Nicholas Martin Onken, O.D.
Optometrist · Birmingham, AL
Nicholas Martin Onken, O.D. is an optometrist with a practice address in Birmingham, Alabama, and NPI 1639506397, issued on Sep 26, 2013. Check the license (Alabama R-237-TA-A03, as entered in NPPES) with the Alabama board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nicholas Martin Onken
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- R-237-TA-A03 AL
Self-reported in NPPES; status is on the state search - Practice location
- 2019 Highland Ave S, Birmingham, AL 35205
- Phone
- (205) 328-2020
- Enumerated
- Sep 26, 2013
- Record last updated
- Feb 22, 2022
- Fax
- (205) 918-9096
- Medicare enrollment
- Enrolled (PECOS I20141203000563); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 2013
- Entity
- Type 1 · individual
Also registered at 2019 Highland Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patricia Benjamin, O.D.Optometrist1073588869
Verify Nicholas Martin Onken in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Alabama board licenses this profession
Search for license R-237-TA-A03Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $87.67
1 payment: food and beverage; the largest payer was CooperVision Inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- University OF Alabama AT BirminghamBirmingham, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
168 optometrist records list a practice address in Birmingham
They are 168 of the 15,795 NPPES records with a practice address in Birmingham, and 874 optometrist records in Alabama.
All 168 in Birmingham → All 874 in Alabama → Every provider in Birmingham →
Other optometrist records in Alabama
- Juanakee Adams, O.D.Birmingham, AL1356322218
- Ronald Adcock, ODDaphne, AL1235178070
- Ronald Aderholt, O.D.Oxford, AL1568560233
- Tyrus Agee, ODFultondale, AL1689340564
- Elise Agostinelli, ODBirmingham, AL1013528579
- Lauren Albert, O.D.Dothan, AL1356790869
- Brandon AldertonMadison, AL1407464043
- Salmedina Alic, ODSaraland, AL1548841125
- Amy Allen, ODOpelika, AL1144944877
- Larry Allen, O.D.Fort Payne, AL1497846877
Common questions
What is Nicholas Martin Onken, O.D.'s NPI number?
Nicholas Martin Onken, O.D.'s National Provider Identifier (NPI) is 1639506397, issued on Sep 26, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Martin Onken, O.D. located?
The NPPES record lists a practice address at 2019 Highland Ave S, Birmingham, AL, 35205. Phone: (205) 328-2020. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Martin Onken, O.D.'s license?
NPPES lists Alabama license number R-237-TA-A03, as entered by the provider. Search the Alabama board that licenses this profession; the NPPES record confirms identity 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.