Mark Chyna, M.D.
NPI 1740273507 · Internal Medicine Physician · Libertyville, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Chyna, M.D. is a Internal Medicine Physician provider in Libertyville, IL (NPI 1740273507).
Provider details
- NPI number
- 1740273507
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-092429 (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
322 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 | 80 | $132 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 77 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $94 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 63 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 20 | $185 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 127 | 37 |
| Levothyroxine Sodium | 126 | 31 |
| Rosuvastatin Calcium | 113 | 36 |
| Losartan Potassium | 68 | 19 |
| Metoprolol Succinate | 68 | 21 |
| Amlodipine Besylate | 62 | 16 |
| Pravastatin Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-26
- Last updated
- 2008-12-26
Frequently asked questions
- What is Mark Chyna's NPI number?
- Mark Chyna's National Provider Identifier (NPI) is 1740273507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Chyna's specialty?
- Mark Chyna is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Chyna located?
- Mark Chyna's practice location on file with NPPES is 890 Garfield Ave, Libertyville, IL 60048.
- What is Mark Chyna's phone number?
- The practice phone number listed in the NPPES registry for Mark Chyna is (847) 367-3843.
- Does Mark Chyna accept Medicare?
- Mark Chyna is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Chyna's NPI active?
- Yes — Mark Chyna's NPI (1740273507) is active in the NPPES registry as of the last update on 2008-12-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.