Gregory Michael Singleton, M.D.
Psychiatry Physician · Louisville, KY
Gregory Michael Singleton, M.D. is a psychiatry physician with a practice address in Louisville, Kentucky, and NPI 1922052836, issued on May 22, 2006. Check the license (Kentucky 40043, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Gregory Michael Singleton
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 40043 KY
Self-reported in NPPES; status is on the state search - Practice location
- 401 E Chestnut St, Louisville, KY 40202
- Phone
- (502) 813-6627
- Enumerated
- May 22, 2006
- Record last updated
- Jan 29, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (502) 813-6650
- Medicaid IDs
- 64121114 KY
200855140 IN - Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 503 in Kentucky → Look up another NPI →
Also registered at 401 E Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Michael Singleton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 40043Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average psychiatry physician in 2024
706 Medicare Part D claims for 42 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Alprazolam54 claims
- Quetiapine Fumarate50 claims
- Diazepam37 claims
- Sertraline Hcl36 claims
- Aripiprazole33 claims
- Zolpidem Tartrate33 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.
Gregory Michael Singleton among 503 psychiatry physician records in Kentucky
Gregory Michael Singleton, M.D. is one of 503 psychiatry physician records with a practice address in Kentucky. 65% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2013 · 63% 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 Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Kentucky
There are 503 psychiatry physician records in Kentucky.
All 503 in Kentucky → Every provider in Louisville → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Rifaat Elmallakh, M.D.Louisville, KY 402021174595300
- Theodore Feldmann, M.D.Louisville, KY 402021912979154
- Barbara Fitzgerald, M.D.Louisville, KY 402021336111574
- Robert FriersonLouisville, KY 402021225000235
- Pauline Humphrey, M.D.Louisville, KY 402021699747873
- Paul Kensicki, MDLouisville, KY 402021851362040
- Clifford Kuhn, M.D.Louisville, KY 402021811969009
- Steven Lippmann, M.D.Louisville, KY 402021013989151
Common questions
What is Gregory Michael Singleton, M.D.'s NPI number?
Gregory Michael Singleton, M.D.'s National Provider Identifier (NPI) is 1922052836, issued on May 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Michael Singleton, M.D. located?
The NPPES record lists a practice address at 401 E Chestnut St, Louisville, KY, 40202. Phone: (502) 813-6627. Providers update this record themselves, so call before visiting.
How can I verify Gregory Michael Singleton, M.D.'s license?
NPPES lists Kentucky license number 40043, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Michael Singleton, M.D. prescribe under Medicare Part D?
In 2024, Gregory Michael Singleton, M.D. had 706 Medicare Part D claims for 42 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.