Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Isaac Baker, M.D.
Surgery Physician in Jasper, AL · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821389081
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name John Isaac Baker
Credential M.D.
Sex Male
Practice address 3400 Highway 78 E, Medical Arts Tower, Suite 502, Jasper, AL, 35501
Phone (205) 221-4916
Enumeration date Apr 22, 2011
Last updated in NPPES Jun 2, 2016
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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 Baker practice?
The practice location on file with NPPES is in Jasper, AL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Baker?
The National Provider Identifier (NPI) for John Baker is 1821389081, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Ivana Kajdos Internal Medicine Physician · Jasper, AL NPI 1215939301 Walker Baptist Medical Center Home Health Home Health Agency · Jasper, AL NPI 1528050176 Roy L Sims MD PC Specialist · Jasper, AL NPI 1497737233 Radiology Associates of North Alabama Diagnostic Radiology Physician · Jasper, AL NPI 1982689196 Mark Roberts Diagnostic Radiology Physician · Jasper, AL NPI 1851376073 Kenneth Hager Diagnostic Radiology Physician · Jasper, AL NPI 1477538163 James Bradley Diagnostic Radiology Physician · Jasper, AL NPI 1538144233 Robert Armstrong Certified Registered Nurse Anesthetist · Jasper, AL NPI 1598745416
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-02.