Gregory S. Koenig, O.D.
Optometrist · Fernley, NV
Gregory S. Koenig, O.D. is an optometrist with a practice address in Fernley, Nevada, and NPI 1255301388, issued on Jan 23, 2006. Check the license (Nevada 321, as entered in NPPES) with the Nevada board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory S. Koenig
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 321 NV
Self-reported in NPPES; status is on the state search - Practice location
- 415 US Highway 95A S, Fernley, NV 89408
- Phone
- (775) 575-1966
- Enumerated
- Jan 23, 2006
- Record last updated
- Jun 10, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (775) 575-1967
- Medicaid ID
- 002501100 NV
- Medicare enrollment
- Enrolled (PECOS I20110912000403); accepts Medicare assignment
- Medical or professional school
- Pacific University - College Of Optometry, 1996
- Entity
- Type 1 · individual
8 nearest optometrist records → All 550 in Nevada → Look up another NPI →
Also registered at 415 US Highway 95A S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marricella AdamsClinical Social Worker1548739477
- Sarah Braswell, LCSW, CADCMental Health Counselor1467921494
- Jennifer BrownRehabilitation Counselor1982050761
- Trina CastonguayMental Health Counselor1730546714
- Glenda DazeyMental Health Counselor1700272390
- Justine Enochs, MFT-IMarriage & Family Therapist1851788186
Verify Gregory S. Koenig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Nevada board licenses this profession
Search for license 321Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average optometrist in 2024
105 Medicare Part D claims for 39 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.
Most prescribed
- Latanoprost52 claims
- Timolol Maleate15 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: $1,779.28
10 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. 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
- Robertson And Koenig LtdFernley, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory S. Koenig among 550 optometrist records in Nevada
Gregory S. Koenig, O.D. is one of 550 optometrist records with a practice address in Nevada. 76% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 68% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1996 · median 2010 among the 332 with a school on file
- Record last updated2008 · 61% 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 Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 optometrist records list a practice address in Fernley
They are 7 of the 191 NPPES records with a practice address in Fernley, and 550 optometrist records in Nevada.
All 550 in Nevada → Every provider in Fernley → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Heather Carlton, ODFernley, NV 894081518606094
- Jeremy Einowski, DOCTOR OF OPTOMETRYFernley, NV 894081194386409
- Curtiss Johnson, ODFernley, NV 894081245234921
- Kristina Petty, O.D.Fernley, NV 894081538479365
- Carl Robertson, O.D.Fernley, NV 894081659341782
- Irene Yang, ODFernley, NV 894081578431102
- Richard Baumann, O.D.Gardnerville, NV 894101528193281
- Amanda Brewer, ODGardnerville, NV 894101033630660
Common questions
What is Gregory S. Koenig, O.D.'s NPI number?
Gregory S. Koenig, O.D.'s National Provider Identifier (NPI) is 1255301388, issued on Jan 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Koenig, O.D. located?
The NPPES record lists a practice address at 415 US Highway 95A S, Fernley, NV, 89408. Phone: (775) 575-1966. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Koenig, O.D.'s license?
NPPES lists Nevada license number 321, as entered by the provider. Search the Nevada board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory S. Koenig, O.D. prescribe under Medicare Part D?
In 2024, Gregory S. Koenig, O.D. had 105 Medicare Part D claims for 39 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.