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KARLENE DIONNE WALKER M.D.
NPI 1821475641
Pediatrics - Developmental - Behavioral Pediatrics in Birmingham, AL

Active since April 30, 2015PECOS Enrolled
930 20TH ST S STE 140, BIRMINGHAM, AL 35205(205) 934-8923 Get Directions Write a Review

NPPES record last updated: June 22, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 22, 2023, Jun 19, 2019, Dec 11, 2018 (3 updates tracked since 2018).

About Karlene Dionne Walker M.d. NPPES

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

KARLENE DIONNE WALKER M.D. (NPI 1821475641) is an individual developmental - behavioral pediatrics provider in Birmingham, Alabama, licensed in Alabama (35704) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS and maintains a secondary practice location in Birmingham.

NPPES Registry Identity

NPI1821475641
Entity TypeIndividualFemale
Primary Taxonomy2080P0006X
Provider Legal NameKARLENE DIONNE WALKERCredential: M.D.
Location Address930 20TH ST S STE 140Birmingham, AL 35205-2610
Mailing Address930 20th St S Ste 140Birmingham, AL 35205-2610 · (205) 934-8923
Phone(205) 934-8923
Sole ProprietorNo
Enumeration DateApril 30, 2015
Last NPPES UpdateJune 22, 20233 updates tracked since enumeration
NPPES CertifiedJune 22, 2023
✔ NPI 1821475641 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Developmental - Behavioral PediatricsAllopathic & Osteopathic Physicians
Taxonomy Code2080P0006X
License✔ Licensed in AL · 35704
Definition
A developmental-behavioral specialist is a pediatrician with special training and experience who aims to foster understanding and promotion of optimal development of children and families through research, education, clinical care and advocacy efforts. This physician assists in the prevention, diagnosis, and management of developmental difficulties and problematic behaviors in children and in the family dysfunctions that compromise children's development.
Also ListedPediatricsTaxonomy 208000000X · License 35704 (AL)
930 20TH ST S STE 140, Birmingham, AL 35205
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Secondary Practice Location 1

Location 11600 7th Ave SBirmingham, AL 35233-1711 · Phone (205) 934-8923

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Alabama.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karlene Dionne Walker M.d. 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 Reassignment

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

University Of Alabama Health Services Foundation, PC
0.4 mi
Ambulatory Surgical
2000 6TH AVE SOUTH
Birmingham, AL 35233
  • Reassigned Medicare billing, Alabama enrollment
  • 4,494 clinicians in this Medicare group
NPI 1124213376 (205) 801-8000

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

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 Karlene Walker's NPI number?

The NPI number for Karlene Walker is 1821475641. It was assigned to this individual provider in the NPPES registry on April 30, 2015.

Where is Karlene Walker located?

Karlene Walker practices at 930 20th St S Ste 140, Birmingham, AL 35205. The listed phone number is (205) 934-8923.

What is Karlene Walker's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Developmental - Behavioral Pediatrics, with taxonomy code 2080P0006X.

Is Karlene Walker enrolled in Medicare?

Yes. Karlene Walker is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karlene Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karlene Walker reassigns Medicare benefits to University Of Alabama Health Services Foundation, PC (Birmingham, AL). 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 Karlene Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karlene Walker accept?

Health plans from Blue Cross and Blue Shield of Alabama list Karlene Walker 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 Karlene Walker was last updated on June 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.