Mark Willcox, M.D.
NPI 1336395599 · Clinical Cardiac Electrophysiology Physician · Anchorage, AK
Enrolled with Medicare as Practitioner - Cardiac Electrophysiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Willcox, M.D. is a Clinical Cardiac Electrophysiology Physician provider in Anchorage, AK (NPI 1336395599).
Provider details
- NPI number
- 1336395599
- Entity type
- Individual
- Primary specialty
- Clinical Cardiac Electrophysiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 110882 (AK)
Specialties & taxonomies
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
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,222 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 608 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 175 | $160 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 144 | $209 |
| Destruction of Tissue of Upper Heart Chamber Through Tube to Treat Abnormal Heart Rhythm93657 | 96 | $367 |
| Programming of Heart Rhythm Stimulation After Drug Infusion93623 | 78 | $80 |
| Comprehensive Electrophysiologic Evaluation With Catheter Destruction of Abnormality Causing Atrial Fibrillation (uncoordinated Contraction of Upper Chambers of Heart) By Pulmonary Vein Isolation |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 227 | 70 |
| Metoprolol Succinate | 111 | 46 |
| Rivaroxabanbrand: Xarelto | 56 | 18 |
| Amiodarone Hcl | 45 | 16 |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) | 35 | 15 |
| Sacubitril/Valsartanbrand: Entresto | 32 | — |
| Carvedilol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$515 across 17 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
Registry dates
- Enumerated
- 2008-08-07
- Last updated
- 2026-01-14
- Certified
- 2026-01-14
Frequently asked questions
- What is Mark Willcox's NPI number?
- Mark Willcox's National Provider Identifier (NPI) is 1336395599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Willcox's specialty?
- Mark Willcox is listed in the NPPES registry with a primary specialty of Clinical Cardiac Electrophysiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Willcox located?
- Mark Willcox's practice location on file with NPPES is 3841 Piper St, Anchorage, AK 99508-4624.
- What is Mark Willcox's phone number?
- The practice phone number listed in the NPPES registry for Mark Willcox is (907) 561-3211.
- Does Mark Willcox accept Medicare?
- Mark Willcox is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Willcox's NPI active?
- Yes — Mark Willcox's NPI (1336395599) is active in the NPPES registry as of the last update on 2026-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.