William Mark Caldwell, M.D.
General Practice Physician · Metairie, LA
William Mark Caldwell, M.D. is a general practice physician with a practice address in Metairie, Louisiana, and NPI 1598082083, issued on Apr 23, 2010. Check the license (Louisiana 19305, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Mark Caldwell
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 19305 LA
Self-reported in NPPES; status is on the state search - Practice location
- 3901 Houma Blvd, Metairie, LA 70006
- Phone
- (504) 455-5371
- Enumerated
- Apr 23, 2010
- Record last updated
- Apr 23, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 145 in Louisiana → Look up another NPI →
Also registered at 3901 Houma Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Carole Cox, LDN RD CDERegistered Dietitian1134199185
- Raymond Decorte, MDSurgery Physician1396859880
- Bryce Leblanc, M.D.Pediatric Otolaryngology Physician1396705497
Verify William Mark Caldwell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 19305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average general practice physician in 2024
74 Medicare Part D claims for 18 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 32 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen30 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: $152,925.00
85 payments; by number, the most common kind was consulting fee; the largest payer was Csl Plasma Inc. The 4,259 providers of this specialty with any payment received $1,273.40 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.
William Mark Caldwell among 145 general practice physician records in Louisiana
William Mark Caldwell, M.D. is one of 145 general practice physician records with a practice address in Louisiana. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 66% of them.
- NPI issued2010 · 66% of these records are older, 28% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · 37% of these records are
- Record last updated2010 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Louisiana
There are 145 general practice physician records in Louisiana.
All 145 in Louisiana → Every provider in Metairie → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Shannon Ceasar, M.D.Metairie, LA 700061275748675
- Diane Mayer, MDMetairie, LA 700061972678019
- Philip Patten, MD, MPHMetairie, LA 700061366609992
- Andrew GruezkeMetairie, LA 700051669714440
- Robert Kelly, M.D.Metairie, LA 700051821098393
- Herbert Haydel, MDMetairie, LA 700031194205864
- Pamela Picnot, M.D.Metairie, LA 700021922314467
- Sarah Schwertner, MDMetairie, LA 700021992062897
Common questions
What is William Mark Caldwell, M.D.'s NPI number?
William Mark Caldwell, M.D.'s National Provider Identifier (NPI) is 1598082083, issued on Apr 23, 2010. An NPI identifies a provider in billing; it is not a license.
Where is William Mark Caldwell, M.D. located?
The NPPES record lists a practice address at 3901 Houma Blvd, Metairie, LA, 70006. Phone: (504) 455-5371. Providers update this record themselves, so call before visiting.
How can I verify William Mark Caldwell, M.D.'s license?
NPPES lists Louisiana license number 19305, 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 William Mark Caldwell, M.D. prescribe under Medicare Part D?
In 2024, William Mark Caldwell, M.D. had 74 Medicare Part D claims for 18 beneficiaries; the average among general practice physician prescribers was 3,030. 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.