Quick answers
- Does Marianne L. McClain accept Medicare assignment?
- Yes. Medicare's clinician data says Marianne L. McClain 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 Marianne L. McClain see?
- In 2024, CMS data shows 21 Original Medicare patients and 69 services for Marianne L. McClain. This counts Original Medicare only and measures volume, not quality.
- What is Marianne L. McClain's NPI number?
- 1396906392. 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 Marianne L. McClain, 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 | 21 |
|---|---|
| Services billed to Medicare | 69 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Exam of neurobehavioral status, first hour (96116)23 services
- Administration of psychological or neuropsychological test, first 30 minutes (96136)23 services
- Administration of psychological or neuropsychological test, each additional 30 minutes (96137)23 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).
- High blood pressure75%
- High cholesterol67%
- Arthritis62%
- Alzheimer's disease or dementia52%
Practice locations
Addresses where Marianne L. McClain is enrolled with Medicare (CMS data updated October 2, 2026).
- 1025 Maine StQuincy, IL 62301 (217) 222‑6550
Group practices
Medicare enrollment lists Marianne L. McClain as a member of this group (CMS data updated October 2, 2026).
- Quincy Physicians and Surgeons Clinic, PLLC223 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Quincy Physicians and Surgeons Clinic, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PSY |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396906392 |
| 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