Quick answers
- Does Lisa M. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Lisa M. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Lisa M. Williams see?
- In 2024, CMS data shows 183 Original Medicare patients and 916 services for Lisa M. Williams. This counts Original Medicare only and measures volume, not quality.
- What is Lisa M. Williams's NPI number?
- 1396799169. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Lisa M. Williams, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 183 |
|---|---|
| Services billed to Medicare | 916 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 56 |
Most frequent services
- Psychotherapy, 1 hour (90837)392 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)217 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)58 services
- Psychotherapy, 45 minutes (90834)51 services
- Psychotherapy, 30 minutes (90832)47 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Anxiety75%
- Depression68%
- High cholesterol59%
- High blood pressure50%
- Arthritis30%
- Diabetes23%
Practice locations
Addresses where Lisa M. Williams is enrolled with Medicare (CMS data updated October 2, 2026).
- 10 Tsienneto RdDerry, NH 03038 (603) 434‑1577
Group practices
Medicare enrollment lists Lisa M. Williams as a member of this group (CMS data updated October 2, 2026).
- Mental Health Center for Southern New Hampshire Inc15 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Derry
Clinicians with the same Medicare primary specialty in Derry, NH — not a recommendation.
Other clinicians in Mental Health Center for Southern New Hampshire Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1396799169 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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