Alexander Tzanos, D.D.S.
NPI 1821250630 · Periodontics · Crystal Lake, IL
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Tzanos, D.D.S. is a Periodontics provider in Crystal Lake, IL (NPI 1821250630).
Provider details
- NPI number
- 1821250630
- Entity type
- Individual
- Primary specialty
- PeriodonticsDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- No
- License
- 019027377 (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
18 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 123 | 89 |
| Chlorhexidine Gluconate | 85 | 68 |
| Ibuprofen | 72 | 63 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 70 | 65 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 37 | 31 |
| Metronidazole | 29 | 21 |
| Clindamycin Hcl | 18 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$209 across 3 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)
- 220 N Smith St Ste 125Palatine, IL 60067-2488Phone: (847) 358-3939
- 1481 W 10th StIndianapolis, IN 46202-2803Phone: (317) 988-2022
Registry dates
- Enumerated
- 2008-07-02
- Last updated
- 2021-05-28
- Certified
- 2021-05-28
Frequently asked questions
- What is Alexander Tzanos's NPI number?
- Alexander Tzanos's National Provider Identifier (NPI) is 1821250630, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Tzanos's specialty?
- Alexander Tzanos is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).
- Where is Alexander Tzanos located?
- Alexander Tzanos's practice location on file with NPPES is 411 E Congress Pkwy Ste D, Crystal Lake, IL 60014-6247.
- What is Alexander Tzanos's phone number?
- The practice phone number listed in the NPPES registry for Alexander Tzanos is (814) 455-6550.
- Does Alexander Tzanos accept Medicare?
- Alexander Tzanos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Tzanos's NPI active?
- Yes — Alexander Tzanos's NPI (1821250630) is active in the NPPES registry as of the last update on 2021-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.