Deanna Lassegard, M.D.
NPI 1639558653 · Emergency Medical Services (Emergency Medicine) Physician · Gillette, WY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Deanna Lassegard, M.D. is a Emergency Medical Services (Emergency Medicine) Physician provider in Gillette, WY (NPI 1639558653).
Provider details
- NPI number
- 1639558653
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 2017-01326 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
357 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 97 | $8 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 90 | $64 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 79 | $110 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 73 | $161 |
| Emergency Department Visit With Straightforward Medical Decision Making99282 | 18 | $38 |
Typical Medicare-allowed amounts for these services range $8–$161 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 20 | 20 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 15 | 15 |
| Hydrochlorothiazide | 14 | — |
| Apixabanbrand: Eliquis | 13 | — |
| Ondansetronbrand: Ondansetron Odt | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 353 Fairmont BlvdRapid City, SD 57701-7375Phone: (866) 765-0909Fax: (855) 856-8520
Registry dates
- Enumerated
- 2015-05-22
- Last updated
- 2019-11-21
Frequently asked questions
- What is Deanna Lassegard's NPI number?
- Deanna Lassegard's National Provider Identifier (NPI) is 1639558653, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Deanna Lassegard's specialty?
- Deanna Lassegard is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Deanna Lassegard located?
- Deanna Lassegard's practice location on file with NPPES is 501 S Burma Ave, Gillette, WY 82716-3426.
- What is Deanna Lassegard's phone number?
- The practice phone number listed in the NPPES registry for Deanna Lassegard is (307) 688-1000.
- Does Deanna Lassegard accept Medicare?
- Deanna Lassegard is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Deanna Lassegard's NPI active?
- Yes — Deanna Lassegard's NPI (1639558653) is active in the NPPES registry as of the last update on 2019-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.