Martin Carpenter, MD
NPI 1558359174 · Psychiatry Physician · Cedar Rapids, IA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Carpenter, MD is a Psychiatry Physician provider in Cedar Rapids, IA (NPI 1558359174).
Provider details
- NPI number
- 1558359174
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35422 (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
20 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
521 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 | 340 | $73 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 127 | $160 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 54 | $105 |
Typical Medicare-allowed amounts for these services range $73–$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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Escitalopram Oxalate | 24 | 16 |
| Bupropion Hclbrand: Bupropion Xl | 21 | — |
| Trazodone Hcl | 21 | 18 |
| Olanzapine | 17 | 11 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 14 | 11 |
| Lithium Carbonatebrand: Lithium Carbonate Er | 14 | — |
| Donepezil Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-07
- Last updated
- 2021-08-20
- Certified
- 2021-08-20
Frequently asked questions
- What is Martin Carpenter's NPI number?
- Martin Carpenter's National Provider Identifier (NPI) is 1558359174, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Carpenter's specialty?
- Martin Carpenter is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Carpenter located?
- Martin Carpenter's practice location on file with NPPES is Mercy Medical Center, Cedar Rapids, IA 52403.
- What is Martin Carpenter's phone number?
- The practice phone number listed in the NPPES registry for Martin Carpenter is (319) 369-4777.
- Does Martin Carpenter accept Medicare?
- Martin Carpenter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Carpenter's NPI active?
- Yes — Martin Carpenter's NPI (1558359174) is active in the NPPES registry as of the last update on 2021-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.