Maria Theodorou, M.D.
NPI 1427390244 · Hospitalist Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Theodorou, M.D. is a Hospitalist Physician provider in Chicago, IL (NPI 1427390244).
Provider details
- NPI number
- 1427390244
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036139541 (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
13 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
115 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 35 Minutes99232 | 61 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 41 | $124 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 13 | $121 |
Typical Medicare-allowed amounts for these services range $84–$124 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Hydromorphone Hcl | 38 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 25 |
| Atorvastatin Calcium | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 |
| Naloxone Hcl | 12 |
| Lorazepam | 11 |
| Fentanyl | 11 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-19
- Last updated
- 2017-05-15
Frequently asked questions
- What is Maria Theodorou's NPI number?
- Maria Theodorou's National Provider Identifier (NPI) is 1427390244, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Theodorou's specialty?
- Maria Theodorou is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Theodorou located?
- Maria Theodorou's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611-2908.
- What is Maria Theodorou's phone number?
- The practice phone number listed in the NPPES registry for Maria Theodorou is (312) 926-0627.
- Does Maria Theodorou accept Medicare?
- Maria Theodorou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Theodorou's NPI active?
- Yes — Maria Theodorou's NPI (1427390244) is active in the NPPES registry as of the last update on 2017-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.