John Carlo Mercado, MD
Emergency Medicine Physician · Baton Rouge, LA
John Carlo Mercado, MD is an emergency medicine physician with a practice address in Baton Rouge, Louisiana, and NPI 1861889495, issued on Apr 21, 2015. Check the license (Louisiana 308621, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Carlo Mercado
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 308621 LA
80153 GA
Self-reported in NPPES; status is on the state search - Practice location
- 5000 Hennessy Blvd, Baton Rouge, LA 70808
- Phone
- (225) 765-6565
- Enumerated
- Apr 21, 2015
- Record last updated
- May 23, 2024
- Medicare enrollment
- Enrolled (PECOS I20180720002778); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,000 in Louisiana → Look up another NPI →
Also registered at 5000 Hennessy Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jose Aguayo Herrera, MDHospitalist Physician1205569548
- Shees AhmedHospitalist Physician1437853579
Verify John Carlo Mercado in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 308621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average emergency medicine physician in 2024
227 Medicare Part D claims for 134 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Ibuprofen18 claims
- Hydrocodone-Acetaminophen16 claims
- Albuterol Sulfate Hfa14 claims
- Prednisone14 claims
- Ciprofloxacin Hcl12 claims
- Methocarbamol12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Belle Chasse Emergency Group LLCTerrytown, LA
- Kenner Emergency Group LLCKenner, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Carlo Mercado among 1,000 emergency medicine physician records in Louisiana
John Carlo Mercado, MD is one of 1,000 emergency medicine physician records with a practice address in Louisiana. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 72% of them.
- NPI issued2015 · 72% of these records are older, 24% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2015 · median 2010 among the 653 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
175 emergency medicine physician records list a practice address in Baton Rouge
They are 175 of the 12,526 NPPES records with a practice address in Baton Rouge, and 1,000 emergency medicine physician records in Louisiana.
All 1,000 in Louisiana → Every provider in Baton Rouge → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rohit Adi, MDBaton Rouge, LA 708081912012444
- Terence Alost, M.D.Baton Rouge, LA 708081013974724
- Wesley Blocker, MDBaton Rouge, LA 708081982717450
- Gerard Broussard, MDBaton Rouge, LA 708081720048226
- Ronald Coe, MDBaton Rouge, LA 708081174545537
- Dan Godbee, M.D.Baton Rouge, LA 708081578505277
- Keith Hodge, MDBaton Rouge, LA 708081962515452
- Stephen Hosea, MDBaton Rouge, LA 708081790890226
Common questions
What is John Carlo Mercado, MD's NPI number?
John Carlo Mercado, MD's National Provider Identifier (NPI) is 1861889495, issued on Apr 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is John Carlo Mercado, MD located?
The NPPES record lists a practice address at 5000 Hennessy Blvd, Baton Rouge, LA, 70808. Phone: (225) 765-6565. Providers update this record themselves, so call before visiting.
How can I verify John Carlo Mercado, MD's license?
NPPES lists Louisiana license number 308621, 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.
How much does John Carlo Mercado, MD prescribe under Medicare Part D?
In 2024, John Carlo Mercado, MD had 227 Medicare Part D claims for 134 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions 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.