Quick answers
- Does Erin L. Hillis accept Medicare assignment?
- Yes. Medicare's clinician data says Erin L. Hillis 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 Erin L. Hillis see?
- In 2024, CMS data shows 521 Original Medicare patients and 2,876 services for Erin L. Hillis. This counts Original Medicare only and measures volume, not quality.
- What is Erin L. Hillis's NPI number?
- 1538894753. 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 Erin L. Hillis, 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 | 521 |
|---|---|
| Services billed to Medicare | 2,876 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 82 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)1,110 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)504 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)491 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)422 services
- Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes (99348)117 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 cholesterol75%
- Alzheimer's disease or dementia75%
- Anxiety71%
- Depression60%
- Arthritis54%
Hospitals where Erin L. Hillis works
Medicare's Facility Affiliation Data lists Erin L. Hillis 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.
- Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033
- Griffin HospitalDerby, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070031
- Midstate Medical CenterMeriden, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070017
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070022
Practice locations
Addresses where Erin L. Hillis is enrolled with Medicare (CMS data updated October 2, 2026).
- 250 Indian River Rd, Suite 300Orange, CT 06477 (203) 738‑7700
Group practices
Medicare enrollment lists Erin L. Hillis as a member of this group (CMS data updated October 2, 2026).
- HHC Physician Services PLLC132 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Orange
Clinicians with the same Medicare primary specialty in Orange, CT — not a recommendation.
Other clinicians in HHC Physician Services PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | Yale University School Of Medicine |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538894753 |
| 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