Tiffany Karas, MD
NPI 1013993336 · Endocrinology, Diabetes & Metabolism Physician · Geneva, IL
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tiffany Karas, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Geneva, IL (NPI 1013993336).
Provider details
- NPI number
- 1013993336
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-109127 (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
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
1,574 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 486 | $135 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 384 | $17 |
| Hemoglobin A1c Level83036 | 329 | $10 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 219 | $36 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 71 | $96 |
| Injection of Drug Or Substance Under Skin Or Into Muscle |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 596 | 150 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 292 | 82 |
| Levothyroxine Sodiumbrand: Synthroid | 248 | 61 |
| Semaglutidebrand: Ozempic | 244 | 56 |
| Empagliflozinbrand: Jardiance | 199 | 49 |
| Metformin Hcl | 177 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-19
- Last updated
- 2013-04-09
Frequently asked questions
- What is Tiffany Karas's NPI number?
- Tiffany Karas's National Provider Identifier (NPI) is 1013993336, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tiffany Karas's specialty?
- Tiffany Karas is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Tiffany Karas located?
- Tiffany Karas's practice location on file with NPPES is 302 Randall Rd, Geneva, IL 60134-4209.
- What is Tiffany Karas's phone number?
- The practice phone number listed in the NPPES registry for Tiffany Karas is (630) 208-6775.
- Does Tiffany Karas accept Medicare?
- Tiffany Karas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tiffany Karas's NPI active?
- Yes — Tiffany Karas's NPI (1013993336) is active in the NPPES registry as of the last update on 2013-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.