Vassilis Jerry Siomos, M.D.
Urology Physician · Kalispell, MT
Vassilis Jerry Siomos, M.D. is a urology physician with a practice address in Kalispell, Montana, and NPI 1598907149, issued on Mar 28, 2009. Check the license (Montana 41781, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Vassilis Jerry Siomos
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 41781 MT
Self-reported in NPPES; status is on the state search - Practice location
- 350 Heritage Way Ste 2300, Kalispell, MT 59901
- Phone
- (406) 752-8456
- Enumerated
- Mar 28, 2009
- Record last updated
- Nov 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20150914001570); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest urology physician records → All 53 in Montana → Look up another NPI →
Also registered at 350 Heritage Way Ste 2300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Andenoro, MDUrology Physician1518058551
- Gabriella Harman, PA-CPhysician Assistant1497675797
- Rhonda Johnson, P.A.Physician Assistant1578705059
- Sarah Latcham, NPAcute Care Nurse Practitioner1831016989
- Sarabeth Martin, M.D.Urology Physician1336466861
- Julie Shields, NPAdult Health Nurse Practitioner1639735616
Verify Vassilis Jerry Siomos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 41781Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average urology physician in 2024
840 Medicare Part D claims for 211 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 54 claims were for opioids.
Most prescribed
- Tamsulosin Hcl118 claims
- Silodosin116 claims
- Finasteride81 claims
- Cephalexin64 claims
- Oxybutynin Chloride44 claims
- Nitrofurantoin Mono-Macro43 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: $185.04
2 payments; by number, the most common kind was education; the largest payer was Astellas Pharma US Inc. 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.
Bills Medicare through one group practice
- Kalispell Regional Medical Center IncWhitefish, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vassilis Jerry Siomos among 53 urology physician records in Montana
Vassilis Jerry Siomos, M.D. is one of 53 urology physician records with a practice address in Montana. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 57% of them.
- NPI issued2009 · 57% of these records are older, 32% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2009 · median 2009 among the 37 with a school on file
- Record last updated2023 · 45% 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 Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Montana
There are 53 urology physician records in Montana.
All 53 in Montana → Every provider in Kalispell → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Gregory Adams, M.D.Kalispell, MT 599011366659476
- John Andenoro, MDKalispell, MT 599011518058551
- Michael Berson, MDKalispell, MT 599011588955256
- Craig Hinman, M.D.Kalispell, MT 599011598867061
- Robert Kirk, MDKalispell, MT 599011922045012
- Sarabeth Martin, M.D.Kalispell, MT 599011336466861
- Amy McKerrow, MDKalispell, MT 599011376598433
- Jonathan Mercer, MDKalispell, MT 599011992746192
Common questions
What is Vassilis Jerry Siomos, M.D.'s NPI number?
Vassilis Jerry Siomos, M.D.'s National Provider Identifier (NPI) is 1598907149, issued on Mar 28, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Vassilis Jerry Siomos, M.D. located?
The NPPES record lists a practice address at 350 Heritage Way Ste 2300, Kalispell, MT, 59901. Phone: (406) 752-8456. Providers update this record themselves, so call before visiting.
How can I verify Vassilis Jerry Siomos, M.D.'s license?
NPPES lists Montana license number 41781, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Vassilis Jerry Siomos, M.D. prescribe under Medicare Part D?
In 2024, Vassilis Jerry Siomos, M.D. had 840 Medicare Part D claims for 211 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.