NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Lenox Heimer II, M.D.

Procedural Dermatology Physician in Encinitas, CA · enumerated 2006 · practices at Nayana Mohan Trivedi MD Inc.

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

National Provider Identifier

1225147481

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. William Lenox Heimer II
Credential M.D.
Sex Male
Practice address 320 Santa Fe Drive, Suite 310, Encinitas, CA, 92024
Phone (760) 944-7000
Fax (760) 944-1556
Enumeration date Aug 30, 2006
Last updated in NPPES Mar 19, 2014

Taxonomy & licenses

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License G85498 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00G854980 Other - BLUE CROSS/BLUE SHIELD
330900346 Other - TRICARE

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

Is NPI 1225147481 active?
Yes, as of the latest NPPES snapshot, NPI 1225147481 is active (record last updated 2014-03-19).
How do I verify William Heimer's NPI record?
Cross-check NPI 1225147481 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-19.