David Ryan Harkema, O.D.
Optometrist · Sparta, MI
David Ryan Harkema, O.D. is an optometrist with a practice address in Sparta, Michigan, and NPI 1457310203, issued on Mar 21, 2006. Check the license (Michigan 49010003629, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- David Ryan Harkema
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 49010003629 MI
Self-reported in NPPES; status is on the state search - Practice location
- 38 N Union St, Sparta, MI 49345
- Phone
- (616) 887-8811
- Enumerated
- Mar 21, 2006
- Record last updated
- May 31, 2023
- Fax
- (616) 887-8789
- Medicare enrollment
- Enrolled (PECOS I20040212000331); accepts Medicare assignment
- Medical or professional school
- Ferris State College - College Of Optometry, 1992
- Entity
- Type 1 · individual
Verify David Ryan Harkema in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 49010003629Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average optometrist in 2024
83 Medicare Part D claims for 33 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Latanoprost26 claims
- Timolol Maleate13 claims
- Bimatoprost12 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: $46.13
1 payment: food and beverage; the largest payer was Sight Sciences, 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.
2 optometrist records list a practice address in Sparta
They are 2 of the 90 NPPES records with a practice address in Sparta, and 1,963 optometrist records in Michigan.
All 2 in Sparta → All 1,963 in Michigan → Every provider in Sparta →
Other optometrist records in Michigan
- Brooke Abbaya, ODTroy, MI1962062968
- Richard Abbott, O.D.Traverse City, MI1295721520
- Hussein AbdulameerAnn Arbor, MI1386340032
- Shaina AbrahamAnn Arbor, MI1649845389
- Suzanne Acanne, O.D.Detroit, MI1093804692
- Thomas Adamczak, O.D.Whitehall, MI1083614911
- Brittany Adams, O.D.Southfield, MI1659754505
- Daniel Adams, ODImlay City, MI1194861310
- James Adams, O.D.Portage, MI1336137397
- Shea Adams, ODGrosse Pointe, MI1710778691
Common questions
What is David Ryan Harkema, O.D.'s NPI number?
David Ryan Harkema, O.D.'s National Provider Identifier (NPI) is 1457310203, issued on Mar 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Ryan Harkema, O.D. located?
The NPPES record lists a practice address at 38 N Union St, Sparta, MI, 49345. Phone: (616) 887-8811. Providers update this record themselves, so call before visiting.
How can I verify David Ryan Harkema, O.D.'s license?
NPPES lists Michigan license number 49010003629, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does David Ryan Harkema, O.D. prescribe under Medicare Part D?
In 2024, David Ryan Harkema, O.D. had 83 Medicare Part D claims for 33 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.