Nathalie K. Diethrich, PMHNP
Psychiatric/Mental Health Nurse Practitioner · Decatur, IL
Nathalie K. Diethrich, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Decatur, Illinois, and NPI 1104374727, issued on Sep 12, 2016. Check the license (Illinois 277001744, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nathalie K. Diethrich
- Credential
- PMHNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- 277001744 IL
209.014716 IL
377001689 IL
Self-reported in NPPES; status is on the state search - Practice location
- 151 N Main St, Decatur, IL 62523
- Phone
- (217) 362-6262
- Enumerated
- Sep 12, 2016
- Record last updated
- Sep 30, 2025
- Fax
- (217) 362-6290
- Medicare enrollment
- Enrolled (PECOS I20170410001898); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,530 in Illinois → Look up another NPI →
Also registered at 151 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erica AgrallLicensed Practical Nurse1639527070
- Rebecca Armstrong, M.A., LPCMental Health Counselor1134490378
- Colleen AtheyLicensed Practical Nurse1770996217
- Stuart Atkinson, LPCProfessional Counselor1720829476
- Janet BairdProfessional Counselor1356566228
- Carleigh BakerClinical Social Worker1053261248
Verify Nathalie K. Diethrich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 277001744Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average psychiatric/mental health nurse practitioner in 2024
3,384 Medicare Part D claims for 142 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Quetiapine Fumarate342 claims
- Clonidine Hcl167 claims
- Prazosin Hcl150 claims
- Benztropine Mesylate147 claims
- Hydroxyzine Hcl137 claims
- Haloperidol Decanoate135 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: $8,534.04
35 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 23,362 providers of this specialty with any payment received $1,027.77 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
- Heritage Behavioral Health Center, Inc.Decatur, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathalie K. Diethrich among 1,530 psychiatric/mental health nurse practitioner records in Illinois
Nathalie K. Diethrich, PMHNP is one of 1,530 psychiatric/mental health nurse practitioner records with a practice address in Illinois. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 20% of them.
- NPI issued2016 · 20% of these records are older, 76% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2006 · median 2021 among the 917 with a school on file
- Record last updated2025 · 17% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Illinois
There are 1,530 psychiatric/mental health nurse practitioner records in Illinois.
All 1,530 in Illinois → Every provider in Decatur → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Ashley Garner, DNPDecatur, IL 625231205309267
- Nakita Cook, FNPDecatur, IL 625211710496021
- Mary CrislerDecatur, IL 625211063836450
- Tarsheka Green, PMHNP-BCDecatur, IL 625261053299206
- Chandra Pierson-Rye, DNP FNP-BC PMHNP-BCDecatur, IL 625261457898934
- Kathleen Pritchett, PADecatur, IL 625261629585237
- Ellen Mouser, PMHNPRaymond, IL 625601003238668
- Macy CollinsShelbyville, IL 625651215713631
Common questions
What is Nathalie K. Diethrich, PMHNP's NPI number?
Nathalie K. Diethrich, PMHNP's National Provider Identifier (NPI) is 1104374727, issued on Sep 12, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Nathalie K. Diethrich, PMHNP located?
The NPPES record lists a practice address at 151 N Main St, Decatur, IL, 62523. Phone: (217) 362-6262. Providers update this record themselves, so call before visiting.
How can I verify Nathalie K. Diethrich, PMHNP's license?
NPPES lists Illinois license number 277001744, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Nathalie K. Diethrich, PMHNP prescribe under Medicare Part D?
In 2024, Nathalie K. Diethrich, PMHNP had 3,384 Medicare Part D claims for 142 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.