NPPES file of Aug 9, 2026

Eric Tseng, O.D,

Optometrist · Chicago, IL

Eric Tseng, O.D, is an optometrist with a practice address in Chicago, Illinois, and NPI 1629233580, issued on Jul 21, 2008. Check the license (Illinois 046010071, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1629233580
Name
Eric Tseng
Credential
O.D,
Primary taxonomy
Optometrist 152W00000X
License number
046010071 IL
Self-reported in NPPES; status is on the state search
Practice location
9928 S Western Ave, Chicago, IL 60643
Phone
(773) 303-8279
Enumerated
Jul 21, 2008
Record last updated
Apr 23, 2026
Fax
(773) 681-7119
Medicaid IDs
046010071 IL
1629233580 IL
Medicare enrollment
Enrolled (PECOS I20100109000348); accepts Medicare assignment
Medical or professional school
Illinois College Of Optometry At Chicago, 2008
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest optometrist records → All 2,697 in Illinois → Look up another NPI →

Also registered at 9928 S Western Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Susan Tseng, ODOptometrist1750581328

Verify Eric Tseng in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 046010071    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

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4% fewer Medicare Part D claims than the average optometrist in 2024

266 Medicare Part D claims for 83 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.

  1. Eric Tseng266
  2. Specialty average277

Most prescribed

  1. Latanoprost159 claims
  2. Timolol Maleate25 claims
  3. Brimonidine Tartrate15 claims
  4. Azelastine Hcl13 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Eric Tseng among 2,697 optometrist records in Illinois

Eric Tseng, O.D, is one of 2,697 optometrist records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 52% of them.

  • NPI issued2008 · 52% of these records are older, 44% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2008 · median 2008 among the 1,513 with a school on file
  • Record last updated2026 · 68% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Optometrist providers in Illinois

There are 2,697 optometrist records in Illinois.

All 2,697 in Illinois → Every provider in Chicago → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Marcia Blake, O.D.Chicago, IL 606431053490219
  2. Karina Fulton, O.DChicago, IL 606431801183660
  3. Camilla Joe, O.D.Chicago, IL 606431598210213
  4. Jennifer KoChicago, IL 606431518662733
  5. John Shermulis, O.D.Chicago, IL 606431336218007
  6. Susan Tseng, ODChicago, IL 606431750581328
  7. John Bellen, O.D.Chicago, IL 606441306973474
  8. Kyle Burgers, O.D.Chicago, IL 606421881907517

Common questions

What is Eric Tseng, O.D,'s NPI number?

Eric Tseng, O.D,'s National Provider Identifier (NPI) is 1629233580, issued on Jul 21, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Eric Tseng, O.D, located?

The NPPES record lists a practice address at 9928 S Western Ave, Chicago, IL, 60643. Phone: (773) 303-8279. Providers update this record themselves, so call before visiting.

How can I verify Eric Tseng, O.D,'s license?

NPPES lists Illinois license number 046010071, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Eric Tseng, O.D, prescribe under Medicare Part D?

In 2024, Eric Tseng, O.D, had 266 Medicare Part D claims for 83 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.