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Gregory V. Sierminski, DDS

  • Wonder Lake, IL
  • Dentist
NPI1255386801
Affiliated sites
1
State license
1
Year NPI issued
2006
Practice address
7442 Hancock Drive, Crystal Lake, IL 60097
Practice phone
Call (815) 728-0100
Professional email
Get professional email
Personal email
Get personal email
Mobile number
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Social profiles

Primary practice

Gregory Sierminski, DDS PC Dental

Physician office · Crystal Lake, Illinois

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Gregory V. Sierminski is a dentist in Wonder Lake, Illinois

Gregory Sierminski practices at Gregory Sierminski, DDS PC Dental in Crystal Lake, Illinois.

Gregory Sierminski's NPI, 1255386801, was assigned on May 23, 2006. Gregory Sierminski holds Illinois license 19015910.

NPI and contact details
NPI
1255386801NPI Registry (opens in a new tab)
NPI enumeration date
May 23, 2006
NPI status
Active
Practice phone
(815) 728-0100
Professional email
Get email
Personal email
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Mobile number
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Sex
Male

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data

Gregory V. Sierminski practices at Gregory Sierminski, DDS PC Dental in Crystal Lake, Illinois

Gregory Sierminski's primary practice is Gregory Sierminski, DDS PC Dental, at 7442 Hancock Drive, Crystal Lake, IL 60097. The practice phone is (815) 728-0100.

  • Gregory Sierminski, DDS PC Dental
    7442 Hancock Drive, Crystal Lake, IL 60097Phone(815) 728-0100

Source: Dmand AI Affiliation Data

Gregory V. Sierminski is affiliated with 1 site of care

Gregory Sierminski's primary practice is Gregory Sierminski, DDS PC Dental in Crystal Lake, Illinois.

Gregory Sierminski, DDS PC DentalPhysician office · Crystal Lake, IllinoisPrimary

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Gregory V. Sierminski's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Sierminski practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Gregory Sierminski, DDS PC DentalAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Gregory V. Sierminski is one of 1,844 dentists in Illinois

Dentist is Gregory Sierminski's primary specialty in the NPI Registry, under taxonomy code 122300000X. Gregory Sierminski is licensed in Illinois.

Specialties and state licenses

  • Dentist, IllinoisPrimaryLicense 19015910 · taxonomy 122300000X

Dentists near Gregory Sierminski

Counts of dentists with a Dmand AI profile, by place and practice. Each opens the list.

1,844dentists in Illinois

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Gregory V. Sierminski's patients have a median age of 74

Across all payers, Dmand AI patient panel data puts Gregory Sierminski's median patient age at 74, with 0% women.

Gregory Sierminski's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 74

Patient panel by sex, all payers

  • Women0%
  • Men100%

Source: Dmand AI Patient Panel Data

Sources for Gregory V. Sierminski's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation Data
Medicare patients and the all-payer patient panelDmand AI Patient Panel Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Gregory V. Sierminski

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Gregory V. Sierminski's NPI number?

Gregory V. Sierminski's NPI number is 1255386801. It was assigned on May 23, 2006, and it is active in the NPI Registry.

What does Gregory V. Sierminski specialize in?

Gregory V. Sierminski is a dentist in Wonder Lake, Illinois. The primary specialty in the NPI Registry is Dentist (taxonomy code 122300000X).

Where does Gregory V. Sierminski practice?

Gregory Sierminski practices at 7442 Hancock Drive, Crystal Lake, IL 60097. Gregory Sierminski's primary practice is Gregory Sierminski, DDS PC Dental in Crystal Lake, Illinois.

What is Gregory V. Sierminski's office phone number?

The practice phone on file for Gregory Sierminski is (815) 728-0100.

What is Gregory V. Sierminski's medical license number?

Gregory Sierminski holds Illinois license 19015910.

How long has Gregory V. Sierminski been practicing?

Gregory Sierminski's NPI was assigned in 2006.

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