Andrew Zachary Williams, M.D.
Child & Adolescent Psychiatry Physician · New Orleans, LA
Andrew Zachary Williams, M.D. is a child & adolescent psychiatry physician with a practice address in New Orleans, Louisiana, and NPI 1255479903, issued on Feb 2, 2007. Check the license (Louisiana 200420, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Andrew Zachary Williams
- Credential
- M.D.
- Primary taxonomy
- Child & Adolescent Psychiatry Physician 2084P0804X
- License number
- 200420 LA
Self-reported in NPPES; status is on the state search - Practice location
- 3450 Chestnut St, New Orleans, LA 70115
- Phone
- (504) 412-1580
- Enumerated
- Feb 2, 2007
- Record last updated
- Oct 17, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (504) 412-1530
- Medicaid ID
- 1063151 LA
- Medicare enrollment
- Enrolled (PECOS I20081029000598); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest child & adolescent psychiatry physician records → All 92 in Louisiana → Look up another NPI →
Also registered at 3450 Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- D'Andrea BiagasProfessional Counselor1619129376
- Kristin Callahan, PH.D.Psychologist1518270107
- Richard Costa, PSY DPsychologist1275544793
- Kate CunoPsychologist1235498031
- Christina Danko, M.A.Student in an Organized Health Care Education/Training Program1962688416
- Juliet Dinkins, M.A.Student in an Organized Health Care Education/Training Program1457581209
Verify Andrew Zachary Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 200420Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average child & adolescent psychiatry physician in 2024
320 Medicare Part D claims for 30 beneficiaries, against an average of 504 among the 3,545 providers of this specialty who prescribed in Part D.
Most prescribed
- Trazodone Hcl40 claims
- Sertraline Hcl24 claims
- Duloxetine Hcl21 claims
- Aripiprazole18 claims
- Bupropion Xl14 claims
- Clonazepam14 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: $157.04
7 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 1,578 providers of this specialty with any payment received $1,427.96 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
- South Louisiana Medical AssociatesHouma, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Zachary Williams among 92 child & adolescent psychiatry physician records in Louisiana
Andrew Zachary Williams, M.D. is one of 92 child & adolescent psychiatry physician records with a practice address in Louisiana. 72% 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 15% of them.
- NPI issued2007 · 15% of these records are older, 57% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated1996 · median 2010 among the 27 with a school on file
- Record last updated2008 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0804X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Child & Adolescent Psychiatry Physician providers in Louisiana
There are 92 child & adolescent psychiatry physician records in Louisiana.
All 92 in Louisiana → Every provider in New Orleans → Child & Adolescent Psychiatry Physician nationwide →
The 8 child & adolescent psychiatry physician records with the nearest ZIP codes
- Stephen Cochran, M.D.New Orleans, LA 701151326188772
- Colleen Hagemann, MDNew Orleans, LA 701151609190636
- Naomi Mann, MDNew Orleans, LA 701151093090441
- Heitor Perdigao, MDNew Orleans, LA 701151134209331
- Aisha Phillipson, M.D.New Orleans, LA 701141659522639
- Bruce Lovelace, MDNew Orleans, LA 701171164636775
- Fei Chen, D.O.New Orleans, LA 701121902287360
- Katherine CowheyNew Orleans, LA 701121548767247
Common questions
What is Andrew Zachary Williams, M.D.'s NPI number?
Andrew Zachary Williams, M.D.'s National Provider Identifier (NPI) is 1255479903, issued on Feb 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Zachary Williams, M.D. located?
The NPPES record lists a practice address at 3450 Chestnut St, New Orleans, LA, 70115. Phone: (504) 412-1580. Providers update this record themselves, so call before visiting.
How can I verify Andrew Zachary Williams, M.D.'s license?
NPPES lists Louisiana license number 200420, 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 Andrew Zachary Williams, M.D. prescribe under Medicare Part D?
In 2024, Andrew Zachary Williams, M.D. had 320 Medicare Part D claims for 30 beneficiaries; the average among child & adolescent psychiatry physician prescribers was 504. 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.