Mark James Chyna, M.D.
Internal Medicine Physician · Libertyville, IL
Mark James Chyna, M.D. is an internal medicine physician with a practice address in Libertyville, Illinois, and NPI 1740273507, issued on Aug 26, 2005. Check the license (Illinois 036-092429, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mark James Chyna
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-092429 IL
Self-reported in NPPES; status is on the state search - Practice location
- 890 Garfield Ave, Libertyville, IL 60048
- Phone
- (847) 367-3843
- Enumerated
- Aug 26, 2005
- Record last updated
- Dec 26, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (847) 367-3063
- Medicare enrollment
- Enrolled (PECOS I20070419000536); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 890 Garfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ruth McGaha, ACNPAcute Care Clinical Nurse Specialist1184924961
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Verify Mark James Chyna in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-092429Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,152 Medicare Part D claims for 138 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Atorvastatin Calcium127 claims
- Levothyroxine Sodium126 claims
- Rosuvastatin Calcium113 claims
- Losartan Potassium68 claims
- Metoprolol Succinate68 claims
- Amlodipine Besylate62 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Mark James Chyna among 7,238 internal medicine physician records in Illinois
Mark James Chyna, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1993 · median 2003 among the 3,580 with a school on file
- Record last updated2008 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 internal medicine physician records list a practice address in Libertyville
They are 27 of the 1,361 NPPES records with a practice address in Libertyville, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Libertyville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohina Gupta, MDLibertyville, IL 600481174578843
- Michael Hall, M.D.Libertyville, IL 600481528053972
- Syeda Iftikhar, M.D.Libertyville, IL 600481770599938
- Allison Klotzbuecher, D.O.Libertyville, IL 600481437170552
- Elliot Miller, MDLibertyville, IL 600481164441572
- Melissa Reeves, MDLibertyville, IL 600481942212311
- Mark Riederman, M.D.Libertyville, IL 600481699782151
- Robert Romanelli, M.D.Libertyville, IL 600481144208554
Common questions
What is Mark James Chyna, M.D.'s NPI number?
Mark James Chyna, M.D.'s National Provider Identifier (NPI) is 1740273507, issued on Aug 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark James Chyna, M.D. located?
The NPPES record lists a practice address at 890 Garfield Ave, Libertyville, IL, 60048. Phone: (847) 367-3843. Providers update this record themselves, so call before visiting.
How can I verify Mark James Chyna, M.D.'s license?
NPPES lists Illinois license number 036-092429, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark James Chyna, M.D. prescribe under Medicare Part D?
In 2024, Mark James Chyna, M.D. had 2,152 Medicare Part D claims for 138 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.