Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Joseph Olk, MD

Ophthalmology Physician in Saint Louis, MO · enumerated 2005.

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

National Provider Identifier

1265429245

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Joseph Olk

Credential MD

Sex Male

Practice address 11710 Old Ballas Rd, Suite 102, Saint Louis, MO, 63141

Phone (314) 569-2020

Fax (314) 569-1596

Enumeration date Oct 4, 2005

Last updated in NPPES Jan 24, 2024

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License R9531 (MO) Primary

207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License R9531 (MO) Secondary

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
180036813 CI6574	Other	IL	MEDICARE RAILROAD
2498755005	Other	MO	CIGNA
14566	Other	MO	ESSENCE
201519345	Medicaid	MO	-
101062	Other	MO	HEALTHLINK
106672	Other	MO	BLUE SHIELD
6739	Other	MO	HEALTHCARE USA
63192	Other	MO	GROUP HEALTH PLAN
A13535	Other	MO	MERCY HEALTH PLANS
008245	Other	MO	EXCLUSIVE
0882289	Other	MO	UNITED HEALTH CARE
180027468 CD5617	Other	MO	RAILROAD MEDICARE
IL4498001	Other	IL	IL MEDICARE

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.

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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 Robert Olk?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-24.