NPPES file of Aug 9, 2026

Oliver Fischer, M.D.

Retina Specialist (Ophthalmology) Physician · Round Rock, TX

Oliver Fischer, M.D. is a retina specialist (ophthalmology) physician with a practice address in Round Rock, Texas, and NPI 1609238880, issued on Mar 25, 2016. Check the license (Texas T5887, as entered in NPPES) on the Texas Medical Board; 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
1609238880
Name
Oliver Fischer
Credential
M.D.
Primary taxonomy
Retina Specialist (Ophthalmology) Physician 207WX0107X
License numbers
T5887 TX
35682 OK
Self-reported in NPPES; status is on the state search
Practice location
2120 Round Rock Ave Ste 100, Round Rock, TX 78681
Phone
(512) 244-1991
Enumerated
Mar 25, 2016
Record last updated
Jun 8, 2022
Fax
(512) 244-1786
Medicare enrollment
Enrolled (PECOS I20220617001826); accepts Medicare assignment
Medical or professional school
Rush Medical College Of Rush University, 2015
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 retina specialist (ophthalmology) physician records → All 107 in Texas → Look up another NPI →

Also registered at 2120 Round Rock Ave Ste 100

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

  1. Lena Dixit, M.D.Ophthalmology Physician1174816433
  2. Kimberly Golde, M.D.Ophthalmology Physician1457512451
  3. William Kittleman, M.D.Ophthalmology Physician1528060241
  4. Ravi Patel, MDCornea and External Diseases Specialist Physician1912298878

Verify Oliver Fischer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license T5887    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
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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63% fewer Medicare Part D claims than the average retina specialist (ophthalmology) physician in 2024

231 Medicare Part D claims for 83 beneficiaries, against an average of 620 among the 1,449 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.

  1. Oliver Fischer231
  2. Specialty average620

Most prescribed

  1. Prednisolone Acetate69 claims
  2. Ofloxacin56 claims
  3. Dorzolamide-Timolol23 claims
  4. Neomycin-Polymyxin-Dexameth22 claims
  5. Brimonidine Tartrate21 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.

Industry payments in 2024: $631.46

22 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 1,253 providers of this specialty with any payment received $7,667.49 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Oliver Fischer$631.46
  2. Specialty average$7,667.49

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Eactx PLLCTaylor, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Oliver Fischer among 107 retina specialist (ophthalmology) physician records in Texas

Oliver Fischer, M.D. is one of 107 retina specialist (ophthalmology) physician records with a practice address in Texas. 96% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 81% of them.

  • NPI issued2016 · 81% of these records are older, 17% newer
  • In a Medicare fileYes · 96% of these records are
  • In the CMS Doctors and Clinicians fileYes · 90% of these records are
  • Graduated2015 · median 2006 among the 96 with a school on file
  • Record last updated2022 · 30% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0107X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Retina Specialist (Ophthalmology) Physician providers in Texas

There are 107 retina specialist (ophthalmology) physician records in Texas.

All 107 in Texas → Every provider in Round Rock → Retina Specialist (Ophthalmology) Physician nationwide →

The 8 retina specialist (ophthalmology) physician records with the nearest ZIP codes

  1. Isaac Loose, M.D.Austin, TX 787311821075664
  2. Cecilia Sanchez, M.D.Austin, TX 787311376616011
  3. Brian Berger, MDAustin, TX 787501649257312
  4. Hosam Attia, M.D.Mission, TX 785721790955094
  5. John Howe, MDHarlingen, TX 785501235237504
  6. Sanjay Agarwal, M.D.Corpus Christi, TX 784141871575688
  7. Rashed AlhabshanCorpus Christi, TX 784131811316680
  8. Bryan Angle, MDCorpus Christi, TX 784131457323537

Common questions

What is Oliver Fischer, M.D.'s NPI number?

Oliver Fischer, M.D.'s National Provider Identifier (NPI) is 1609238880, issued on Mar 25, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Oliver Fischer, M.D. located?

The NPPES record lists a practice address at 2120 Round Rock Ave Ste 100, Round Rock, TX, 78681. Phone: (512) 244-1991. Providers update this record themselves, so call before visiting.

How can I verify Oliver Fischer, M.D.'s license?

NPPES lists Texas license number T5887, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Oliver Fischer, M.D. prescribe under Medicare Part D?

In 2024, Oliver Fischer, M.D. had 231 Medicare Part D claims for 83 beneficiaries; the average among retina specialist (ophthalmology) physician prescribers was 620. 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.