Cook & Siu PC
Cook & Siu PC is a healthcare organization registered as Internal Medicine Physician in Waldorf, MD, holding Type 2 (organization) NPI 1780852129 since 2008. The authorized official on file is Richard Cook, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1780852129 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Cook & Siu PC |
| Other name | <Unavail> |
| Practice address | 3450 OLD WASHINGTON RD STE 103, Waldorf, MD, 20602 |
| Phone | 3014724290 |
| Fax | 2406073609 |
| Enumeration date | 2008-02-20 |
| Last updated in NPPES | 2024-07-13 |
Authorized official
| Name | Richard Cook |
|---|---|
| Title | Owner |
| Phone | 3014729240 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | D0063483 | MD |
Copy-ready billing details
Provider: Cook & Siu PC NPI: 1780852129 Taxonomy: 207R00000X (Internal Medicine Physician) Address: 3450 OLD WASHINGTON RD STE 103, Waldorf, MD, 20602
Verify this record
Cross-check NPI 1780852129 against the authoritative CMS record: view Cook & Siu PC on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
Who is the authorized official for Cook & Siu PC?
What is the NPI number for Cook & Siu PC?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-07-13.