NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick Michael Mullin, MD

Maternal & Fetal Medicine Physician in Pasadena, CA · enumerated 2006 · practices at Aaron J Epstein MD Inc.

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

National Provider Identifier

1255345203

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Patrick Michael Mullin
Credential MD
Sex Male
Practice address 50 Alessandro Pl Ste 210, Pasadena, CA, 91105
Phone (626) 514-0060
Fax (626) 514-0062
Enumeration date Jul 27, 2006
Last updated in NPPES Nov 29, 2022

Taxonomy & licenses

207VX0000X Obstetrics Physician Allopathic & Osteopathic Physicians · License A62503 (CA) Secondary
207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License A62503 (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
A62503 Other CA PHYSICIAN AND SURGEON LICENSE

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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Patrick Mullin?
Patrick Mullin is registered in NPPES with the primary taxonomy of Maternal & Fetal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-29.