William Classen
Physical Medicine & Rehabilitation Physician · Katy, TX
William Classen is a physical medicine & rehabilitation physician with a practice address in Katy, Texas, and NPI 1447858162, issued on Oct 14, 2020. Check the license (Texas 2146582, as entered in NPPES) on the Texas Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Classen
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- 2146582 TX
Self-reported in NPPES; status is on the state search - Practice location
- 23215 Red River Dr, Katy, TX 77494
- Phone
- (978) 809-4692
- Enumerated
- Oct 14, 2020
- Record last updated
- Oct 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,099 in Texas → Look up another NPI →
Also registered at 23215 Red River Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Syed Ahmed, MDInternal Medicine Physician1184673253
Verify William Classen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license 2146582Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Classen among 1,099 physical medicine & rehabilitation physician records in Texas
William Classen is one of 1,099 physical medicine & rehabilitation physician records with a practice address in Texas. 55% 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 2020, is newer than 78% of them.
- NPI issued2020 · 78% of these records are older, 17% newer
- In a Medicare fileNo · 55% of these records are
- In the CMS Doctors and Clinicians fileNo · 47% of these records are
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in Texas
There are 1,099 physical medicine & rehabilitation physician records in Texas. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,099 in Texas → Every provider in Katy → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Samuel Kim, M.D.Katy, TX 774941467984690
- Aaron Lin, MDKaty, TX 774941215434741
- Danique Vandongen, MDKaty, TX 774941003009986
- Zherina Bernardino-Buenaventura, PT,DPTKaty, TX 774931679185383
- Lindsay PhillipsKaty, TX 774931285199703
- Blanca Ramirez, COTAKaty, TX 774931467917989
- Dawn FrazierPasadena, TX 775031568939122
- Kevin McNeillPasadena, TX 775051316661457
Common questions
What is William Classen's NPI number?
William Classen's National Provider Identifier (NPI) is 1447858162, issued on Oct 14, 2020. An NPI identifies a provider in billing; it is not a license.
Where is William Classen located?
The NPPES record lists a practice address at 23215 Red River Dr, Katy, TX, 77494. Phone: (978) 809-4692. Providers update this record themselves, so call before visiting.
How can I verify William Classen's license?
NPPES lists Texas license number 2146582, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.