Quick answers
- Which hospitals does Erin Pettijohn work at?
- Medicare's official clinician data lists Erin Pettijohn at 5 hospitals: Corewell Health Ludington Hospital, Mercy Health Lakeshore Campus, Mercy Health Saint Mary's, Spectrum Health and Trinity Health Muskegon Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Erin Pettijohn see patients?
- Medicare's clinician data lists 5 practice locations, including Holland, MI, Grand Rapids, MI and Norton Shores, MI. Call before your visit to confirm the address.
- What is Erin Pettijohn's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Erin Pettijohn accept Medicare assignment?
- Yes. Medicare's clinician data says Erin Pettijohn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Erin Pettijohn offer telehealth?
- Medicare's clinician data says Erin Pettijohn offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Erin Pettijohn?
- (616) 399-6500, as listed in official Medicare / NPI Registry data.
- What is Erin Pettijohn's NPI number?
- 1003101429. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Erin Pettijohn works
Medicare's Facility Affiliation Data lists Erin Pettijohn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corewell Health Ludington HospitalLudington, MI · Acute Care Hospital · CCN 230110
- Mercy Health Lakeshore CampusShelby, MI · Critical Access Hospital · CCN 231320
- Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · CCN 230059
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
- Trinity Health Muskegon HospitalMuskegon, MI · Acute Care Hospital · CCN 230066
Practice locations
Addresses where Erin Pettijohn is enrolled with Medicare (CMS data updated 2026-10-02).
- 12460 Riley StHolland, MI 49424 (616) 399‑6500
- 145 Michigan St NE, Suite 3100Grand Rapids, MI 49503 (616) 954‑9800
- 5800 Foremost Dr SEGrand Rapids, MI 49546 (616) 954‑9800
- 6425 S Harvey StNorton Shores, MI 49444 (231) 737‑3469
- 710 Kenmoor Ave SE, Suite 200Grand Rapids, MI 49546 (616) 389‑1800
Group practices
Medicare enrollment lists Erin Pettijohn as a member of this group (CMS data updated 2026-10-02).
- Cancer and Hematology Centers of Western Mi, P.C.110 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Holland
Clinicians with the same Medicare primary specialty in Holland, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003101429 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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