Erin Pettijohn, M.D.
Erin Pettijohn, M.D. is a Hematology & Oncology Physician in Grand Rapids, MI, registered under NPI 1003101429.
Getting there
Here is what surrounds this office in Grand Rapids, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.20 mi away. The nearest transit stop is 0.22 mi away. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Restaurant Joezano's Pizza 499 ft ~2 min
340 State Street Southeast, Grand Rapids 49503
Mo-We 11:00-11:00; Th,Fr 11:00-12:00; Sa 04:00-12:00; Su 04:00-10:00
Transit Trinity Health 701 ft ~3 min
Parking 710 ft ~3 min
225 Jefferson Avenue Southeast, Grand Rapids 49503
Transit Trinity Health 764 ft ~3 min
Parking 973 ft ~4 min
327 Jefferson Avenue Southeast, Grand Rapids 49503
Parking 0.20 mi ~4 min
232 Sheldon Boulevard Southeast, Grand Rapids 49503
Transit 0.22 mi ~5 min
Coffee PaLatte Coffee & Art 0.28 mi ~6 min
150 Fulton Street East, Grand Rapids
Restaurant Char 0.28 mi ~6 min
Restaurant Gita Pita 0.29 mi ~6 min
2 Jefferson Avenue Southeast, Grand Rapids
Coffee Lantern Coffee Shop 0.37 mi ~8 min
100 Commerce Avenue Southwest, 49503
Sa-Su 08:00-19:00; Mo-Fr 06:00-19:00
Convenience Downtown Convenience Store 0.37 mi ~8 min
Gas station Mobil 0.38 mi ~8 min
415 Division Avenue South, Grand Rapids 49503
Convenience Eli's Division Mart 0.39 mi ~8 min
415 Division Avenue South, Grand Rapids 49503
Coffee Happy Cat Café 0.43 mi ~9 min
447 Division Avenue South, Grand Rapids 49503-5132
Mo-Th 10:00-18:00; Fr-Su 09:00-19:00
Hotel Canopy by Hilton 0.43 mi ~9 min
Convenience Art of the Table 0.48 mi ~10 min
Hotel Residence Inn Grand Rapids Downtown 0.50 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 4301111782 | MI | Hematology & Oncology Physician primary |
This provider holds licence 4301111782 issued in MI. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Hematology/oncology
- PAC ID
- 5890094510
- Enrollment ID
- I20170726000097
Medicare enrolment is recorded as approved under the provider type Practitioner - Hematology/oncology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hematology & Oncology covers
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered. NUCC Health Care Provider Taxonomy, code 207RH0003X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003101429 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 14, 2011 |
| Last updated | Mar 13, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | M.D. |
| Practice address |
250 CHERRY ST SE STE 2200 Grand Rapids, MI 49503 (616) 685-5600 |
| Mailing address |
5800 FOREMOST DR SE STE 300 Grand Rapids, MI 49546 |
| Other names |
Erin Bernethy Former Legal Business Name |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 1 | 0 | 1 | 4 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 2 | 4 | 4 |
Sum = 41 · next multiple of 10 = 50 · check digit = 9 · actual last digit = 9
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.