Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Sarah Jean Diekman

Occupational Medicine Physician in Oakland, MD · enumerated 2013.

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

National Provider Identifier

1427497908

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Registry record

Entity type Individual (Type 1)

Name Dr. Sarah Jean Diekman

Sex Female

Practice address 5000 Thayer Ctr Ste C, Oakland, MD, 21550

Phone (833) 768-7633

Fax (949) 437-2692

Enumeration date Jun 18, 2013

Last updated in NPPES Aug 1, 2022

Taxonomy & licenses

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians · License D0093111 (MD) Primary

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 Sarah Diekman?

Sarah Diekman is registered in NPPES with the primary taxonomy of Occupational Medicine 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-01.