Mark A. Walker, MD
Family Medicine Physician · Houma, LA
Mark A. Walker, MD is a family medicine physician with a practice address in Houma, Louisiana, and NPI 1245389394, issued on Jan 9, 2007. Check the license (Louisiana 019391, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark A. Walker
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 019391 LA
Self-reported in NPPES; status is on the state search - Practice location
- 606 Liberty St, Houma, LA 70360
- Phone
- (985) 872-3000
- Enumerated
- Jan 9, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070810000575); may accept Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,728 in Louisiana → Look up another NPI →
Also registered at 606 Liberty St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Watkins, MDFamily Medicine Physician1902955073
Verify Mark A. Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 019391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average family medicine physician in 2024
4,711 Medicare Part D claims for 399 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 34 claims were for opioids.
Most prescribed
- Atorvastatin Calcium225 claims
- Levothyroxine Sodium210 claims
- Amlodipine Besylate199 claims
- Ozempic144 claims
- Metformin Hcl137 claims
- Azithromycin129 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: $15.33
1 payment: food and beverage; the largest payer was Pfizer Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Houma Family Practice Clinic ApmcHouma, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Walker among 1,728 family medicine physician records in Louisiana
Mark A. Walker, MD is one of 1,728 family 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 45% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1987 · median 2006 among the 1,201 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Houma
They are 20 of the 1,604 NPPES records with a practice address in Houma, and 1,728 family medicine physician records in Louisiana.
All 1,728 in Louisiana → Every provider in Houma → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Danielle Angeron, M.D.Houma, LA 703601508059536
- Kirk Dantin, MDHouma, LA 703601679622732
- Bruce Guidry, M.D.Houma, LA 703601356300727
- Andre Guidry, MDHouma, LA 703601780734475
- Richard Haydel, M.D.Houma, LA 703601578658555
- Scott Haydel, M.D.Houma, LA 703601720173719
- Brian Matherne, M.D.Houma, LA 703601437118890
- Nicole McKee, M.D.Houma, LA 703601043279482
Common questions
What is Mark A. Walker, MD's NPI number?
Mark A. Walker, MD's National Provider Identifier (NPI) is 1245389394, issued on Jan 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Walker, MD located?
The NPPES record lists a practice address at 606 Liberty St, Houma, LA, 70360. Phone: (985) 872-3000. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Walker, MD's license?
NPPES lists Louisiana license number 019391, 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 Mark A. Walker, MD prescribe under Medicare Part D?
In 2024, Mark A. Walker, MD had 4,711 Medicare Part D claims for 399 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.