Douglas Parker, MD
NPI 1134137045 · Emergency Medicine Physician · Billings, MT
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Parker, MD is a Emergency Medicine Physician provider in Billings, MT (NPI 1134137045).
Provider details
- NPI number
- 1134137045
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 7190 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
418 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 232 | $170 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 113 | $117 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 52 | $70 |
| Critical Care, First 30-74 Minutes99291 | 21 | $207 |
Typical Medicare-allowed amounts for these services range $70–$207 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 40 | 38 |
| Cephalexin | 24 | 24 |
| Cefuroxime Axetilbrand: Cefuroxime | 20 | 19 |
| Ondansetronbrand: Ondansetron Odt | 14 | 14 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 12 | 12 |
| Methylprednisolone | 12 | 11 |
| Prednisone |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Douglas Parker's NPI number?
- Douglas Parker's National Provider Identifier (NPI) is 1134137045, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Parker's specialty?
- Douglas Parker is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Parker located?
- Douglas Parker's practice location on file with NPPES is 1233 N 30th St, Billings, MT 59101-0127.
- What is Douglas Parker's phone number?
- The practice phone number listed in the NPPES registry for Douglas Parker is (406) 237-4116.
- Does Douglas Parker accept Medicare?
- Douglas Parker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Parker's NPI active?
- Yes — Douglas Parker's NPI (1134137045) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.