Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alan Richard Mayfield, M.D.

Psychiatry Physician in San Diego, CA · enumerated 2006.

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

National Provider Identifier

1821151648

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Registry record

Entity type Individual (Type 1)

Name Dr. Alan Richard Mayfield

Credential M.D.

Sex Male

Practice address 34800 Bob Wilson Dr., Bldg 6, 3rd Floor, Mental Health, San Diego, CA, 92134

Phone (619) 532-5666

Fax (619) 532-5687

Enumeration date Dec 19, 2006

Last updated in NPPES Apr 6, 2026

Taxonomy & licenses

2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License A94205 (CA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A94205 (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

What is the NPI number for Alan Mayfield?

The National Provider Identifier (NPI) for Alan Mayfield is 1821151648, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alan Mayfield practice?

The practice location on file with NPPES is in San Diego, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-06.