Dennis Gan, DMD
NPI 1891349742 · Dentist · Chicago, IL
Dennis Gan, DMD is a Dentist provider in Chicago, IL (NPI 1891349742).
Provider details
- NPI number
- 1891349742
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- DMD
- Sex
- Male
- Sole proprietor
- No
- License
- 019032293 (IL)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$190 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 13621 S Route 59Plainfield, IL 60544-9701Phone: (815) 673-7842
- 3320a Chicago RdSouth Chicago Heights, IL 60411-5423Phone: (708) 248-5034
Registry dates
- Enumerated
- 2019-07-29
- Last updated
- 2020-12-20
- Certified
- 2020-12-20
Frequently asked questions
- What is Dennis Gan's NPI number?
- Dennis Gan's National Provider Identifier (NPI) is 1891349742, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Gan's specialty?
- Dennis Gan is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Dennis Gan located?
- Dennis Gan's practice location on file with NPPES is 1525 E 53rd St Ste 734, Chicago, IL 60615-4575.
- What is Dennis Gan's phone number?
- The practice phone number listed in the NPPES registry for Dennis Gan is (857) 574-0150.
- Is Dennis Gan's NPI active?
- Yes — Dennis Gan's NPI (1891349742) is active in the NPPES registry as of the last update on 2020-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.