Gretchen Williams, PT
NPI 1649221193 · Physical Medicine & Rehabilitation Physician · Geneva, IL
Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Williams, PT is a Physical Medicine & Rehabilitation Physician provider in Geneva, IL (NPI 1649221193).
Provider details
- NPI number
- 1649221193
- Entity type
- Individual
- Primary specialty
- Physical Medicine & Rehabilitation PhysicianAllopathic & Osteopathic Physicians
- Credential
- PT
- Sex
- Female
- Sole proprietor
- No
- License
- 070011139 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,444 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 1,558 | $27 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 457 | $22 |
| Electrical Stimulation (unattended), to One Or More Areas for Indication(s) Other Than Wound Care, As Part of a Therapy Plan of CareG0283 | 239 | $9 |
| Therapy Procedure Using Functional Activities97530 | 173 | $32 |
| Evaluation for Physical Therapy, Typically 20 Minutes97161 | 17 | $102 |
Typical Medicare-allowed amounts for these services range $9–$102 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-12
- Last updated
- 2017-03-17
Frequently asked questions
- What is Gretchen Williams's NPI number?
- Gretchen Williams's National Provider Identifier (NPI) is 1649221193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Williams's specialty?
- Gretchen Williams is listed in the NPPES registry with a primary specialty of Physical Medicine & Rehabilitation Physician (Allopathic & Osteopathic Physicians).
- Where is Gretchen Williams located?
- Gretchen Williams's practice location on file with NPPES is 2700 Keslinger Rd, Geneva, IL 60134-4645.
- What is Gretchen Williams's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Williams is (630) 262-2633.
- Does Gretchen Williams accept Medicare?
- Gretchen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Williams's NPI active?
- Yes — Gretchen Williams's NPI (1649221193) is active in the NPPES registry as of the last update on 2017-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.