Physician Profile
Unclaimed ProfileAbout HAHN
Gregory Charles Hahn, DO practices psychiatry in Merriam, KS. Medicare claims data shows Gregory provided 867 services to 482 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (913) 663-2642
- Email not available
Practice Locations
9100 W 74TH ST
Merriam, KS 66204
Procedures Most Often Billed to Medicare
867 services · 482 patients · 9 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
50 |
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
34 |
| Psychotherapy with evaluation and management visit, 30 minutes | Treatment | 90833 |
23 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
264 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
259 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
70 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
66 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
61 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
40 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychiatry specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other psychiatry specialists in Merriam 3
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2007 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Psychiatric diagnostic evaluation with medical services 8
Providers in KS who bill this service to Medicare most often.
Common questions
What is Dr. Hahn's specialty?
Dr. Hahn is a psychiatry in Merriam, KS. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PSYCHIATRY”.
NPI registry
Where can I find Dr. Hahn?
Dr. Hahn is listed at 9100 W 74TH ST, Merriam, KS 66204. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Hahn?
The number on file is (913) 663-2642. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Hahn?
Dr. Hahn's National Provider Identifier is 1972702215. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Hahn's medical education?
Dr. Hahn attended Other, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Hahn have?
Dr. Hahn has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Hahn known for?
According to Medicare billing data, Dr. Hahn provides treatments such as psychiatric diagnostic evaluation with medical services and psychotherapy with evaluation and management visit, 30 minutes, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Hahn's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hahn. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.