Harris Marshall Blackman, M.D.
Specialist · Marrero, LA
Harris Marshall Blackman, M.D. is a specialist with a practice address in Marrero, Louisiana, and NPI 1629041116, issued on Feb 7, 2006. Check the license (Louisiana 013299, as entered in NPPES) with the Louisiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Harris Marshall Blackman
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 013299 LA
Self-reported in NPPES; status is on the state search - Practice location
- 1111 Medical Center Blvd, Marrero, LA 70072
- Phone
- (504) 347-2141
- Enumerated
- Feb 7, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (504) 349-6555
- Medicaid ID
- 1308340 LA
- Entity
- Type 1 · individual
8 nearest specialist records → All 550 in Louisiana → Look up another NPI →
Also registered at 1111 Medical Center Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Harris Marshall Blackman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Louisiana board licenses this profession
Search for license 013299Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average specialist in 2024
16 Medicare Part D claims for 11 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.
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.
Harris Marshall Blackman among 550 specialist records in Louisiana
Harris Marshall Blackman, M.D. is one of 550 specialist records with a practice address in Louisiana. 36% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 44% newer
- In a Medicare fileYes · 36% of these records are
- In the CMS Doctors and Clinicians fileNo · 23% of these records are
- Record last updated2026 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 specialist records list a practice address in Marrero
They are 20 of the 1,117 NPPES records with a practice address in Marrero, and 550 specialist records in Louisiana.
All 550 in Louisiana → Every provider in Marrero → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Tamer Acikalin, M.D.Marrero, LA 700721578673141
- Richard Helman, M.D.Marrero, LA 700721689756421
- Sayyeda Jaffri, P.T.Marrero, LA 700721295833929
- Kenneth Kessler, M.D.Marrero, LA 700721063488849
- Suzette Killeen, M.D.Marrero, LA 700721699774935
- Akio Kitahama, M.D.Marrero, LA 700721427169473
- Juan LabadieMarrero, LA 700721972557676
- Owen Leftwich, M.D.Marrero, LA 700721588663819
Common questions
What is Harris Marshall Blackman, M.D.'s NPI number?
Harris Marshall Blackman, M.D.'s National Provider Identifier (NPI) is 1629041116, issued on Feb 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harris Marshall Blackman, M.D. located?
The NPPES record lists a practice address at 1111 Medical Center Blvd, Marrero, LA, 70072. Phone: (504) 347-2141. Providers update this record themselves, so call before visiting.
How can I verify Harris Marshall Blackman, M.D.'s license?
NPPES lists Louisiana license number 013299, as entered by the provider. Search the Louisiana board that licenses this profession; the NPPES record confirms identity only.
How much does Harris Marshall Blackman, M.D. prescribe under Medicare Part D?
In 2024, Harris Marshall Blackman, M.D. had 16 Medicare Part D claims for 11 beneficiaries; the average among specialist prescribers was 1,380. 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.