M.D.
Student in an Organized Health Care Education/Training Program
4301 W MARKHAM ST, SLOT # 500
LITTLE ROCK, AR 72205
Pulaski County (501) 296-1165
DR. ARMANDO LEONEL MARTINEZ M.D.
Emergency Medicine
4301 W MARKHAM ST, SLOT 783
LITTLE ROCK, AR 72205
Pulaski County (501) 686-8000
ELENA AMBROGINI MD PHD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
4301 W MARKHAM ST, # 783
LITTLE ROCK, AR 72205
Pulaski County (501) 686-8000
SUKANTHI KOVVURU
Psychiatry & Neurology (Neuromuscular Medicine)
4301 W MARKHAM ST
LITTLE ROCK, AR 72205
Pulaski County (609) 865-3702
DR. TYLER KRISTOPHER ROSE M.D.
Student in an Organized Health Care Education/Training Program
4301 W MARKHAM ST
LITTLE ROCK, AR 72205
Pulaski County (501) 686-8000
ZAIN BLACKWELL
Student in an Organized Health Care Education/Training Program
4301 W MARKHAM ST
LITTLE ROCK, AR 72205
Pulaski County (501) 686-8000
MUHAMMAD JAWAD JAVED MD
Student in an Organized Health Care Education/Training Program
4301 W MARKHAM ST
LITTLE ROCK, AR 72205
Pulaski County (501) 686-8000

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 David Williams's NPI number?

The NPI number for David Williams is 1528649134. It was assigned to this individual provider in the NPPES registry on April 15, 2021.

Where is David Williams located?

David Williams practices at 4301 W Markham St, Little Rock, AR 72205. The listed phone number is (501) 686-8000.

What is David Williams's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is David Williams enrolled in Medicare?

Yes. David 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 organization bills Medicare for David Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Williams reassigns Medicare benefits to Arkansas Health Group (Little Rock, AR). The 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 David Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Williams accept?

Health plans from Health Advantage and Octave list David 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 David Williams was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.