Mary Elizabeth Holzer
Internal Medicine Physician · Covington, LA
Mary Elizabeth Holzer is an internal medicine physician with a practice address in Covington, Louisiana, and NPI 1437546116, issued on Apr 21, 2015. Check the license (Louisiana 312613, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Elizabeth Holzer
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 312613 LA
Self-reported in NPPES; status is on the state search - Practice location
- 130 Lakeview Cir Apt 304, Covington, LA 70433
- Phone
- (985) 892-6858
- Enumerated
- Apr 21, 2015
- Record last updated
- Feb 13, 2023
- Medicaid ID
- 2389904 LA
- Medicare enrollment
- Enrolled (PECOS I20190917001102); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,749 in Louisiana → Look up another NPI →
Verify Mary Elizabeth Holzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 312613Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,566 Medicare Part D claims for 356 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Atorvastatin Calcium152 claims
- Levothyroxine Sodium111 claims
- Amlodipine Besylate95 claims
- Lisinopril89 claims
- Hydrochlorothiazide73 claims
- Rosuvastatin Calcium67 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.
Industry payments in 2024: $293.31
16 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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
- East Jefferson Physicians Group LLCCovington, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Elizabeth Holzer among 1,749 internal medicine physician records in Louisiana
Mary Elizabeth Holzer 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 2015, is newer than 68% of them.
- NPI issued2015 · 68% of these records are older, 28% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2015 · median 2008 among the 1,216 with a school on file
- 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).
62 internal medicine physician records list a practice address in Covington
They are 62 of the 1,868 NPPES records with a practice address in Covington, and 1,749 internal medicine physician records in Louisiana.
All 1,749 in Louisiana → Every provider in Covington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Barfield, MDCovington, LA 704331427014612
- Joseph Bobrowski, M.D.Covington, LA 704331609870013
- Patricia Guidry, MDCovington, LA 704331003819152
- Merrill Laurent, MDCovington, LA 704331083673917
- Tania Levi, M.D.Covington, LA 704331629058813
- Rachael Murphy, M.D.Covington, LA 704331528039781
- Paul Parker, MDCovington, LA 704331659348647
- James Robinson, M.D.Covington, LA 704331275513483
Common questions
What is Mary Elizabeth Holzer's NPI number?
Mary Elizabeth Holzer's National Provider Identifier (NPI) is 1437546116, issued on Apr 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Mary Elizabeth Holzer located?
The NPPES record lists a practice address at 130 Lakeview Cir Apt 304, Covington, LA, 70433. Phone: (985) 892-6858. Providers update this record themselves, so call before visiting.
How can I verify Mary Elizabeth Holzer's license?
NPPES lists Louisiana license number 312613, 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 Mary Elizabeth Holzer prescribe under Medicare Part D?
In 2024, Mary Elizabeth Holzer had 2,566 Medicare Part D claims for 356 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.