John G. Underwood, M.D.
Internal Medicine Physician · Shreveport, LA
John G. Underwood, M.D. is an internal medicine physician with a practice address in Shreveport, Louisiana, and NPI 1619937802, issued on Mar 23, 2006. Check the license (Louisiana L03841, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John G. Underwood
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- L03841 LA
Self-reported in NPPES; status is on the state search - Practice location
- 9091 Ellerbe RD, Shreveport, LA 71106
- Phone
- (318) 681-1630
- Enumerated
- Mar 23, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (318) 681-1632
- Medicaid ID
- 1300675 LA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,749 in Louisiana → Look up another NPI →
Also registered at 9091 Ellerbe RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kenneth Mouser, DDSGeneral Practice Dentistry1689768897
- Peter Nasser, DDSOrthodontics and Dentofacial Orthopedics Dentistry1922235597
Verify John G. Underwood in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license L03841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John G. Underwood among 1,749 internal medicine physician records in Louisiana
John G. Underwood, M.D. is one of 1,749 internal medicine physician records with a practice address in Louisiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 58% newer
- In a Medicare fileNo · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2023 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
218 internal medicine physician records list a practice address in Shreveport
They are 218 of the 8,660 NPPES records with a practice address in Shreveport, and 1,749 internal medicine physician records in Louisiana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,749 in Louisiana → Every provider in Shreveport → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pat Bass, M.D.Shreveport, LA 711061952321820
- Amanda Callegan-Poche', MDShreveport, LA 711061265829394
- Byron Jackson, MDShreveport, LA 711061821167263
- Patricio Lucio, MDShreveport, LA 711061245717842
- Thomas Trawick, M.D.Shreveport, LA 711061487652970
- Russell Tynes, MDShreveport, LA 711061851323810
- Gregory Benn, MD, MBBSShreveport, LA 711051700440617
- Mark BrownShreveport, LA 711051750344073
Common questions
What is John G. Underwood, M.D.'s NPI number?
John G. Underwood, M.D.'s National Provider Identifier (NPI) is 1619937802, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John G. Underwood, M.D. located?
The NPPES record lists a practice address at 9091 Ellerbe RD, Shreveport, LA, 71106. Phone: (318) 681-1630. Providers update this record themselves, so call before visiting.
How can I verify John G. Underwood, M.D.'s license?
NPPES lists Louisiana license number L03841, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.