Feliks Mavashev, MD
NPI 1215946603 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Feliks Mavashev, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1215946603).
Provider details
- NPI number
- 1215946603
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036101294 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,044 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,308 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 613 | $94 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 508 | $15 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 462 | $122 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 448 | $3 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 208 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 819 | 115 |
| Rosuvastatin Calcium | 750 | 121 |
| Metoprolol Succinate | 727 | 107 |
| Pantoprazole Sodium | 723 | 113 |
| Atorvastatin Calcium | 680 | 110 |
| Levothyroxine Sodium | 655 | 82 |
| Famotidine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-05
- Last updated
- 2020-10-13
- Certified
- 2020-10-13
Frequently asked questions
- What is Feliks Mavashev's NPI number?
- Feliks Mavashev's National Provider Identifier (NPI) is 1215946603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Feliks Mavashev's specialty?
- Feliks Mavashev is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Feliks Mavashev located?
- Feliks Mavashev's practice location on file with NPPES is 1007 W Lawrence Ave, Chicago, IL 60640-5017.
- What is Feliks Mavashev's phone number?
- The practice phone number listed in the NPPES registry for Feliks Mavashev is (773) 271-1500.
- Does Feliks Mavashev accept Medicare?
- Feliks Mavashev is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Feliks Mavashev's NPI active?
- Yes — Feliks Mavashev's NPI (1215946603) is active in the NPPES registry as of the last update on 2020-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.