Cay Michael Mierisch, MD
Orthopaedic Surgery Physician · Corvallis, OR
Cay Michael Mierisch, MD is an orthopaedic surgery physician with a practice address in Corvallis, Oregon, and NPI 1083688931, issued on Feb 16, 2006. Check the license (Oregon MD205645, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cay Michael Mierisch
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- MD205645 OR
0101-237955 VA
0101237955 VA
Self-reported in NPPES; status is on the state search - Practice location
- 3620 NW Samaritan Dr Ste 201, Corvallis, OR 97330
- Phone
- (541) 768-6300
- Enumerated
- Feb 16, 2006
- Record last updated
- Aug 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 1083688931 VA
- Medicare enrollment
- Enrolled (PECOS I20210806001469); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 335 in Oregon → Look up another NPI →
Also registered at 3620 NW Samaritan Dr Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan Barthel, OTR, CHTHand Physical Therapist1174566293
- Erin Cooley, M.D., F.A.C.S.Surgery of the Hand (Surgery) Physician1881730554
- Carlie FalkPhysician Assistant1336867878
- Danielle Jernberg, PA-CPhysician Assistant1851026314
- Sydney Johnstone, PA-CPhysician Assistant1447576541
- Jenna MihelichPhysician Assistant1871313262
Verify Cay Michael Mierisch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD205645Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
38 Medicare Part D claims for 21 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Gabapentin11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 98.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $675.25
8 payments; by number, the most common kind was food and beverage; the largest payer was Steelhead Surgical Inc. The 15,003 providers of this specialty with any payment received $23,022.89 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 2 group practices
- Albany General HospitalAlbany, OR
- Good Samaritan Hospital CorvallisCorvallis, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cay Michael Mierisch among 335 orthopaedic surgery physician records in Oregon
Cay Michael Mierisch, MD is one of 335 orthopaedic surgery physician records with a practice address in Oregon. 61% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 40% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated1994 · median 2002 among the 165 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Oregon
There are 335 orthopaedic surgery physician records in Oregon.
All 335 in Oregon → Every provider in Corvallis → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Edward Bynum, D.O.Corvallis, OR 973301528017563
- John Erkkila, M.D.Corvallis, OR 973301467401414
- Jonathan Evans, D.O.Corvallis, OR 973301760517478
- Jacqueline Krumrey, MDCorvallis, OR 973301366411241
- Jason Lin, M.D.Corvallis, OR 973301902028111
- Leon Malkin, MDCorvallis, OR 973301134142649
- Scott McAtee, M.D.Corvallis, OR 973301255381141
- Kit McCalla, D.O., MBACorvallis, OR 973301487626313
Common questions
What is Cay Michael Mierisch, MD's NPI number?
Cay Michael Mierisch, MD's National Provider Identifier (NPI) is 1083688931, issued on Feb 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cay Michael Mierisch, MD located?
The NPPES record lists a practice address at 3620 NW Samaritan Dr Ste 201, Corvallis, OR, 97330. Phone: (541) 768-6300. Providers update this record themselves, so call before visiting.
How can I verify Cay Michael Mierisch, MD's license?
NPPES lists Oregon license number MD205645, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cay Michael Mierisch, MD prescribe under Medicare Part D?
In 2024, Cay Michael Mierisch, MD had 38 Medicare Part D claims for 21 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Cay Michael Mierisch, MD's MIPS final score?
The 2023 MIPS final score is 98.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.