DR. JOSIAH AARON VALK DO
NPI 1619534963
Orthopaedic Surgery in San Diego, CA
About Dr. Josiah Aaron Valk Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOSIAH AARON VALK DO (NPI 1619534963) is an individual orthopaedic surgery provider in San Diego, California, licensed in California (20A22266) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, is affiliated with Lakeland Hospital, St Joseph, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Josiah Aaron Valk Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Josiah Valk reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92108
- Reassigned Medicare billing, California enrollment
- 85 clinicians in this Medicare group
Bridgman, MI 49106
- Reassigned Medicare billing, Michigan enrollment
- 724 clinicians in this Medicare group
Saint Joseph, MI 49085
- Reassigned Medicare billing, Michigan enrollment
- 15 clinicians in this Medicare group
Royal Oak, MI 48073
- Reassigned Medicare billing, Michigan enrollment
- 1,030 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lakeland Hospital, St Joseph
Acute Care Hospitals · St Joseph, MICorewell Health Watervliet Hospital
Acute Care Hospitals · Watervliet, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92121 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN DIEGO, CA 92121
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Josiah Valk's NPI number?
The NPI number for Josiah Valk is 1619534963. It was assigned to this individual provider in the NPPES registry on May 22, 2019.
Where is Josiah Valk located?
Josiah Valk practices at 4445 Eastgate Mall Ste 105, San Diego, CA 92121. The listed phone number is (619) 229-5018.
What is Josiah Valk's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Josiah Valk enrolled in Medicare?
Yes. Josiah Valk is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Josiah Valk's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Josiah Valk reassigns Medicare benefits to 4 organizations: Synergy Orthopedic Specialists, Inc. (San Diego, CA), Lakeland Medical Practices (Bridgman, MI), Southwest Michigan Center For Orthopaedic And Sports Medicine P (Saint Joseph, MI) and Beaumont Medical Group- Specialty Services (Royal Oak, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Josiah Valk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Josiah Valk accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Josiah Valk as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Josiah Valk affiliated with any hospitals?
According to CMS data, Josiah Valk is affiliated with Lakeland Hospital, St Joseph and Corewell Health Watervliet Hospital.
When was this NPI record last updated?
The NPPES record for Josiah Valk was last updated on July 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Josiah Aaron Valk, DO · NPI 1619534963
Orthopaedic Surgery physician in San Diego, California. Individual provider, active in the CMS NPPES registry since May 22, 2019.
## Identity
- **NPI:** 1619534963 (Entity type: Individual)
- **Enumerated:** May 22, 2019
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 20A22266 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4445 EASTGATE MALL STE 105, San Diego, CA 92121-1979
- **Phone:** (619) 229-5018
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Synergy Orthopedic Specialists, Inc. (NPI 1114282779, San Diego, CA); Lakeland Medical Practices (NPI 1568232247, Bridgman, MI); Southwest Michigan Center For Orthopaedic And Sports Medicine P (NPI 1104913094, Saint Joseph, MI); Beaumont Medical Group- Specialty Services (NPI 1578072906, Royal Oak, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2019
## Record status
- **NPPES last updated:** July 9, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1619534963) · Data from the CMS NPPES public registry.