Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOAN CASSANDRA PAYNE
NPI 1598240913
Speech-Language Pathologist in Washington, DC

Q: What is Joan Payne's NPI number?

The NPI number for Joan Payne is 1598240913. It was assigned to this individual provider in the NPPES registry on October 2, 2018.

Q: What is Joan Payne's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Q: When was this NPI record last updated?

The NPPES record for Joan Payne was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 48 days 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.

Active since October 02, 2018

4311 13TH ST NE, WASHINGTON, DC 20017(202) 378-4537 Get Directions Write a Review

NPPES record last updated: August 16, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

Record update history: Aug 16, 2026, Oct 2, 2018 (2 updates tracked since 2018).

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About Dr. Joan Cassandra Payne NPPES

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

DR. JOAN CASSANDRA PAYNE (NPI 1598240913) is an individual speech-language pathologist provider in Washington, District Of Columbia, licensed in District Of Columbia (SLP001297) and active in the NPI registry since October 2018.

NPPES Registry Identity

NPI1598240913

Entity TypeIndividualFemale

Primary Taxonomy235Z00000X

Provider Legal NameDR. JOAN CASSANDRA PAYNE

Location Address4311 13TH ST NEWashington, DC 20017-3828

Mailing Address4311 13th St NeWashington, DC 20017-3828 · (202) 378-4537

Phone(202) 378-4537

Sole ProprietorYes

Enumeration DateOctober 2, 2018

Last NPPES UpdateAugust 16, 20262 updates tracked since enumeration

✔ NPI 1598240913 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers

Taxonomy Code235Z00000X

License✔ Licensed in DC · SLP001297

Definition

The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

4311 13TH ST NE, Washington, DC 20017

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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 Joan Payne's NPI number?

The NPI number for Joan Payne is 1598240913. It was assigned to this individual provider in the NPPES registry on October 2, 2018.

Where is Joan Payne located?

Joan Payne practices at 4311 13th St NE, Washington, DC 20017. The listed phone number is (202) 378-4537.

What is Joan Payne's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Joan Payne was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 48 days 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.