Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Frederick, M.D.
Hospitalist Physician in Dyer, IN · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598027153
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Registry record
Entity type Individual (Type 1)
Name Dr. John Frederick
Credential M.D.
Sex Male
Practice address 24 Joliet St, Dyer, IN, 46311
Phone (219) 865-2141
Enumeration date Jun 11, 2012
Last updated in NPPES Mar 19, 2021
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 01076100A (IN) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036138817 (IL) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 01076100A (IN) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 201338270 | Medicaid | IN | - |
| F400244803 | Other | IL | MEDICARE PTAN |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does John Frederick practice?
The practice location on file with NPPES is in Dyer, IN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Frederick?
The National Provider Identifier (NPI) for John Frederick is 1598027153, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-19.