Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Monica Joan Trail, MD.

Dermatology Physician in Porter Ranch, CA · enumerated 2006 · practices at Wholerx Inc.

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

National Provider Identifier

1619058542

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Registry record

Entity type Individual (Type 1)

Name Monica Joan Trail

Credential MD.

Sex Female

Practice address 19950 Rinaldi St, Porter Ranch, CA, 91326

Phone (818) 403-2450

Fax (818) 363-9815

Enumeration date Oct 18, 2006

Last updated in NPPES Apr 3, 2014

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD.025872 (LA) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A111384 (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
1048208	Medicaid	LA	-
00A1113840	Medicaid	CA	-

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 specialty is Monica Trail?

Monica Trail is registered in NPPES with the primary taxonomy of Dermatology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Elise Kwon Endocrinology, Diabetes & Metabolism Physician · Porter Ranch, CA NPI 1265463731 Fredrick Russo Internal Medicine Physician · Porter Ranch, CA NPI 1457370074 Michael Nelson Internal Medicine Physician · Porter Ranch, CA NPI 1346254968 Richard Landers Internal Medicine Physician · Porter Ranch, CA NPI 1679689921 Loren Leshan Family Medicine Physician · Porter Ranch, CA NPI 1194832642 David Chien Pediatrics Physician · Porter Ranch, CA NPI 1346303674 Adam Dietz Orthopaedic Surgery Physician · Porter Ranch, CA NPI 1346384898 Wholerx Inc Community/Retail Pharmacy · Porter Ranch, CA NPI 1538350541

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-03.