Michael Chaglasian, OD
NPI 1841283330 · Optometrist · Chicago, IL
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chaglasian, OD is a Optometrist provider in Chicago, IL (NPI 1841283330).
Provider details
- NPI number
- 1841283330
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 046008201 (IL)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
170 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 87 | $131 |
| Exam of Visual Field With Extended Testing92083 | 32 | $64 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $94 |
| Imaging of Optic Nerve92133 | 21 | $36 |
Typical Medicare-allowed amounts for these services range $36–$131 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 515 | 110 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 258 | 66 |
| Brimonidine Tartrate | 124 | 27 |
| Timolol Maleate | 67 | 20 |
| Travoprost | 56 | 12 |
| Bimatoprostbrand: Lumigan | 49 | — |
| Brimonidine Tartrate/Timololbrand: Combigan | 47 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$54,221 across 80 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
Registry dates
- Enumerated
- 2005-08-30
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Michael Chaglasian's NPI number?
- Michael Chaglasian's National Provider Identifier (NPI) is 1841283330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chaglasian's specialty?
- Michael Chaglasian is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Michael Chaglasian located?
- Michael Chaglasian's practice location on file with NPPES is 3241 S Michigan Ave, Chicago, IL 60616-3849.
- What is Michael Chaglasian's phone number?
- The practice phone number listed in the NPPES registry for Michael Chaglasian is (312) 949-7211.
- Does Michael Chaglasian accept Medicare?
- Michael Chaglasian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chaglasian's NPI active?
- Yes — Michael Chaglasian's NPI (1841283330) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.