John Macarthur, M.D.
NPI 1891957106 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Macarthur, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Palo Alto, CA (NPI 1891957106).
Provider details
- NPI number
- 1891957106
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MT193411 (PA)
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
18 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
228 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) |
|---|---|---|
| Replacement of Aortic Valve Through the Skin and Femoral Artery33361 | 57 | $777 |
| Replacement of Mitral Valve on Heart-Lung Machine33430 | 21 | $2,837 |
| Harvest of Vein Using an Endoscope33508 | 20 | $16 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 20 | $1,577 |
| Replacement of Aortic Valve on Heart-Lung Machine33405 | 18 | $1,571 |
| Implantation of Artificial Valve Between Right Upper and Lower Chambers of Heart Through Catheter0646T | 16 | $870 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,314 across 44 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
- 2008-06-27
- Last updated
- 2024-04-27
- Certified
- 2024-04-27
Frequently asked questions
- What is John Macarthur's NPI number?
- John Macarthur's National Provider Identifier (NPI) is 1891957106, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Macarthur's specialty?
- John Macarthur is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is John Macarthur located?
- John Macarthur's practice location on file with NPPES is 300 Pasteur Dr, Palo Alto, CA 94304-2203.
- What is John Macarthur's phone number?
- The practice phone number listed in the NPPES registry for John Macarthur is (650) 723-4000.
- Does John Macarthur accept Medicare?
- John Macarthur is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Macarthur's NPI active?
- Yes — John Macarthur's NPI (1891957106) is active in the NPPES registry as of the last update on 2024-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.