Mark Walter
Sheridan, WY
- UEI
- N8XLS74K67V3
- CAGE
- 6EZ61
- Primary NAICS
- 621112 Offices of Physicians, Mental Health Specialists
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Sole Proprietorship
- NAICS codes registered in SAM.gov
- SAM.gov registration date
- Physical address
- 515 Park View Blvd, Sheridan, WY 82801, USA
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| SME services for k. Krause ISO hearing | Drug Enforcement Administration | $20,850 | |
| Offices of physicians, mental health specialists | Drug Enforcement Administration | $1,500 | |
| Title: SME DR. Walter for ISO proceedings k.krause case requestor: paul m larson POP dates: 11/15/2024 to 11/30/2025 | Drug Enforcement Administration | $6,730 | |
| Support- professional: expert witness | Drug Enforcement Administration | $14,950 | |
| Support- professional: expert witness | Drug Enforcement Administration | $15,000 |
About Mark Walter
Mark Walter, a sole proprietorship based in Sheridan, Wyoming, provides forensic pharmacy expert witness and medical record analysis services to the Drug Enforcement Administration as a prime contractor under full-and-open competition, with no set-asides. Walter specializes in prescription drug monitoring program (PDMP) data review, medical record examination, and expert testimony in support of DEA investigations and prosecutions of drug trafficking cases, delivering work at hourly rates between $350 and $500 per hour.
All 24 awards in the source record are prime contracts awarded by the DEA's Rocky Mountain Division and related offices, with a single outlier award from the US Attorney's Offices. The DEA relationship is concentrated — 23 of 24 awards, $280 thousand combined potential value — and reflects a consistent pattern of small purchase orders spanning from November 2021 through January 2026. Recent representative work includes a $35 thousand expert witness and medical record review engagement awarded February 2024 for the DEA's Office of Diversion (MK-21-0053 / HCN3R), a $15 thousand subject matter expert services contract awarded January 2026 for an ISO hearing related to the K. Krause case (running through January 2027), and a $12.5 thousand firm fixed-price order awarded May 2025 for prescription drug monitoring and patient file analysis. Most awards are structured as labor-hour purchase orders with estimated hour ranges (5 to 26 hours per engagement) and ceilings between $2.5 thousand and $35 thousand.
Activity has declined from 5 awards in 2022 to 1 award each in 2025 and 2026, though the source reflects only recent contracting history. Of the $280 thousand combined potential value, $229 thousand (82%) has been obligated across awards. One award carrying $15 thousand in potential value reaches ultimate completion inside the next twenty-four months, representing the recompete exposure in that window. Walter operates exclusively as a prime and carries no subcontractor role. The vendor's federal footprint is narrow — a single-agency, single-service relationship centered on forensic pharmacy expertise for drug enforcement prosecutions — with no parent vehicles, IDIQs, or multi-agency presence.
Quick answers
What is Mark Walter's UEI?
Mark Walter's Unique Entity ID (UEI) in SAM.gov is N8XLS74K67V3.
What is Mark Walter's CAGE code?
Mark Walter's CAGE code is 6EZ61.
What is Mark Walter's primary NAICS code?
Mark Walter's primary NAICS code is 621112 (Offices of Physicians, Mental Health Specialists).
Where is Mark Walter located?
Mark Walter's physical address in SAM.gov is 515 Park View Blvd, Sheridan, WY 82801, USA.
Is Mark Walter registered in SAM.gov?
Yes. Mark Walter's SAM.gov registration is active through February 28, 2027.
What is Mark Walter's most recent federal award?
Mark Walter's most recent federal contract award is SME services for k. Krause ISO hearing (15DDHQ26P00000200), from Drug Enforcement Administration, on January 26, 2026.
On GovTribe
See Mark Walter's full federal record
- Federal contract awards
- Funding analysis by agency, NAICS and set-aside
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