Quick answers
- Does Lydia A. Flier accept Medicare assignment?
- Yes. Medicare's clinician data says Lydia A. Flier 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 Lydia A. Flier see?
- In 2024, CMS data shows 318 Original Medicare patients and 1,574 services for Lydia A. Flier. This counts Original Medicare only and measures volume, not quality.
- What is Lydia A. Flier's NPI number?
- 1104273911. 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 Lydia A. Flier, 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 | 318 |
|---|---|
| Services billed to Medicare | 1,574 |
| Different services or procedures | 52 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)355 services
- Insertion of needle into vein for collection of blood sample (36415)310 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)200 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)181 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)77 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 pressure62%
- High cholesterol62%
- Arthritis37%
- Anxiety29%
- Osteoporosis26%
- Depression24%
Hospitals where Lydia A. Flier works
Medicare's Facility Affiliation Data lists Lydia A. Flier at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Anna Jaques HospitalNewburyport, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220029
- Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220086
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220071
- Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002
- Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105
Practice locations
Addresses where Lydia A. Flier is enrolled with Medicare (CMS data updated October 2, 2026).
- 2600 Compass RdGlenview, IL 60026
- 330 Mount Auburn StCambridge, MA 02138 (617) 499‑5065
Group practices
Medicare enrollment lists Lydia A. Flier as a member of these groups (CMS data updated October 2, 2026).
- Select Rehabilitation, LLC2,046 clinicians in the group
- Mount Auburn Professional Services Inc231 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Glenview
Clinicians with the same Medicare primary specialty in Glenview, IL — not a recommendation.
Other clinicians in Select Rehabilitation, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1104273911 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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