Spencer Mossack, MD
Urology Physician · Libertyville, IL
Spencer Mossack, MD is a urology physician with a practice address in Libertyville, Illinois, and NPI 1265061980, issued on Apr 4, 2020. Check the license (Illinois 1265061980, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Spencer Mossack
- Credential
- MD
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 1265061980 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Hollister Dr Ste 107, Libertyville, IL 60048
- Phone
- (847) 295-0010
- Enumerated
- Apr 4, 2020
- Record last updated
- Jun 30, 2026
- Entity
- Type 1 · individual
8 nearest urology physician records → All 629 in Illinois → Look up another NPI →
Also registered at 1800 Hollister Dr Ste 107
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Akua Akuffo, DNP-FNP-CNurse Practitioner1386124618
- Kristopher Atzeff, M.D.Urology Physician1073577045
- Justin Cohen, MDUrology Physician1700060704
- Mary HoganFamily Nurse Practitioner1629631478
- Ronald Kim, M.DUrology Physician1447451554
- Eric Kirshenbaum, M.D.Urology Physician1467794248
Verify Spencer Mossack 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 1265061980Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average urology physician in 2024
50 Medicare Part D claims for 31 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 18 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen17 claims
- Sulfamethoxazole-Trimethoprim12 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: $1,007.31
20 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 9,340 providers of this specialty with any payment received $3,800.04 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.
Spencer Mossack among 629 urology physician records in Illinois
Spencer Mossack, MD is one of 629 urology physician records with a practice address in Illinois. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 83% of them.
- NPI issued2020 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 54% of these records are
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Illinois
There are 629 urology physician records in Illinois.
All 629 in Illinois → Every provider in Libertyville → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Kristopher Atzeff, M.D.Libertyville, IL 600481073577045
- Justin Cohen, MDLibertyville, IL 600481700060704
- Ronald Kim, M.DLibertyville, IL 600481447451554
- Eric Kirshenbaum, M.D.Libertyville, IL 600481467794248
- Marc NelsonLibertyville, IL 600481043637325
- Avtar Dhindsa, MDMcHenry, IL 600501790844181
- Ricardo Nabong, M.D.McHenry, IL 600501578596193
- Elizabeth Schlessinger, MDMcHenry, IL 600501669935219
Common questions
What is Spencer Mossack, MD's NPI number?
Spencer Mossack, MD's National Provider Identifier (NPI) is 1265061980, issued on Apr 4, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Mossack, MD located?
The NPPES record lists a practice address at 1800 Hollister Dr Ste 107, Libertyville, IL, 60048. Phone: (847) 295-0010. Providers update this record themselves, so call before visiting.
How can I verify Spencer Mossack, MD's license?
NPPES lists Illinois license number 1265061980, 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 Spencer Mossack, MD prescribe under Medicare Part D?
In 2024, Spencer Mossack, MD had 50 Medicare Part D claims for 31 beneficiaries; the average among urology physician prescribers was 1,340. 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.