Gregory Siwek, MD
Infectious Disease Physician · Saint Paul, MN
Gregory Siwek, MD is an infectious disease physician with a practice address in Saint Paul, Minnesota, and NPI 1437125317, issued on Feb 28, 2006. Check the license (Minnesota 43054, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Gregory Siwek
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 43054 MN
Self-reported in NPPES; status is on the state search - Practice location
- 401 Phalen Blvd, Saint Paul, MN 55130
- Phone
- (651) 254-7820
- Enumerated
- Feb 28, 2006
- Record last updated
- Jun 20, 2024
- Medicare enrollment
- Enrolled (PECOS I20050818000141); accepts Medicare assignment
- Medical or professional school
- Rowan University School Of Osteopathic Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 216 in Minnesota → Look up another NPI →
Also registered at 401 Phalen Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nermine AbdelwahabInternal Medicine Physician1871158600
- Omobosola Akinsete, M.D.Infectious Disease Physician1891749214
- Rayhaan Akram, MDRheumatology Physician1457871659
- Jonathan AlpernInfectious Disease Physician1568753028
- Mollie Alpern, M.D.Allergy & Immunology Physician1467794644
- Roula Altisheh, M.DAllergy & Immunology Physician1609132125
Verify Gregory Siwek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 43054Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average infectious disease physician in 2024
689 Medicare Part D claims for 111 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Biktarvy147 claims
- Tivicay69 claims
- Descovy64 claims
- Ceftriaxone39 claims
- Cephalexin33 claims
- Ertapenem27 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.
Bills Medicare through one group practice
- Group Health Plan IncSaint Paul, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Siwek among 216 infectious disease physician records in Minnesota
Gregory Siwek, MD is one of 216 infectious disease physician records with a practice address in Minnesota. 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 63% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1999 · median 2007 among the 153 with a school on file
- Record last updated2024 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Minnesota
There are 216 infectious disease physician records in Minnesota.
All 216 in Minnesota → Every provider in Saint Paul → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Omobosola Akinsete, M.D.Saint Paul, MN 551301891749214
- Jonathan AlpernSaint Paul, MN 551301568753028
- Teresa FoxSaint Paul, MN 551301144649005
- Robyn Kaiser, M.D.Saint Paul, MN 551301114105004
- Andrea Shahum, M.D.Saint Paul, MN 551301962668244
- Peter Bornstein, MDSt Paul, MN 551171487611547
- Michael Klevay, MDSaint Paul, MN 551171497849012
- Gary Kravitz, MDSt Paul, MN 551171124085840
Common questions
What is Gregory Siwek, MD's NPI number?
Gregory Siwek, MD's National Provider Identifier (NPI) is 1437125317, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Siwek, MD located?
The NPPES record lists a practice address at 401 Phalen Blvd, Saint Paul, MN, 55130. Phone: (651) 254-7820. Providers update this record themselves, so call before visiting.
How can I verify Gregory Siwek, MD's license?
NPPES lists Minnesota license number 43054, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Siwek, MD prescribe under Medicare Part D?
In 2024, Gregory Siwek, MD had 689 Medicare Part D claims for 111 beneficiaries; the average among infectious disease physician prescribers was 689. 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.