Alan Chow, M.D.
NPI 1891802096 · Ophthalmology Physician · Glen Ellyn, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Chow, M.D. is a Ophthalmology Physician provider in Glen Ellyn, IL (NPI 1891802096).
Provider details
- NPI number
- 1891802096
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,383 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Exam to Measure Eye Deviation and Range of Motion92060 | 263 | $64 |
| Imaging of Optic Nerve92133 | 244 | $36 |
| Extended Exam of the Back Part of the Eye With Optic Nerve Drawing92202 | 223 | $16 |
| Established Patient Complete Exam of Visual System92014 | 193 | $128 |
| Established Patient Problem Focused Exam of Visual System92012 | 188 | $91 |
| Photography of the Retina92250 | 122 | $38 |
| Exam of Visual Field With Extended Testing |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 183 | 35 |
| Timolol Maleate | 119 | 28 |
| Brimonidine Tartrate | 26 | — |
| Dorzolamide Hcl | 15 | — |
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-24
- Last updated
- 2007-10-31
Frequently asked questions
- What is Alan Chow's NPI number?
- Alan Chow's National Provider Identifier (NPI) is 1891802096, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Chow's specialty?
- Alan Chow is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Chow located?
- Alan Chow's practice location on file with NPPES is 386 Pennsylvania Ave Ste 3n, Glen Ellyn, IL 60137-4323.
- What is Alan Chow's phone number?
- The practice phone number listed in the NPPES registry for Alan Chow is (630) 858-4411.
- Does Alan Chow accept Medicare?
- Alan Chow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Chow's NPI active?
- Yes — Alan Chow's NPI (1891802096) is active in the NPPES registry as of the last update on 2007-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.