Gretchen Kemner
NPI 1598234726 · Psychiatric/Mental Health Nurse Practitioner · Chicago, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Kemner is a Psychiatric/Mental Health Nurse Practitioner provider in Chicago, IL (NPI 1598234726).
Provider details
- NPI number
- 1598234726
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 209.018351 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 97 | 13 |
| Risperidone | 86 | — |
| Quetiapine Fumarate | 85 | — |
| Paliperidone Palmitatebrand: Invega Sustenna | 83 | — |
| Clozapine | 77 | — |
| Sertraline Hcl | 75 | 11 |
| Aripiprazole | 65 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$658 across 30 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-11-16
- Last updated
- 2018-11-16
Frequently asked questions
- What is Gretchen Kemner's NPI number?
- Gretchen Kemner's National Provider Identifier (NPI) is 1598234726, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Kemner's specialty?
- Gretchen Kemner is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gretchen Kemner located?
- Gretchen Kemner's practice location on file with NPPES is 734 W 47th St, Chicago, IL 60609-4411.
- What is Gretchen Kemner's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Kemner is (773) 388-1600.
- Does Gretchen Kemner accept Medicare?
- Gretchen Kemner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Kemner's NPI active?
- Yes — Gretchen Kemner's NPI (1598234726) is active in the NPPES registry as of the last update on 2018-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.