Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
J Ryan Hammock, MD
Hospitalist Physician in Dayton, OH · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1548395940
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Registry record
Entity type Individual (Type 1)
Name J Ryan Hammock
Credential MD
Sex Male
Practice address 30 E Apple St, Suite Nw3300, Dayton, OH, 45409
Phone (937) 208-8394
Fax (937) 208-8388
Enumeration date Feb 23, 2007
Last updated in NPPES Jun 30, 2014
Taxonomy & licenses
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 35.091398 (OH) Primary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 35.091398 (OH) Secondary
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 |
|---|---|---|---|
| 2932661 | Medicaid | OH | - |
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
How do I verify J Ryan Hammock's NPI record?
Cross-check NPI 1548395940 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1548395940 active?
Yes, as of the latest NPPES snapshot, NPI 1548395940 is active (record last updated 2014-06-30).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-30.