Tabitha S. Knowlton
Speech-Language Pathologist · Issaquah, WA
Tabitha S. Knowlton is a speech-language pathologist with a practice address in Issaquah, Washington, and NPI 1902763477, issued on Jan 7, 2026. Check the license (Washington LL61581740, as entered in NPPES) with the Washington board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Tabitha S. Knowlton
- Primary taxonomy
- Speech-Language Pathologist 235Z00000X
- License number
- LL61581740 WA
Self-reported in NPPES; status is on the state search - Practice location
- 5150 220TH Ave SE, Issaquah, WA 98029
- Phone
- (425) 837-7000
- Enumerated
- Jan 7, 2026
- Record last updated
- Jan 14, 2026
- Entity
- Type 1 · individual
8 nearest speech-language pathologist records → All 4,109 in Washington → Look up another NPI →
Also registered at 5150 220TH Ave SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shwetha Anand, M.S., SLPSpeech-Language Pathologist1417878042
- Carissa Anderson, PT, DPTPhysical Therapist1093542268
- Rebecca KneepkensSpeech-Language Pathologist1063889236
- Joseph Morgan, DPTPhysical Therapist1760108500
- Andrea Quintanares, COTA/LOccupational Therapy Assistant1215796297
- Irene Ragan, MS, CCC-SLPSpeech-Language Pathologist1154271989
Verify Tabitha S. Knowlton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license LL61581740Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Tabitha S. Knowlton among 4,109 speech-language pathologist records in Washington
Tabitha S. Knowlton is one of 4,109 speech-language pathologist records with a practice address in Washington. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2026, is newer than 98% of them.
- NPI issued2026 · 98% of these records are older, 0% newer
- In a Medicare fileNo · 2% of these records are
- In the CMS Doctors and Clinicians fileNo · 4% of these records are
- Record last updated2026 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 235Z00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 speech-language pathologist records list a practice address in Issaquah
They are 79 of the 1,727 NPPES records with a practice address in Issaquah, and 4,109 speech-language pathologist records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 4,109 in Washington → Every provider in Issaquah → Speech-Language Pathologist nationwide →
The 8 speech-language pathologist records with the nearest ZIP codes
- Shwetha Anand, M.S., SLPIssaquah, WA 980291417878042
- Sarah BuchmannIssaquah, WA 980291942174982
- Leigh Anne Colbert, M.A. CCC-SLPIssaquah, WA 980291962671727
- Madeleine Goldsmith, M.S., CCC-SLPIssaquah, WA 980291912880998
- Rebecca KneepkensIssaquah, WA 980291063889236
- Elisabeth PorpylevIssaquah, WA 980291760811608
- Irene Ragan, MS, CCC-SLPIssaquah, WA 980291154271989
- Trista SteeleIssaquah, WA 980291487055109
Common questions
What is Tabitha S. Knowlton's NPI number?
Tabitha S. Knowlton's National Provider Identifier (NPI) is 1902763477, issued on Jan 7, 2026. An NPI identifies a provider in billing; it is not a license.
Where is Tabitha S. Knowlton located?
The NPPES record lists a practice address at 5150 220TH Ave SE, Issaquah, WA, 98029. Phone: (425) 837-7000. Providers update this record themselves, so call before visiting.
How can I verify Tabitha S. Knowlton's license?
NPPES lists Washington license number LL61581740, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.