Marshall Greiman, MD
NPI 1376657957 · Otolaryngology Physician · Clive, IA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall Greiman, MD is a Otolaryngology Physician provider in Clive, IA (NPI 1376657957).
Provider details
- NPI number
- 1376657957
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25508 (IA)
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
735 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 176 | $84 |
| Removal of Impacted Ear Wax69210 | 156 | $42 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 110 | $118 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 86 | $102 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 68 | $154 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 68 | 27 |
| Gabapentin | 61 | 15 |
| Pantoprazole Sodium | 51 | 20 |
| Ipratropium Bromide | 41 | 18 |
| Famotidine | 36 | 16 |
| Fluticasone Propionate | 34 | 12 |
| Montelukast Sodium | 32 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-19
- Last updated
- 2024-02-13
- Certified
- 2024-02-13
Frequently asked questions
- What is Marshall Greiman's NPI number?
- Marshall Greiman's National Provider Identifier (NPI) is 1376657957, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall Greiman's specialty?
- Marshall Greiman is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall Greiman located?
- Marshall Greiman's practice location on file with NPPES is 1601 Nw 114th St, Clive, IA 50325-7007.
- What is Marshall Greiman's phone number?
- The practice phone number listed in the NPPES registry for Marshall Greiman is (515) 222-7761.
- Does Marshall Greiman accept Medicare?
- Marshall Greiman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall Greiman's NPI active?
- Yes — Marshall Greiman's NPI (1376657957) is active in the NPPES registry as of the last update on 2024-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.