Calvert Glendon Warren, MD
Psychiatry Physician · Greenville, SC
Calvert Glendon Warren, MD is a psychiatry physician with a practice address in Greenville, South Carolina, and NPI 1083727846, issued on Aug 16, 2006. Check the license (South Carolina 36535, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Calvert Glendon Warren
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 36535 SC
188710-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 701 Grove RD, Greenville, SC 29605
- Phone
- (864) 455-8431
- Enumerated
- Aug 16, 2006
- Record last updated
- Sep 30, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (864) 455-8981
- Medicaid ID
- 01499903 NY
- Medicare enrollment
- Enrolled (PECOS I20140703001429); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 1990
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 891 in South Carolina → Look up another NPI →
Also registered at 701 Grove RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brian Allen, D.O.Hospitalist Physician1184851495
- Dawn Allen, NNPCritical Care Neonatal Nurse Practitioner1164836227
Verify Calvert Glendon Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 36535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average psychiatry physician in 2024
333 Medicare Part D claims for 29 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Invega Sustenna35 claims
- Hydroxyzine Hcl31 claims
- Olanzapine28 claims
- Lorazepam27 claims
- Metformin Hcl23 claims
- Valproic Acid18 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: $17.28
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 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 Carolina Dept OF Mental Health Accounting OfficeAnderson, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Calvert Glendon Warren among 891 psychiatry physician records in South Carolina
Calvert Glendon Warren, 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
- Graduated1990 · median 2007 among the 365 with a school on file
- Record last updated2020 · 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 Greenville → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jack Bonner, M.D.Greenville, SC 296051336199751
- Jeffrey Craddock, M.D.Greenville, SC 296051174578538
- Violetta Czepowicz, M.D.Greenville, SC 296051356325435
- Louis Dolinar, M.D.Greenville, SC 296051730126962
- Benjamin Griffeth, MDGreenville, SC 296051023019320
- Wade Harris, M.D.Greenville, SC 296051972552040
- Kisha Hartwick, MDGreenville, SC 296051770553695
- Magnus Lakovics, MDGreenville, SC 296051861490963
Common questions
What is Calvert Glendon Warren, MD's NPI number?
Calvert Glendon Warren, MD's National Provider Identifier (NPI) is 1083727846, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Calvert Glendon Warren, MD located?
The NPPES record lists a practice address at 701 Grove RD, Greenville, SC, 29605. Phone: (864) 455-8431. Providers update this record themselves, so call before visiting.
How can I verify Calvert Glendon Warren, MD's license?
NPPES lists South Carolina license number 36535, 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 Calvert Glendon Warren, MD prescribe under Medicare Part D?
In 2024, Calvert Glendon Warren, MD had 333 Medicare Part D claims for 29 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.