Walter Michael Bortz, M.D.
Internal Medicine Physician · Marrero, LA
Walter Michael Bortz, M.D. is an internal medicine physician with a practice address in Marrero, Louisiana, and NPI 1225012016, issued on Dec 5, 2005. Check the license (Louisiana 307621, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Walter Michael Bortz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 307621 LA
G83310 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Medical Center Blvd, Marrero, LA 70072
- Phone
- (504) 349-1656
- Enumerated
- Dec 5, 2005
- Record last updated
- Jan 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (504) 349-1933
- Medicare enrollment
- Enrolled (PECOS I20180611001016); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,749 in Louisiana → Look up another NPI →
Also registered at 1101 Medical Center Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Latoya Adams, APRNNurse Practitioner1548067085
- Eboni Addison, MSN APRN FNP-CFamily Nurse Practitioner1679192983
- Stephen Agans, MD/MPHUndersea and Hyperbaric Medicine (Preventive Medicine) Physician1730377607
- Nathan Aleger, MDInternal Medicine Physician1417652546
Verify Walter Michael Bortz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 307621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
434 Medicare Part D claims for 163 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Furosemide32 claims
- Metoprolol Succinate28 claims
- Pantoprazole Sodium26 claims
- Amiodarone Hcl25 claims
- Amlodipine Besylate23 claims
- Atorvastatin Calcium18 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.
The MIPS final score for 2023 (Medicare payment program): 96.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.80
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- New Orleans Physician Services IncMarrero, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter Michael Bortz among 1,749 internal medicine physician records in Louisiana
Walter Michael Bortz, 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. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1993 · median 2008 among the 1,216 with a school on file
- Record last updated2019 · 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).
46 internal medicine physician records list a practice address in Marrero
They are 46 of the 1,117 NPPES records with a practice address in Marrero, and 1,749 internal medicine physician records in Louisiana.
All 1,749 in Louisiana → Every provider in Marrero → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Scott Acosta, MDMarrero, LA 700721023018199
- Lauren Barial, M.D.Marrero, LA 700721699758821
- Alan Bowers, MDMarrero, LA 700721306832886
- Craig Ehrensing, MDMarrero, LA 700721538127618
- Constance Gistand, MDMarrero, LA 700721225014327
- Shaunda Jones, M.D.Marrero, LA 700721891734190
- Yvens Laborde, MDMarrero, LA 700721891744264
- Thomas Melancon, M.D.Marrero, LA 700721811989197
Common questions
What is Walter Michael Bortz, M.D.'s NPI number?
Walter Michael Bortz, M.D.'s National Provider Identifier (NPI) is 1225012016, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Walter Michael Bortz, M.D. located?
The NPPES record lists a practice address at 1101 Medical Center Blvd, Marrero, LA, 70072. Phone: (504) 349-1656. Providers update this record themselves, so call before visiting.
How can I verify Walter Michael Bortz, M.D.'s license?
NPPES lists Louisiana license number 307621, 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 Walter Michael Bortz, M.D. prescribe under Medicare Part D?
In 2024, Walter Michael Bortz, M.D. had 434 Medicare Part D claims for 163 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Walter Michael Bortz, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.