NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Delfin Santos, M.D.

Rheumatology Physician in Rochester, MI · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1063420628

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Delfin Santos
Credential M.D.
Sex Male
Practice address Rochester, MI, 48307
Phone (248) 852-2277
Fax (248) 852-2552
Enumeration date Aug 3, 2006
Last updated in NPPES Nov 30, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 4301059096 (MI) Primary
174400000X Specialist Other Service Providers · License 4301059096 (MI) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 → Validate an NPI →

Frequently asked questions

How do I verify Delfin Santos's NPI record?
Cross-check NPI 1063420628 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1063420628 active?
Yes, as of the latest NPPES snapshot, NPI 1063420628 is active (record last updated 2018-11-30).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-30.