Greg L. Thorgaard, M.D.
Ophthalmology Physician · Ottumwa, IA
Greg L. Thorgaard, M.D. is an ophthalmology physician with a practice address in Ottumwa, Iowa, and NPI 1770585366, issued on Aug 12, 2005. Check the license (Iowa 24334, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Greg L. Thorgaard
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 24334 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1005 Pennsylvania Ave, Ottumwa, IA 52501
- Phone
- (641) 682-8571
- Enumerated
- Aug 12, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (641) 682-8573
- Medicaid ID
- 2274084 IA
- Medicare enrollment
- Enrolled (PECOS I20101019000889); may accept Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 220 in Iowa → Look up another NPI →
Also registered at 1005 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Greg L. Thorgaard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 24334Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,102 Medicare Part D claims for 207 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Latanoprost474 claims
- Timolol Maleate126 claims
- Lumigan86 claims
- Dorzolamide-Timolol69 claims
- Restasis42 claims
- Cyclosporine35 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.
Greg L. Thorgaard among 220 ophthalmology physician records in Iowa
Greg L. Thorgaard, M.D. is one of 220 ophthalmology physician records with a practice address in Iowa. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 75% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1983 · median 2006 among the 123 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Iowa
There are 220 ophthalmology physician records in Iowa.
All 220 in Iowa → Every provider in Ottumwa → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Norman Hutchison, M.D.Ottumwa, IA 525011023010618
- Lee Birchansky, MDCedar Rapids, IA 524021518951433
- Elizabeth Gauger, M.D.Cedar Rapids, IA 524021285950915
- Jordan Gross, M.D.Cedar Rapids, IA 524021245658673
- Michael Hall, MDCedar Rapids, IA 524021447208889
- Steven Jacobs, MDCedar Rapids, IA 524021881642254
- Jillian Litchfield, DOCedar Rapids, IA 524021679150569
- Jeffrey Maassen, MDCedar Rapids, IA 524021124065883
Common questions
What is Greg L. Thorgaard, M.D.'s NPI number?
Greg L. Thorgaard, M.D.'s National Provider Identifier (NPI) is 1770585366, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Greg L. Thorgaard, M.D. located?
The NPPES record lists a practice address at 1005 Pennsylvania Ave, Ottumwa, IA, 52501. Phone: (641) 682-8571. Providers update this record themselves, so call before visiting.
How can I verify Greg L. Thorgaard, M.D.'s license?
NPPES lists Iowa license number 24334, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Greg L. Thorgaard, M.D. prescribe under Medicare Part D?
In 2024, Greg L. Thorgaard, M.D. had 1,102 Medicare Part D claims for 207 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.