Aaron Isamu Karlen, M.D., J.D.
Orthopaedic Hand Surgery Physician · Salem, OR
Aaron Isamu Karlen, M.D., J.D. is an orthopaedic hand surgery physician with a practice address in Salem, Oregon, and NPI 1104184415, issued on Apr 25, 2012. Check the license (Oregon MD187069, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Aaron Isamu Karlen
- Credential
- M.D., J.D.
- Primary taxonomy
- Orthopaedic Hand Surgery Physician 207XS0106X
- License number
- MD187069 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1600 State St, Salem, OR 97301
- Phone
- (503) 540-6300
- Enumerated
- Apr 25, 2012
- Record last updated
- Jun 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180815000417); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest orthopaedic hand surgery physician records → All 35 in Oregon → Look up another NPI →
Also registered at 1600 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christa AntrimOrthopedic Physical Therapist1538337977
- Magdalena Banasiak, MDNeurological Surgery Physician1134143563
- Nicole Bangs, P.A.-C.Surgical Physician Assistant1336242536
- Kevin Bell, PA-CSurgical Physician Assistant1033146402
- Erin Bjorklund, N.P.Nurse Practitioner1952342354
- Earl Brewley, M.D.Orthopaedic Surgery Physician1770928590
Verify Aaron Isamu Karlen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD187069Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average orthopaedic hand surgery physician in 2024
278 Medicare Part D claims for 161 beneficiaries, against an average of 186 among the 2,203 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 218 claims were for opioids.
Most prescribed
- Oxycodone Hcl96 claims
- Hydrocodone-Acetaminophen57 claims
- Tramadol Hcl50 claims
- Diclofenac Sodium26 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 MIPS final score for 2023 (Medicare payment program): 66.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $77.18
2 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 1,819 providers of this specialty with any payment received $5,529.86 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
- Salem HealthSalem, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Isamu Karlen among 35 orthopaedic hand surgery physician records in Oregon
Aaron Isamu Karlen, M.D., J.D. is one of 35 orthopaedic hand surgery physician records with a practice address in Oregon. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2012 · median 2007 among the 29 with a school on file
- Record last updated2019 · 31% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0106X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Hand Surgery Physician providers in Oregon
There are 35 orthopaedic hand surgery physician records in Oregon.
All 35 in Oregon → Every provider in Salem → Orthopaedic Hand Surgery Physician nationwide →
The 8 orthopaedic hand surgery physician records with the nearest ZIP codes
- Jeffrey Knight, MDSalem, OR 973011790941920
- Allison Mitchell, MDSalem, OR 973011003279415
- Derek BondPortland, OR 972391669925004
- Wendy Hughes, M.D.Portland, OR 972391619080595
- Adam Mirarchi, MDPortland, OR 972391417931304
- Robert Orfaly, MDPortland, OR 972391316015654
- Samuel Cohen-Tanugi, MDPortland, OR 972271467959270
- Lucie Krenek, MDPortland, OR 972271801125521
Common questions
What is Aaron Isamu Karlen, M.D., J.D.'s NPI number?
Aaron Isamu Karlen, M.D., J.D.'s National Provider Identifier (NPI) is 1104184415, issued on Apr 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Isamu Karlen, M.D., J.D. located?
The NPPES record lists a practice address at 1600 State St, Salem, OR, 97301. Phone: (503) 540-6300. Providers update this record themselves, so call before visiting.
How can I verify Aaron Isamu Karlen, M.D., J.D.'s license?
NPPES lists Oregon license number MD187069, 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 Aaron Isamu Karlen, M.D., J.D. prescribe under Medicare Part D?
In 2024, Aaron Isamu Karlen, M.D., J.D. had 278 Medicare Part D claims for 161 beneficiaries; the average among orthopaedic hand surgery physician prescribers was 186. Part D covers Medicare prescriptions only.
What is Aaron Isamu Karlen, M.D., J.D.'s MIPS final score?
The 2023 MIPS final score is 66.8 of 100. 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.