William G. Clark, M.D.
Geriatric Psychiatry Physician · Laurel, MS
William G. Clark, M.D. is a geriatric psychiatry physician with a practice address in Laurel, Mississippi, and NPI 1518987478, issued on Jul 20, 2006. Check the license (Mississippi 15708, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- William G. Clark
- Credential
- M.D.
- Primary taxonomy
- Geriatric Psychiatry Physician 2084P0805X
- License number
- 15708 MS
Self-reported in NPPES; status is on the state search - Practice location
- 1603 Old Amy RD, Laurel, MS 39440
- Phone
- (601) 428-7100
- Enumerated
- Jul 20, 2006
- Record last updated
- Jul 8, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (601) 428-7159
- Medicaid ID
- 00118813 MS
- Entity
- Type 1 · individual
1 nearest geriatric psychiatry physician record → All 2 in Mississippi → Look up another NPI →
Verify William G. Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 15708Check 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 geriatric psychiatry physician in 2024
17 Medicare Part D claims, against an average of 1,485 among the 473 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Geriatric Psychiatry Physician providers in Mississippi
There are 2 geriatric psychiatry physician records in Mississippi.
All 2 in Mississippi → Every provider in Laurel → Geriatric Psychiatry Physician nationwide →
The 1 geriatric psychiatry physician record with the nearest ZIP codes
- William Cook, M.D.Jackson, MS 392111356440721
Common questions
What is William G. Clark, M.D.'s NPI number?
William G. Clark, M.D.'s National Provider Identifier (NPI) is 1518987478, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William G. Clark, M.D. located?
The NPPES record lists a practice address at 1603 Old Amy RD, Laurel, MS, 39440. Phone: (601) 428-7100. Providers update this record themselves, so call before visiting.
How can I verify William G. Clark, M.D.'s license?
NPPES lists Mississippi license number 15708, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William G. Clark, M.D. prescribe under Medicare Part D?
In 2024, William G. Clark, M.D. had 17 Medicare Part D claims; the average among geriatric psychiatry physician prescribers was 1,485. 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.