1. Home
  2. Directory
  3. Alabama
  4. Mobile
  5. Pediatrics
  6. NPI Profile

DR. KATHRYN L WILLIAMS DO
NPI 1720314768
Pediatrics - Pediatric Gastroenterology in Mobile, AL

Active since October 27, 2009PECOS Enrolled
1601 CENTER ST, MOBILE, AL 36604(251) 410-5437(251) 410-3852 Get Directions Write a Review

NPPES record last updated: July 28, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 28, 2022, Jan 7, 2021, Dec 23, 2020 and 3 more (6 updates tracked since 2019).

About Dr. Kathryn L Williams Do NPPES

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

DR. KATHRYN L WILLIAMS DO (NPI 1720314768) is an individual pediatric gastroenterology provider in Mobile, Alabama, licensed in Alabama (DO.2972) and active in the NPI registry since October 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1720314768
Entity TypeIndividualFemale
Primary Taxonomy2080P0206X
Provider Legal NameDR. KATHRYN L WILLIAMSCredential: DO
Location Address1601 CENTER STMobile, AL 36604-1541
Mailing AddressPo Box 746450Atlanta, GA 30374-6450 · (251) 434-3626 · Fax (251) 445-2464
Phone(251) 410-5437
Fax(251) 410-3852
Sole ProprietorNo
Enumeration DateOctober 27, 2009
Last NPPES UpdateJuly 28, 20226 updates tracked since enumeration
NPPES CertifiedJuly 28, 2022
✔ NPI 1720314768 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0206X
Licenses✔ Licensed in AL · DO.2972✔ Licensed in OH · 34.012245
Definition
A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.
1601 CENTER ST, Mobile, AL 36604
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Kathryn L Williams Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

3

Medicare enrollment records show Kathryn Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Usa Health Physician Billing Services LLC
Same address
Obstetrics & Gynecology
1601 CENTER ST
Mobile, AL 36604
  • Reassigned Medicare billing, Alabama enrollment
  • 857 clinicians in this Medicare group
NPI 1013574722 (251) 415-1496
Promedica Children's Specialists
797 mi
Pediatrics
100 MADISON AVE, MSC-S38805
Toledo, OH 43604
  • Reassigned Medicare billing, Ohio enrollment
  • 70 clinicians in this Medicare group
NPI 1245444959 (567) 585-1969
Promedica Multi Specialty Physicians
797 mi
Family Medicine
100 MADISON AVE, MSC-S38805
Toledo, OH 43604
  • Reassigned Medicare billing, Ohio enrollment
  • 303 clinicians in this Medicare group
NPI 1306105150 (567) 585-1964

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 36604 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
$122.31 typical visit price
range $52.65 – $161.63
Typical copayment $30.57 (range $13.16 – $40.40)
Most-billed visit code 99204
Established Patient
$93.72 typical visit price
range $16.56 – $131.65
Typical copayment $23.43 (range $4.14 – $32.91)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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. JENNIFER GALLAGHER WILLIAMS CRNP
Nurse Practitioner (Pediatrics)
1601 CENTER ST, STE 1S
MOBILE, AL 36604
Mobile County (251) 410-5437
LADONNA M. CREWS MD
Pediatrics
1601 CENTER ST, STE 1N
MOBILE, AL 36604
Mobile County (251) 410-5437
USA HEALTH PHYSICIAN BILLING SERVICES LLC
Obstetrics & Gynecology
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 415-1496
USA HEALTH PHYSICIAN BILLING SERVICES LLC
Pediatrics (Pediatric Nephrology)
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 410-5437
ELIZABETH FAIR PHD
Psychologist (Clinical)
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 410-5437
LANI GILES CRNP
Nurse Practitioner
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 660-5763
KENDRA CRUM CRNP
Nurse Practitioner (Family)
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 410-5437
DR. MURPHY MCGRIFF WALTERS MD
Orthopaedic Surgery
1601 CENTER ST
MOBILE, AL 36604
Mobile County (251) 665-8200

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 Kathryn Williams's NPI number?

The NPI number for Kathryn Williams is 1720314768. It was assigned to this individual provider in the NPPES registry on October 27, 2009.

Where is Kathryn Williams located?

Kathryn Williams practices at 1601 Center St, Mobile, AL 36604. The listed phone number is (251) 410-5437.

What is Kathryn Williams's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Kathryn Williams enrolled in Medicare?

Yes. Kathryn Williams is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Kathryn Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kathryn Williams reassigns Medicare benefits to 3 organizations: Usa Health Physician Billing Services LLC (Mobile, AL), Promedica Children's Specialists (Toledo, OH) and Promedica Multi Specialty Physicians (Toledo, OH). 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 Kathryn Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kathryn Williams accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 5 other insurers list Kathryn 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 Kathryn Williams was last updated on July 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.