William Classen
NPI 1447858162 · Physical Medicine & Rehabilitation Physician · Katy, TX
William Classen is a Physical Medicine & Rehabilitation Physician provider in Katy, TX (NPI 1447858162).
Provider details
- NPI number
- 1447858162
- Entity type
- Individual
- Primary specialty
- Physical Medicine & Rehabilitation PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 2146582 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Mailing address
Registry dates
- Enumerated
- 2020-10-14
- Last updated
- 2020-10-14
- Certified
- 2020-10-14
Frequently asked questions
- What is William Classen's NPI number?
- William Classen's National Provider Identifier (NPI) is 1447858162, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Classen's specialty?
- William Classen is listed in the NPPES registry with a primary specialty of Physical Medicine & Rehabilitation Physician (Allopathic & Osteopathic Physicians).
- Where is William Classen located?
- William Classen's practice location on file with NPPES is 23215 Red River Dr, Katy, TX 77494-2031.
- What is William Classen's phone number?
- The practice phone number listed in the NPPES registry for William Classen is (978) 809-4692.
- Is William Classen's NPI active?
- Yes — William Classen's NPI (1447858162) is active in the NPPES registry as of the last update on 2020-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.