Quick answers
- Where does John Knowlton see patients?
- Medicare's clinician data lists 2 practice locations, including Washington, DC and Frederick, MD. Call before your visit to confirm the address.
- What is John Knowlton's specialty?
- Medicare lists Physical Therapist in Private Practice as the primary specialty.
- Does John Knowlton accept Medicare assignment?
- Yes. Medicare's clinician data says John Knowlton accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John Knowlton?
- (202) 835-2222, as listed in official Medicare / NPI Registry data.
- What is John Knowlton's NPI number?
- 1316537566. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John Knowlton is enrolled with Medicare (CMS data updated 2026-10-02).
- 1015 18th St NW, Suite 300 Orthopaedic Medicine and SurgeryWashington, DC 20036 (202) 835‑2222
- 197 Thomas Johnson Dr, Suite BFrederick, MD 21702 (301) 662‑1997
Group practices
Medicare enrollment lists John Knowlton as a member of these groups (CMS data updated 2026-10-02).
- Centers for Advanced Orthopaedics LLC604 clinicians in the group
- Homecare Rehab and Nursing LLC10 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, District of Columbia →
Other physical therapists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316537566 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians