Gregory G. Kalkofen, OD
Optometrist · Clinton Twp, MI
Gregory G. Kalkofen, OD is an optometrist with a practice address in Clinton Twp, Michigan, and NPI 1669485801, issued on Aug 15, 2006. Check the license (Michigan 4901003953, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory G. Kalkofen
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 4901003953 MI
Self-reported in NPPES; status is on the state search - Practice location
- 42550 Garfield, Clinton Twp, MI 48038
- Phone
- (586) 263-9708
- Enumerated
- Aug 15, 2006
- Record last updated
- Mar 11, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (586) 263-0280
- Medicare enrollment
- Enrolled (PECOS I20100618000721); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,963 in Michigan → Look up another NPI →
Also registered at 42550 Garfield
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheryl Junker, ODOptometrist1023022449
- Donald Lakin, ODOptometrist1023026515
- Robert Shick, ODOptometrist1609883305
Verify Gregory G. Kalkofen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 4901003953Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average optometrist in 2024
311 Medicare Part D claims for 93 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
- Latanoprost129 claims
- Prednisolone Acetate37 claims
- Timolol Maleate34 claims
- Neomycin-Polymyxin-Dexameth15 claims
- Miebo14 claims
- Doxycycline Monohydrate12 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: $77.82
5 payments; by number, the most common kind was 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
- Optometry PCClinton Township, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory G. Kalkofen among 1,963 optometrist records in Michigan
Gregory G. Kalkofen, OD is one of 1,963 optometrist records with a practice address in Michigan. 69% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 58% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1998 · median 2009 among the 1,121 with a school on file
- Record last updated2008 · 68% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Michigan
There are 1,963 optometrist records in Michigan.
All 1,963 in Michigan → Every provider in Clinton Twp → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Michael Breza, ODClinton Twp, MI 480381003974981
- Denise Duffy, O.D.Clinton Twp, MI 480381659721231
- Heather Fairless, O.D.Clinton Twp, MI 480381639234370
- Cheryl Junker, ODClinton Twp, MI 480381023022449
- Donald Lakin, ODClinton Twp, MI 480381023026515
- Barnet Leland, O.D.Clinton Township, MI 480381578656344
- Kyler Popp, ODClinton Township, MI 480381124638606
- Robert Shick, ODClinton Twp, MI 480381609883305
Common questions
What is Gregory G. Kalkofen, OD's NPI number?
Gregory G. Kalkofen, OD's National Provider Identifier (NPI) is 1669485801, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory G. Kalkofen, OD located?
The NPPES record lists a practice address at 42550 Garfield, Clinton Twp, MI, 48038. Phone: (586) 263-9708. Providers update this record themselves, so call before visiting.
How can I verify Gregory G. Kalkofen, OD's license?
NPPES lists Michigan license number 4901003953, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory G. Kalkofen, OD prescribe under Medicare Part D?
In 2024, Gregory G. Kalkofen, OD had 311 Medicare Part D claims for 93 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.