Holly Loud, D.O
NPI 1831306612 · Emergency Medicine Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Loud, D.O is a Emergency Medicine Physician provider in Mchenry, IL (NPI 1831306612).
Provider details
- NPI number
- 1831306612
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O
- Sex
- Female
- Sole proprietor
- No
- License
- 036127057 (IL)
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
531 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 | 311 | $173 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 135 | $119 |
| Critical Care, First 30-74 Minutes99291 | 85 | $208 |
Typical Medicare-allowed amounts for these services range $119–$208 (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 | 45 | 45 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 22 | 20 |
| Amlodipine Besylate | 16 | — |
| Prednisone | 12 | 12 |
| Cephalexin | 12 | 12 |
| Methylprednisolone | 11 | 11 |
| Tramadol Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 801 S Milwaukee AveLibertyville, IL 60048-3204Phone: (414) 290-6720Fax: (414) 290-6755
Registry dates
- Enumerated
- 2007-05-17
- Last updated
- 2023-01-31
- Certified
- 2023-01-31
Frequently asked questions
- What is Holly Loud's NPI number?
- Holly Loud's National Provider Identifier (NPI) is 1831306612, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Loud's specialty?
- Holly Loud is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Holly Loud located?
- Holly Loud's practice location on file with NPPES is 4201 W Medical Center Dr, Mchenry, IL 60050-8409.
- What is Holly Loud's phone number?
- The practice phone number listed in the NPPES registry for Holly Loud is (815) 759-3100.
- Does Holly Loud accept Medicare?
- Holly Loud is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Loud's NPI active?
- Yes — Holly Loud's NPI (1831306612) is active in the NPPES registry as of the last update on 2023-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.