What is Margaret Walker's NPI number?

Margaret Walker's National Provider Identifier (NPI) is 1356217590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Margaret Walker's specialty?

Margaret Walker is listed in the NPPES registry with a primary specialty of School Psychologist (Behavioral Health & Social Service Providers).

Where is Margaret Walker located?

Margaret Walker's practice location on file with NPPES is 505 Largo Rd, Largo, MD 20774-2197.

What is Margaret Walker's phone number?

The practice phone number listed in the NPPES registry for Margaret Walker is (301) 808-8880.

Is Margaret Walker's NPI active?

Yes — Margaret Walker's NPI (1356217590) is active in the NPPES registry as of the last update on 2025-10-15.

IndividualActive

Margaret Walker

NPI 1356217590 · School Psychologist · Largo, MD

Margaret Walker is a School Psychologist provider in Largo, MD (NPI 1356217590).

Provider details

NPI number: 1356217590
Entity type: Individual
Primary specialty: School PsychologistBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: Yes

Specialties & taxonomies

School PsychologistPrimary103TS0200X
Behavioral Health & Social Service Providers

Profile Score

Established profile(52/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
2 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

505 Largo Rd

Largo, MD 20774-2197

Phone: (301) 808-8880

Street-level locationGet directions

More MD providers

Mailing address

611 60th Pl

Fairmount Heights, MD 20743-1602

Additional practice locations (1)

7302 Webster Ln
Fort Washington, MD 20744-1063
Phone: (301) 449-4970

Enumerated: 2025-10-15
Last updated: 2025-10-15
Certified: 2025-10-14

Frequently asked questions

What is Margaret Walker's NPI number?: Margaret Walker's National Provider Identifier (NPI) is 1356217590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Margaret Walker's specialty?: Margaret Walker is listed in the NPPES registry with a primary specialty of School Psychologist (Behavioral Health & Social Service Providers).
Where is Margaret Walker located?: Margaret Walker's practice location on file with NPPES is 505 Largo Rd, Largo, MD 20774-2197.
What is Margaret Walker's phone number?: The practice phone number listed in the NPPES registry for Margaret Walker is (301) 808-8880.
Is Margaret Walker's NPI active?: Yes — Margaret Walker's NPI (1356217590) is active in the NPPES registry as of the last update on 2025-10-15.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.