Mark James Lloyd London, M.D.
Surgery Physician · Chicago, IL
Mark James Lloyd London, M.D. is a surgery physician with a practice address in Chicago, Illinois, and NPI 1295032258, issued on Feb 26, 2011. Check the license (Illinois 036.126462, 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 Lloyd London
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 036.126462 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave, Chicago, IL 60637
- Phone
- (773) 702-1000
- Enumerated
- Feb 26, 2011
- Record last updated
- Feb 26, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170424001386); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 5841 S Maryland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sara Abdelaziz, MDEndocrinology, Diabetes & Metabolism Physician1598258089
- Noor Abdelrahman, PA-CPhysician Assistant1851012413
- Unknown Abdul Hanan, MDBlood Banking & Transfusion Medicine Physician1750022240
Verify Mark James Lloyd London 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 036.126462Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average surgery physician in 2024
398 Medicare Part D claims for 286 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 368 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen325 claims
- Oxycodone-Acetaminophen34 claims
- Naloxone Hcl21 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.
Industry payments in 2024: $84.08
5 payments; by number, the most common kind was food and beverage; the largest payer was W. L. Gore & Associates, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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 one group practice
- Musc Community PhysiciansOrangeburg, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Surgery Physician providers in Illinois
There are 1,520 surgery physician records in Illinois.
Other surgery physician records in Illinois
- Douglas Aach, MDShiloh, IL1508817040
- Andrew Abadier, DOChicago, IL1124657473
- Shabirhusain Abadin, M.D.Chicago, IL1467712596
- Iftikharul Abbasy, MDOak Brook, IL1104814755
- Mahmoud Abd-El-Hafez, MDSpringfield, IL1710516943
- Samir Abdo, M.D.Eldorado, IL1578612982
- Chandrakumaran Abivarma, M.D.Park Ridge, IL1467135137
- Gerard Abood, M.DMaywood, IL1629237227
- Mohammad Abou El-Ezz, MDChicago, IL1790536746
- Gifty Abraham, M.D.Maywood, IL1881039279
Common questions
What is Mark James Lloyd London, M.D.'s NPI number?
Mark James Lloyd London, M.D.'s National Provider Identifier (NPI) is 1295032258, issued on Feb 26, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark James Lloyd London, M.D. located?
The NPPES record lists a practice address at 5841 S Maryland Ave, Chicago, IL, 60637. Phone: (773) 702-1000. Providers update this record themselves, so call before visiting.
How can I verify Mark James Lloyd London, M.D.'s license?
NPPES lists Illinois license number 036.126462, 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 Lloyd London, M.D. prescribe under Medicare Part D?
In 2024, Mark James Lloyd London, M.D. had 398 Medicare Part D claims for 286 beneficiaries; the average among surgery physician prescribers was 147. 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.