Gregory Charles Hahn, DO
Psychiatry Physician · Merriam, KS
Gregory Charles Hahn, DO is a psychiatry physician with a practice address in Merriam, Kansas, and NPI 1972702215, issued on Jul 17, 2007. Check the license (Kansas 05-39922, as entered in NPPES) on the Kansas State Board of Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Gregory Charles Hahn
- Credential
- DO
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 05-39922 KS
Self-reported in NPPES; status is on the state search - Practice location
- 9100 W 74TH St, Merriam, KS 66204
- Phone
- (913) 663-2642
- Enumerated
- Jul 17, 2007
- Record last updated
- Sep 5, 2025
- Fax
- (913) 632-2696
- Medicare enrollment
- Enrolled (PECOS I20170804000381); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 410 in Kansas → Look up another NPI →
Also registered at 9100 W 74TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wilberforce AfuyaFamily Nurse Practitioner1518673367
- Seth AtchisonEmergency Medicine Physician1407397615
- Oluwatise Babatope-OjoBehavior Technician1740129782
- Kerry Beck, RNRegistered Nurse1194656900
- Blair BeltzEmergency Registered Nurse1982590980
- Corina BissonnetteBehavior Technician1922968312
Verify Gregory Charles Hahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKansas State Board of Healing Arts
Search for license 05-39922Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.8 times the Medicare Part D claims of the average psychiatry physician in 2024
3,797 Medicare Part D claims for 278 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Clonazepam326 claims
- Trazodone Hcl271 claims
- Quetiapine Fumarate244 claims
- Duloxetine Hcl184 claims
- Bupropion Xl146 claims
- Mirtazapine143 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.
Bills Medicare through one group practice
- Shawnee Mission Medical Center IncMerriam, KS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Charles Hahn among 410 psychiatry physician records in Kansas
Gregory Charles Hahn, DO is one of 410 psychiatry physician records with a practice address in Kansas. 60% 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 43% of them.
- NPI issued2007 · 43% of these records are older, 44% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileYes · 37% of these records are
- Graduated2007 · median 2005 among the 150 with a school on file
- Record last updated2025 · 51% 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 Kansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 psychiatry physician records list a practice address in Merriam
They are 5 of the 547 NPPES records with a practice address in Merriam, and 410 psychiatry physician records in Kansas.
All 410 in Kansas → Every provider in Merriam → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Kanakam Dileepan, M.D.Shawnee Mission, KS 662041558360578
- Beverley James, M.D.Overland Park, KS 662041043379522
- Piyushkumar Jani, M.D.Merriam, KS 662041346683455
- Mariana Mack, MDMerriam, KS 662041649226622
- Sherif Ragab, MBBCHMerriam, KS 662041336308220
- Umang Shah, M.D., M.P.H.Merriam, KS 662041942732086
- Syed Mohiuddin, M.D.Shawnee, KS 662031508937350
- Walter Ricci, M.D.Fairway, KS 662051306093059
Common questions
What is Gregory Charles Hahn, DO's NPI number?
Gregory Charles Hahn, DO's National Provider Identifier (NPI) is 1972702215, issued on Jul 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Charles Hahn, DO located?
The NPPES record lists a practice address at 9100 W 74TH St, Merriam, KS, 66204. Phone: (913) 663-2642. Providers update this record themselves, so call before visiting.
How can I verify Gregory Charles Hahn, DO's license?
NPPES lists Kansas license number 05-39922, as entered by the provider. Search the Kansas State Board of Healing Arts at https://www.ksbha.ks.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Charles Hahn, DO prescribe under Medicare Part D?
In 2024, Gregory Charles Hahn, DO had 3,797 Medicare Part D claims for 278 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.