Mark Diercks, M.D.
NPI 1134283567 · Psychiatry Physician · Omaha, NE
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Diercks, M.D. is a Psychiatry Physician provider in Omaha, NE (NPI 1134283567).
Provider details
- NPI number
- 1134283567
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16137 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
185 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 139 | $72 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 22 | $105 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 12 | $160 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 12 | $82 |
Typical Medicare-allowed amounts for these services range $72–$160 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 119 | 36 |
| Paliperidone Palmitatebrand: Invega Sustenna | 42 | — |
| Alprazolam | 38 | 16 |
| Buspirone Hcl | 38 | 16 |
| Lamotrigine | 34 | 22 |
| Aripiprazole | 33 | 13 |
| Clonazepam | 30 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-20
- Last updated
- 2019-03-21
Frequently asked questions
- What is Mark Diercks's NPI number?
- Mark Diercks's National Provider Identifier (NPI) is 1134283567, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Diercks's specialty?
- Mark Diercks is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Diercks located?
- Mark Diercks's practice location on file with NPPES is 1111 North 13th Street, Omaha, NE 68102-4251.
- What is Mark Diercks's phone number?
- The practice phone number listed in the NPPES registry for Mark Diercks is (402) 348-1996.
- Does Mark Diercks accept Medicare?
- Mark Diercks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Diercks's NPI active?
- Yes — Mark Diercks's NPI (1134283567) is active in the NPPES registry as of the last update on 2019-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.