Douglas Fredrick Clark, O.D.
Optometrist · Austin, TX
Douglas Fredrick Clark, O.D. is an optometrist with a practice address in Austin, Texas, and NPI 1336185628, issued on Jun 22, 2006. Check the license (Texas 02529TG, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Douglas Fredrick Clark
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 02529TG TX
Self-reported in NPPES; status is on the state search - Practice location
- 5501 B North IH 35, Austin, TX 78723
- Phone
- (512) 452-5735
- Enumerated
- Jun 22, 2006
- Record last updated
- Jun 16, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (512) 452-3119
- Medicaid ID
- 1335416-04 TX
- Medicare enrollment
- Enrolled (PECOS I20101201000753); may accept Medicare assignment
- Medical or professional school
- Indiana University - School Of Optometry, 1976
- Entity
- Type 1 · individual
8 nearest optometrist records → All 5,006 in Texas → Look up another NPI →
Also registered at 5501 B North IH 35
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Johnnie Knowles, O.D.Optometrist1831135151
Verify Douglas Fredrick Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license 02529TGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average optometrist in 2024
166 Medicare Part D claims for 37 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Latanoprost67 claims
- Vyzulta23 claims
- Timolol Maleate19 claims
- Dorzolamide-Timolol17 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.
Bills Medicare through 2 group practices
- Aeg Texas Professional PLLCAustin, TX
- Drs. Amin, Clark And Associate Optometrists, PAAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Fredrick Clark among 5,006 optometrist records in Texas
Douglas Fredrick Clark, O.D. is one of 5,006 optometrist records with a practice address in Texas. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 65% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1976 · median 2010 among the 2,894 with a school on file
- Record last updated2010 · 59% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Texas
There are 5,006 optometrist records in Texas.
All 5,006 in Texas → Every provider in Austin → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Norin Ali, ODAustin, TX 787231487266748
- Opal Amin, ODAustin, TX 787231659561074
- Darcy Grostick, O.D.Austin, TX 787231922012814
- Johnnie Knowles, O.D.Austin, TX 787231831135151
- Halie LamAustin, TX 787231164313128
- Richard Maybury, O.D.Austin, TX 787231114977709
- Tammy Nguyen, ODAustin, TX 787231073179891
- Karine Ovadia Combe, ODAustin, TX 787231043028897
Common questions
What is Douglas Fredrick Clark, O.D.'s NPI number?
Douglas Fredrick Clark, O.D.'s National Provider Identifier (NPI) is 1336185628, issued on Jun 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Fredrick Clark, O.D. located?
The NPPES record lists a practice address at 5501 B North IH 35, Austin, TX, 78723. Phone: (512) 452-5735. Providers update this record themselves, so call before visiting.
How can I verify Douglas Fredrick Clark, O.D.'s license?
NPPES lists Texas license number 02529TG, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Douglas Fredrick Clark, O.D. prescribe under Medicare Part D?
In 2024, Douglas Fredrick Clark, O.D. had 166 Medicare Part D claims for 37 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.
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.