Riley Diane Machal, M.D.
Psychiatry Physician · Omaha, NE
Riley Diane Machal, M.D. is a psychiatry physician with a practice address in Omaha, Nebraska, and NPI 1891141313, issued on May 13, 2016. Check the license (Nebraska 32494, as entered in NPPES) on the Nebraska Board of Medicine and Surgery; the Medicare figures below come from public CMS files.
- Name
- Riley Diane Machal
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 32494 NE
Self-reported in NPPES; status is on the state search - Practice location
- 42ND @ Dewey St, Omaha, NE 68198
- Phone
- (402) 552-6007
- Enumerated
- May 13, 2016
- Record last updated
- Oct 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200814001293); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 260 in Nebraska → Look up another NPI →
Also registered at 42ND @ Dewey St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Aksamit, PACPhysician Assistant1013331925
- Melissa Allison, PA-CPhysician Assistant1245861962
- Troyia AndersonNurse Practitioner1861021099
- Andrew Baumgartner, M.D.Psychiatry Physician1144603515
- Julie Bierman, PLMHPMental Health Counselor1942820527
- Zoe Feilner, PA-CPhysician Assistant1043801285
Verify Riley Diane Machal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNebraska Board of Medicine and Surgery
Search for license 32494Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average psychiatry physician in 2024
726 Medicare Part D claims for 38 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Clozapine95 claims
- Quetiapine Fumarate34 claims
- Bupropion Xl32 claims
- Bupropion Hcl Sr28 claims
- Lamotrigine28 claims
- Metformin Hcl28 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
- Unmc PhysiciansOmaha, NE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Riley Diane Machal among 260 psychiatry physician records in Nebraska
Riley Diane Machal, M.D. is one of 260 psychiatry physician records with a practice address in Nebraska. 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 2016, is newer than 66% of them.
- NPI issued2016 · 66% of these records are older, 29% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 44% of these records are
- Graduated2016 · median 2006 among the 113 with a school on file
- Record last updated2020 · 58% 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 Nebraska practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Nebraska
There are 260 psychiatry physician records in Nebraska.
All 260 in Nebraska → Every provider in Omaha → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Susan Boust, MDOmaha, NE 681981699732057
- Elizabeth Dahl, MDOmaha, NE 681981538126875
- Matthew Egbert, MDOmaha, NE 681981366490880
- Mark Fleisher, MDOmaha, NE 681981568410322
- Carl Greiner, MDOmaha, NE 681981033167812
- Sharon Hammer, MDOmaha, NE 681981386673259
- Chanel Heermann, M.D.Omaha, NE 681981043266562
- Stacey Herbster, M.D.Omaha, NE 681981457323925
Common questions
What is Riley Diane Machal, M.D.'s NPI number?
Riley Diane Machal, M.D.'s National Provider Identifier (NPI) is 1891141313, issued on May 13, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Riley Diane Machal, M.D. located?
The NPPES record lists a practice address at 42ND @ Dewey St, Omaha, NE, 68198. Phone: (402) 552-6007. Providers update this record themselves, so call before visiting.
How can I verify Riley Diane Machal, M.D.'s license?
NPPES lists Nebraska license number 32494, as entered by the provider. Search the Nebraska Board of Medicine and Surgery at https://www.nebraska.gov/LISSearch/search.cgi. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Riley Diane Machal, M.D. prescribe under Medicare Part D?
In 2024, Riley Diane Machal, M.D. had 726 Medicare Part D claims for 38 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.