1. Home
  2. Directory
  3. Minnesota
  4. Duluth
  5. Speech Language Pathologist
  6. NPI Profile

MR. HARRISON ROBERT OLK M.A., CCC-SLP
NPI 1265817654
Speech-Language Pathologist in Duluth, MN

Active since July 27, 2015
1600 MILLER TRUNK HWY, DULUTH, MN 55811(218) 786-5360(218) 786-5435 Get Directions Write a Review

NPPES record last updated: December 29, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 29, 2020, May 17, 2020 (2 updates tracked since 2020).

About Mr. Harrison Robert Olk M.a., Ccc-slp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. HARRISON ROBERT OLK M.A., CCC-SLP (NPI 1265817654) is an individual speech-language pathologist provider in Duluth, Minnesota, licensed in Oregon (15540) and active in the NPI registry since July 2015. He maintains a secondary practice location in Duluth.

NPPES Registry Identity

NPI1265817654
Entity TypeIndividualMale
Primary Taxonomy235Z00000X
Provider Legal NameMR. HARRISON ROBERT OLKCredential: M.A., CCC-SLP
Location Address1600 MILLER TRUNK HWYDuluth, MN 55811-5640
Mailing AddressSsb-5, 400 East Third StreetDuluth, MN 55805-1951 · (218) 786-8364
Phone(218) 786-5360
Fax(218) 786-5435
Sole ProprietorNo
Enumeration DateJuly 27, 2015
Last NPPES UpdateDecember 29, 20202 updates tracked since enumeration
NPPES CertifiedDecember 21, 2020
✔ NPI 1265817654 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
License✔ Licensed in OR · 15540
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
1600 MILLER TRUNK HWY, Duluth, MN 55811
Open in Google Maps ↗

Secondary Practice Location 1

Location 12501 Rice Lake RdDuluth, MN 55811-4819 · Phone (218) 625-6400

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Harrison Robert Olk M.a., Ccc-slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

Medicare enrollment records show Harrison Olk reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Duluth Clinic Ltd
Same address
Multi-Specialty
1600 MILLER TRUNK HWY STE 1300
Duluth, MN 55811
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,460 clinicians in this Medicare group
NPI 1245855162 (218) 786-3392

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 15

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FRANK C. MUNNS O.D. L.T.D.
Optometrist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 725-0204
ERIN CHRISTINE PANGERL OD
Optometrist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 727-2340
DR. FRANK CLARK MUNNS O.D.
Optometrist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 725-0204
ERIN KAY PETERSEN O.D.
Optometrist
1600 MILLER TRUNK HWY, SUITE 429
DULUTH, MN 55811
St. Louis County (218) 727-5457
MR. DAVID ALLEN BOHIL CCC/SLP
Speech-Language Pathologist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 786-8364
VISIONWORKS, INC.
Eyewear Supplier
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 727-6838
YINGXIN XU OD
Optometrist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 727-6838
MR. LOGAN MICHAEL VIEGUT PT
Physical Therapist
1600 MILLER TRUNK HWY
DULUTH, MN 55811
St. Louis County (218) 786-5360

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Harrison Olk's NPI number?

The NPI number for Harrison Olk is 1265817654. It was assigned to this individual provider in the NPPES registry on July 27, 2015.

Where is Harrison Olk located?

Harrison Olk practices at 1600 Miller Trunk Hwy, Duluth, MN 55811. The listed phone number is (218) 786-5360.

What is Harrison Olk's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Is Harrison Olk enrolled in Medicare?

Yes. Harrison Olk is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Harrison Olk's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harrison Olk reassigns Medicare benefits to The Duluth Clinic Ltd (Duluth, MN). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Harrison Olk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Harrison Olk was last updated on December 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.