William Dreas Lambert, MD
Psychiatry Physician · Greenwood, SC
William Dreas Lambert, MD is a psychiatry physician with a practice address in Greenwood, South Carolina, and NPI 1285669507, issued on Jul 12, 2006. Check the license (South Carolina 36533, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Dreas Lambert
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 36533 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1325 Spring St, Greenwood, SC 29646
- Phone
- (864) 725-4398
- Enumerated
- Jul 12, 2006
- Record last updated
- Dec 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (864) 725-4399
- Medicare enrollment
- Enrolled (PECOS I20140409000885); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1989
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 891 in South Carolina → Look up another NPI →
Also registered at 1325 Spring St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tinu Abraham, MDInternal Medicine Physician1194354399
- Chandler Adams, PA-CPhysician Assistant1205465820
- Matthew Adams, MDFamily Medicine Physician1467136135
- Kelly Addy, NPFamily Nurse Practitioner1790215291
- Sunil Agarwal, MDPain Medicine (Anesthesiology) Physician1780113506
- Solomon Amemasor, DODiagnostic Radiology Physician1285128892
Verify William Dreas Lambert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 36533Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average psychiatry physician in 2024
839 Medicare Part D claims for 49 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Clonazepam114 claims
- Lorazepam74 claims
- Trazodone Hcl67 claims
- Alprazolam66 claims
- Duloxetine Hcl52 claims
- Escitalopram Oxalate42 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.
The MIPS final score for 2023 (Medicare payment program): 96.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Self Medical GroupGreenwood, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Dreas Lambert among 891 psychiatry physician records in South Carolina
William Dreas Lambert, MD is one of 891 psychiatry physician records with a practice address in South Carolina. 67% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 63% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated1989 · median 2007 among the 365 with a school on file
- Record last updated2021 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in South Carolina
There are 891 psychiatry physician records in South Carolina.
All 891 in South Carolina → Every provider in Greenwood → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Mallikarjuna Bagewadi Ellur, M.D.,Greenwood, SC 296461790125615
- Claben Barraca, M.D.Greenwood, SC 296461386674620
- Emile Barrouk, MDGreenwood, SC 296461346479847
- Theresa Bishop, M.D.Greenwood, SC 296461659304483
- Emily Cullen, MDGreenwood, SC 296461598026601
- Andrew Hedgepath, M.D.Greenwood, SC 296461538275607
- Melissa Maceda, M.D.Greenwood, SC 296461326078676
- Kunal Patel, M.D.Greenwood, SC 296461033408612
Common questions
What is William Dreas Lambert, MD's NPI number?
William Dreas Lambert, MD's National Provider Identifier (NPI) is 1285669507, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Dreas Lambert, MD located?
The NPPES record lists a practice address at 1325 Spring St, Greenwood, SC, 29646. Phone: (864) 725-4398. Providers update this record themselves, so call before visiting.
How can I verify William Dreas Lambert, MD's license?
NPPES lists South Carolina license number 36533, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Dreas Lambert, MD prescribe under Medicare Part D?
In 2024, William Dreas Lambert, MD had 839 Medicare Part D claims for 49 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is William Dreas Lambert, MD's MIPS final score?
The 2023 MIPS final score is 96.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.