Nicholas Walker, M.D.
NPI 1437241221 · Interventional Cardiology Physician · Coralville, IA
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Walker, M.D. is a Interventional Cardiology Physician provider in Coralville, IA (NPI 1437241221).
Provider details
- NPI number
- 1437241221
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35043 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,381 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 538 | $97 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 130 | $7 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 126 | $11 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 101 | $63 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 94 | $131 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 499 | 164 |
| Atorvastatin Calcium | 360 | 110 |
| Lisinopril | 274 | 88 |
| Amlodipine Besylate | 260 | 92 |
| Losartan Potassium | 252 | 79 |
| Rosuvastatin Calcium | 239 | 74 |
| Isosorbide Mononitrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$100 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (4)
- 2450 Coral CtCoralville, IA 52241-2975Phone: (319) 645-3300Fax: (319) 645-3695
- 2000 S Main StFairfield, IA 52556-9572Phone: (877) 891-5350
- 500 E Market StIowa City, IA 52245-2633Phone: (319) 339-3551Fax: (319) 248-7945
- 200 Hawkins DrDepartment of Internal MedicineIowa City, IA 52242-1009Phone: (319) 339-3883Fax: (319) 339-3882
Registry dates
- Enumerated
- 2006-09-29
- Last updated
- 2025-08-21
- Certified
- 2025-08-21
Frequently asked questions
- What is Nicholas Walker's NPI number?
- Nicholas Walker's National Provider Identifier (NPI) is 1437241221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Walker's specialty?
- Nicholas Walker is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Walker located?
- Nicholas Walker's practice location on file with NPPES is 105 E 9th St, Coralville, IA 52241-2209.
- What is Nicholas Walker's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Walker is (319) 467-2000.
- Does Nicholas Walker accept Medicare?
- Nicholas Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Walker's NPI active?
- Yes — Nicholas Walker's NPI (1437241221) is active in the NPPES registry as of the last update on 2025-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.