John Lazar, M.D
John Lazar, M.D is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Washington, DC, registered under NPI 1578756722. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 110 IRVING ST NW RM G-253, Washington, DC 20010. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| MD452597 | PA | Thoracic Surgery (Cardiothoracic Vascular… primary |
| MD452597 | PA | Vascular Surgery Physician |
| MD452597 | PA | Hospice and Palliative Medicine (Surgery)… |
This provider holds licence MD452597 issued in PA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Thoracic Surgery
- PAC ID
- 4789827148
- Enrollment ID
- I20230906002822
Medicare enrolment is recorded as approved under the provider type Practitioner - Thoracic Surgery. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Thoracic Surgery (Cardiothoracic Vascular Surgery) covers
A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty. NUCC Health Care Provider Taxonomy, code 208G00000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 208G00000X | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician | MD452597 | PA | primary |
| 2086S0129X | Vascular Surgery Physician Vascular Surgery | MD452597 | PA | |
| 2086H0002X | Hospice and Palliative Medicine (Surgery) Physician Hospice and Palliative Medicine | MD452597 | PA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1578756722 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 21, 2007 |
| Last updated | Sep 7, 2018 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D |
| Practice address |
110 IRVING ST NW RM G-253 Washington, DC 20010 (202) 877-8115 Fax (202) 877-3699 |
| Other identifiers |
102947966
· Medicaid (PA) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 5 | 7 | 8 | 7 | 5 | 6 | 7 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 5 | 8 | 5 | 5 | 3 | 7 | 4 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.