Zan Siddiqi, MD
Internal Medicine Physician · Lansing, MI
Zan Siddiqi, MD is an internal medicine physician with a practice address in Lansing, Michigan, and NPI 1841980513, issued on May 8, 2023. Check the license (Michigan 4351051859, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Zan Siddiqi
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4351051859 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1215 E Michigan Ave, Lansing, MI 48912
- Phone
- (517) 364-1000
- Enumerated
- May 8, 2023
- Record last updated
- Feb 20, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1215 E Michigan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Zan Siddiqi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4351051859Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
329 Medicare Part D claims for 68 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium24 claims
- Amlodipine Besylate19 claims
- Gabapentin16 claims
- Carvedilol12 claims
- Lisinopril12 claims
- Losartan Potassium11 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: $102.33
4 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Zan Siddiqi among 5,735 internal medicine physician records in Michigan
Zan Siddiqi, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 90% of them.
- NPI issued2023 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2024 · 54% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
135 internal medicine physician records list a practice address in Lansing
They are 135 of the 5,276 NPPES records with a practice address in Lansing, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Lansing → Internal Medicine Physician nationwide →
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- Habtamu Handro, M.D.Lansing, MI 489121558316000
- Fred Isaacs, M.D.Lansing, MI 489121487609665
- Carol Lyon, M.D.Lansing, MI 489121982659090
- Harry McCoy, M.D.Lansing, MI 489121003850702
Common questions
What is Zan Siddiqi, MD's NPI number?
Zan Siddiqi, MD's National Provider Identifier (NPI) is 1841980513, issued on May 8, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Zan Siddiqi, MD located?
The NPPES record lists a practice address at 1215 E Michigan Ave, Lansing, MI, 48912. Phone: (517) 364-1000. Providers update this record themselves, so call before visiting.
How can I verify Zan Siddiqi, MD's license?
NPPES lists Michigan license number 4351051859, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zan Siddiqi, MD prescribe under Medicare Part D?
In 2024, Zan Siddiqi, MD had 329 Medicare Part D claims for 68 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.