Corey John Grahn, NP-C
Nurse Practitioner · Ionia, MI
Corey John Grahn, NP-C is a nurse practitioner with a practice address in Ionia, Michigan, and NPI 1336474212, issued on Oct 9, 2009. Check the license (Michigan 4704177461, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Corey John Grahn
- Credential
- NP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 4704177461 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1342 W Main St, Ionia, MI 48846
- Phone
- (616) 527-2500
- Enumerated
- Oct 9, 2009
- Record last updated
- Feb 14, 2025
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,574 in Michigan → Look up another NPI →
Verify Corey John Grahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 4704177461Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $222.67
2 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Corey John Grahn among 3,574 nurse practitioner records in Michigan
Corey John Grahn, NP-C is one of 3,574 nurse practitioner records with a practice address in Michigan. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 25% of them.
- NPI issued2009 · 25% of these records are older, 73% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 56% of these records are
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 nurse practitioner records list a practice address in Ionia
They are 4 of the 425 NPPES records with a practice address in Ionia, and 3,574 nurse practitioner records in Michigan.
All 3,574 in Michigan → Every provider in Ionia → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Kayley Bruinsma, NP-CIonia, MI 488461689076317
- Joshua Schad, NP-CIonia, MI 488461003204199
- Matthew Wideman, DNP, RN, AGNP-CIonia, MI 488461871112904
- Nicole Conklin, NPLaingsburg, MI 488481689271314
- Elizabeth Derkin, NPHowell, MI 488431528149283
- Ellen Keefe-Garner, PMHNP-BCHowell, MI 488431356922611
- Anne Kenney, NURSE PRACTITIONERHowell, MI 488431184722852
- Ann Mack, NURSE PRACTITIONERHowell, MI 488431508822644
Common questions
What is Corey John Grahn, NP-C's NPI number?
Corey John Grahn, NP-C's National Provider Identifier (NPI) is 1336474212, issued on Oct 9, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Corey John Grahn, NP-C located?
The NPPES record lists a practice address at 1342 W Main St, Ionia, MI, 48846. Phone: (616) 527-2500. Providers update this record themselves, so call before visiting.
How can I verify Corey John Grahn, NP-C's license?
NPPES lists Michigan license number 4704177461, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.