Elizabeth Obrien, M.D.
NPI 1881650570 · Internal Medicine Physician · Carlinville, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Obrien, M.D. is a Internal Medicine Physician provider in Carlinville, IL (NPI 1881650570).
Provider details
- NPI number
- 1881650570
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 41416-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
553 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) |
|---|---|---|
| Blood Test, Clotting Time85610 | 266 | $4 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 175 | $9 |
| Automated Urinalysis Test81003 | 72 | $2 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 29 | $50 |
| Detection Test By Nucleic Acid for Multiple Types Influenza Virus87502 | 11 | $90 |
Typical Medicare-allowed amounts for these services range $2–$90 (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 · 188 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 913 | 191 |
| Lisinopril | 774 | 176 |
| Omeprazole | 615 | 120 |
| Levothyroxine Sodium | 595 | 112 |
| Amlodipine Besylate | 529 | 121 |
| Losartan Potassium | 490 | 113 |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-22
- Last updated
- 2020-05-21
- Certified
- 2020-05-21
Frequently asked questions
- What is Elizabeth Obrien's NPI number?
- Elizabeth Obrien's National Provider Identifier (NPI) is 1881650570, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Obrien's specialty?
- Elizabeth Obrien is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Obrien located?
- Elizabeth Obrien's practice location on file with NPPES is 20613 N Broad St, Carlinville, IL 62626-3717.
- What is Elizabeth Obrien's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Obrien is (217) 854-5099.
- Does Elizabeth Obrien accept Medicare?
- Elizabeth Obrien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Obrien's NPI active?
- Yes — Elizabeth Obrien's NPI (1881650570) is active in the NPPES registry as of the last update on 2020-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.