NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Erika Monique Simpson, M.D.

Obstetrics & Gynecology Physician in Oakland, CA · enumerated 2011.

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

National Provider Identifier

1558659847

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Erika Monique Simpson
Credential M.D.
Sex Female
Practice address 280 W Macarthur Blvd, Oakland, CA, 94611
Phone (510) 752-7772
Enumeration date Jul 20, 2011
Last updated in NPPES Feb 10, 2022

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License A117379 (CA) Primary
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 1558659847 active?
Yes, as of the latest NPPES snapshot, NPI 1558659847 is active (record last updated 2022-02-10).
How do I verify Erika Simpson's NPI record?
Cross-check NPI 1558659847 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 2022-02-10.