NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Ann Nau Johnson, MD

Dermatology Physician in El Dorado Hills, CA · enumerated 2010 · practices at Dignity Health Medical Foundation.

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

National Provider Identifier

1508177163

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mary Ann Nau Johnson
Credential MD
Sex Female
Practice address 1264 Hawks Flight Ct, Suite 100, El Dorado Hills, CA, 95762
Phone (916) 939-8400
Fax (916) 933-5013
Enumeration date Jun 29, 2010
Last updated in NPPES Jul 14, 2015

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A113258 (CA) Primary
207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License A113258 (CA) 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

Is NPI 1508177163 active?
Yes, as of the latest NPPES snapshot, NPI 1508177163 is active (record last updated 2015-07-14).
How do I verify Mary Ann Johnson's NPI record?
Cross-check NPI 1508177163 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 2015-07-14.