Carl R. Lang, M.D.
Internal Medicine Physician · Buffalo Grove, IL
Carl R. Lang, M.D. is an internal medicine physician with a practice address in Buffalo Grove, Illinois, and NPI 1730167339, issued on Jan 4, 2006. Check the license (Illinois 036062494, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Carl R. Lang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036062494 IL
Self-reported in NPPES; status is on the state search - Practice location
- 600 W Lake Cook RD, Buffalo Grove, IL 60089
- Phone
- (847) 632-1880
- Enumerated
- Jan 4, 2006
- Record last updated
- May 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (847) 520-6095
- Medicaid ID
- 036062494 IL
- Medicare enrollment
- Enrolled (PECOS I20071109000593); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 600 W Lake Cook RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kristin Bean, PA-CPhysician Assistant1386099091
- David Charman, M.D.Internal Medicine Physician1346228954
- Mark Charman, M.D.Internal Medicine Physician1033197637
- Neha Dalal, PAMedical Physician Assistant1982641718
- Papa Delacruz, M.D.Obstetrics & Gynecology Physician1497727200
- Michael Eisenberg, M.D.Obstetrics & Gynecology Physician1982677340
Verify Carl R. Lang 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 036062494Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average internal medicine physician in 2024
6,091 Medicare Part D claims for 304 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. 222 claims were for opioids.
Most prescribed
- Atorvastatin Calcium258 claims
- Levothyroxine Sodium238 claims
- Rosuvastatin Calcium166 claims
- Alprazolam135 claims
- Amlodipine Besylate132 claims
- Hydrocodone-Acetaminophen128 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.
The MIPS final score for 2023 (Medicare payment program): 89.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,607.70
75 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Abcm Healthcare Services PLLCDeerfield, IL
- Endeavor Health Medical GroupEvanston, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carl R. Lang among 7,238 internal medicine physician records in Illinois
Carl R. Lang, 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1980 · median 2003 among the 3,580 with a school on file
- Record last updated2021 · 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).
24 internal medicine physician records list a practice address in Buffalo Grove
They are 24 of the 868 NPPES records with a practice address in Buffalo Grove, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Buffalo Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Charman, M.D.Buffalo Grove, IL 600891346228954
- Mark Charman, M.D.Buffalo Grove, IL 600891033197637
- Stuart Ferber, M.D.Buffalo Grove, IL 600891952389413
- Irina Goldvekht, D.O.Buffalo Grove, IL 600891154309755
- Thomas Heggen, MDBuffalo Grove, IL 600891710974860
- Gabriel Kibrit, MDBuffalo Grove, IL 600891477531937
- Wendi Marcus, M.D.Buffalo Grove, IL 600891548249113
- Jules Marks, D.O.Buffalo Grove, IL 600891346228814
Common questions
What is Carl R. Lang, M.D.'s NPI number?
Carl R. Lang, M.D.'s National Provider Identifier (NPI) is 1730167339, issued on Jan 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carl R. Lang, M.D. located?
The NPPES record lists a practice address at 600 W Lake Cook RD, Buffalo Grove, IL, 60089. Phone: (847) 632-1880. Providers update this record themselves, so call before visiting.
How can I verify Carl R. Lang, M.D.'s license?
NPPES lists Illinois license number 036062494, 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 Carl R. Lang, M.D. prescribe under Medicare Part D?
In 2024, Carl R. Lang, M.D. had 6,091 Medicare Part D claims for 304 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Carl R. Lang, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.