Quick answers
- Does Hajerah Sonnabend accept Medicare assignment?
- Yes. Medicare's clinician data says Hajerah Sonnabend 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 Hajerah Sonnabend see?
- In 2024, CMS data shows 87 Original Medicare patients and 148 services for Hajerah Sonnabend. This counts Original Medicare only and measures volume, not quality.
- What is Hajerah Sonnabend's NPI number?
- 1912369570. 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 Hajerah Sonnabend, 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 | 87 |
|---|---|
| Services billed to Medicare | 148 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)82 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)29 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)22 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%
- Arthritis44%
- Diabetes41%
- Chronic kidney disease37%
- Depression32%
Hospitals where Hajerah Sonnabend works
Medicare's Facility Affiliation Data lists Hajerah Sonnabend 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.
- Bronson Battle Creek HospitalBattle Creek, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230075
- Bronson Methodist HospitalKalamazoo, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230017
- Oaklawn HospitalMarshall, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230217
Practice locations
Addresses where Hajerah Sonnabend is enrolled with Medicare (CMS data updated October 2, 2026).
- 300 N AveBattle Creek, MI 49017
- 300 N Ave Outpatient Ctr 2nd Fl, Bronson Neuroscience CenterBattle Creek, MI 49017 (269) 245‑5862
- 363 Fremont StBattle Creek, MI 49017
Group practices
Medicare enrollment lists Hajerah Sonnabend as a member of this group (CMS data updated October 2, 2026).
- Bronson Battle Creek Hospital193 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Other clinicians in Bronson Battle Creek Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| 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) | 1912369570 |
| 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