Josiah Aaron Valk, DO
Orthopaedic Surgery Physician · San Diego, CA
Josiah Aaron Valk, DO is an orthopaedic surgery physician with a practice address in San Diego, California, and NPI 1619534963, issued on May 22, 2019. Check the license (California 20A22266, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Josiah Aaron Valk
- Credential
- DO
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 20A22266 CA
5101026685 MI
5151013492 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4445 Eastgate Mall Ste 105, San Diego, CA 92121
- Phone
- (619) 229-5018
- Enumerated
- May 22, 2019
- Record last updated
- Jul 9, 2025
- Medicare enrollment
- Enrolled (PECOS I20220622002050); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 2019
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 4445 Eastgate Mall Ste 105
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer DulmesOccupational Therapist1447679758
- Sean GaoOrthopaedic Surgery Physician1063944270
- Michael LundstromOccupational Therapist1598185571
- Alexander MirthPhysical Therapist1588537757
- Michael Pomerantz, MDOrthopaedic Hand Surgery Physician1356505705
Verify Josiah Aaron Valk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A22266Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 81 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: $24,091.80
31 payments; by number, the most common kind was food and beverage; the largest payer was Arthrex, 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 3 group practices
- Lakeland Medical PracticesNiles, MI
- Southwest Michigan Center For Orthopaedic And Sports Medicine PSaint Joseph, MI
- Synergy Orthopedic Specialists IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Josiah Aaron Valk among 2,276 orthopaedic surgery physician records in California
Josiah Aaron Valk, DO is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 92% of them.
- NPI issued2019 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2019 · median 2003 among the 1,347 with a school on file
- Record last updated2025 · 66% 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 California 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 California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in San Diego → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Obiajulu AghaSan Diego, CA 921211871120113
- Daniel Brereton, D.O.San Diego, CA 921211487093951
- Sean GaoSan Diego, CA 921211063944270
- John Grotting, M.D.San Diego, CA 921211376838680
- James McClurg, M.D.San Diego, CA 921211306817895
- James Moitoza, M.D.San Diego, CA 921211538153747
- Lan Nguyen, D.O.San Diego, CA 921211184785016
- David Petersen, MDSan Diego, CA 921211750363149
Common questions
What is Josiah Aaron Valk, DO's NPI number?
Josiah Aaron Valk, DO's National Provider Identifier (NPI) is 1619534963, issued on May 22, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Josiah Aaron Valk, DO located?
The NPPES record lists a practice address at 4445 Eastgate Mall Ste 105, San Diego, CA, 92121. Phone: (619) 229-5018. Providers update this record themselves, so call before visiting.
How can I verify Josiah Aaron Valk, DO's license?
NPPES lists California license number 20A22266, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Josiah Aaron Valk, DO's MIPS final score?
The 2023 MIPS final score is 81 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.