Elizabeth Mcmasters, MD
NPI 1427067180 · Psychiatry Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Mcmasters, MD is a Psychiatry Physician provider in Mchenry, IL (NPI 1427067180).
Provider details
- NPI number
- 1427067180
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-087029 (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
5 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
200 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 117 | $118 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 31 | $113 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 27 | $173 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $126 |
Typical Medicare-allowed amounts for these services range $113–$173 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 78 | 16 |
| Lamotrigine | 55 | 14 |
| Gabapentin | 32 | 13 |
| Sertraline Hcl | 31 | — |
| Alprazolam | 28 | — |
| Divalproex Sodium | 27 | — |
| Fluoxetine Hcl | 23 | — |
Practice location
Mailing address
Additional practice locations (4)
- 370 Summit StElgin, IL 60120-3843Phone: (847) 608-1344Fax: (815) 363-5707
- 10350 Haligus Rd Ste 200Huntley, IL 60142-9545Phone: (815) 338-6600Fax: (847) 802-7265
- 10400 Haligus RdHuntley, IL 60142-9553Phone: (815) 338-6600
- 3701 Doty RdWoodstock, IL 60098-7509Phone: (815) 338-6600
Registry dates
- Enumerated
- 2006-08-05
- Last updated
- 2019-01-28
Frequently asked questions
- What is Elizabeth Mcmasters's NPI number?
- Elizabeth Mcmasters's National Provider Identifier (NPI) is 1427067180, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Mcmasters's specialty?
- Elizabeth Mcmasters is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Mcmasters located?
- Elizabeth Mcmasters's practice location on file with NPPES is 4201 W Medical Center Dr, Mchenry, IL 60050.
- What is Elizabeth Mcmasters's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Mcmasters is (815) 338-6600.
- Does Elizabeth Mcmasters accept Medicare?
- Elizabeth Mcmasters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Mcmasters's NPI active?
- Yes — Elizabeth Mcmasters's NPI (1427067180) is active in the NPPES registry as of the last update on 2019-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.