NPPES file of Aug 9, 2026

Mark S. Plessman, OTR/L

Occupational Therapist · Casper, WY

Mark S. Plessman, OTR/L is an occupational therapist with a practice address in Casper, Wyoming, and NPI 1326060658, issued on Jul 24, 2006. Check the license (Wyoming OTR-600, as entered in NPPES) with the Wyoming board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326060658
Name
Mark S. Plessman
Credential
OTR/L
Primary taxonomy
Occupational Therapist 225X00000X
License number
OTR-600 WY
Self-reported in NPPES; status is on the state search
Practice location
2665 E 2ND St, Casper, WY 82609
Phone
(307) 337-1740
Enumerated
Jul 24, 2006
Record last updated
Dec 13, 2022
Fax
(307) 337-1739
Medicaid ID
120069100 WY
Medicare enrollment
Enrolled (PECOS I20041012000524); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest occupational therapist records → All 315 in Wyoming → Look up another NPI →

Also registered at 2665 E 2ND St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Daniel ArnoldOrthopedic Physical Therapist1073375853
  2. Olivia Donald, OTRLOccupational Therapist1003029653
  3. Jennifer Mandros, DPTPhysical Therapist1821386046
  4. April SchreursPhysical Therapist1609276336

Verify Mark S. Plessman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Wyoming board licenses this profession
    Search for license OTR-600    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Wyoming license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. 307 Physical TherapyCasper, WY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mark S. Plessman among 315 occupational therapist records in Wyoming

Mark S. Plessman, OTR/L is one of 315 occupational therapist records with a practice address in Wyoming. 26% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 0% of them.

  • NPI issued2006 · 0% of these records are older, 91% newer
  • In a Medicare fileYes · 26% of these records are
  • In the CMS Doctors and Clinicians fileYes · 28% of these records are
  • Graduated1995 · median 2019 among the 87 with a school on file
  • Record last updated2022 · 66% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225X00000X and a Wyoming practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

68 occupational therapist records list a practice address in Casper

They are 68 of the 1,924 NPPES records with a practice address in Casper, and 315 occupational therapist records in Wyoming.

All 315 in Wyoming → Every provider in Casper → Occupational Therapist nationwide →

The 8 occupational therapist records with the nearest ZIP codes

  1. Catherine Bailey, OTR/LCasper, WY 826091790190007
  2. Amber Bath, OTCasper, WY 826091881980662
  3. Olivia Donald, OTRLCasper, WY 826091003029653
  4. Jean Ennis, OTRCasper, WY 826091841356284
  5. Heidi Gleason, OTR/LCasper, WY 826091114907151
  6. Heather Grigg, MOTR/LCasper, WY 826091841447232
  7. Sandra Hoppe, OTR/LCasper, WY 826091811149867
  8. Cheryl Keffeler, MOT, OTRLCasper, WY 826091649328873

Common questions

What is Mark S. Plessman, OTR/L's NPI number?

Mark S. Plessman, OTR/L's National Provider Identifier (NPI) is 1326060658, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark S. Plessman, OTR/L located?

The NPPES record lists a practice address at 2665 E 2ND St, Casper, WY, 82609. Phone: (307) 337-1740. Providers update this record themselves, so call before visiting.

How can I verify Mark S. Plessman, OTR/L's license?

NPPES lists Wyoming license number OTR-600, as entered by the provider. Search the Wyoming board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.