ActinobacteriaAnti-Bacterial AgentsBenzimidazoles
Dr. Justin Kaeen Chang, MD
NPI1316301526PAC ID8325330327
- Medicare services, 2024
- 3,300
- Medicare patients, 2024
- 334
- Part D claims, 2024
- 167
- Publications
- 3
- MIPS score, 2024
- 75
- Practice address
- 1225 N H St, Lompoc, CA 93436
- Practice phone
- Call (805) 736-1253
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lompoc Valley Medical Center
Lompoc, California
Find Dr. Chang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Justin Kaeen Chang is an orthopedic surgeon in Lompoc, California
Dr. Chang practices at Lompoc Valley Medical Center in Lompoc, California.
Dr. Chang's NPI, 1316301526, was assigned on April 13, 2016. Dr. Chang graduated from Tufts University School Of Medicine in 2016. Dr. Chang's California license number on file is A190521.
NPI and contact details
- NPI
- 1316301526NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325330327
- NPI enumeration date
- April 13, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 736-1253
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin Kaeen Chang practices at Lompoc Valley Medical Center in Lompoc, California
Dr. Chang's primary practice is Lompoc Valley Medical Center, at 1225 N H St, Lompoc, CA 93436 in Santa Barbara County. The practice phone is (805) 736-1253.
- Lompoc Valley Medical Center1225 N H St, Lompoc, CA 93436 · Santa Barbara CountyPhone(805) 736-1253
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Justin Kaeen Chang is affiliated with 5 sites of care and 1 medical group
Dr. Chang's primary practice is Lompoc Valley Medical Center in Lompoc, California. Dr. Chang is also affiliated with Lompoc Valley Medical Center. The medical group on file is Lompoc Valley Medical Center. Dmand AI also links Dr. Chang to 2 more home health agencies and 1 group practice or clinic, each named with a free account.
Lompoc Valley Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Justin Kaeen Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lompoc Valley Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Justin Kaeen Chang is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Colorado.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Colorado license
Clinical focus
Dmand AI lists arthritis among the conditions Dr. Chang treats.
Orthopedic surgeons near Dr. Chang
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,056orthopedic surgeons in California
2orthopedic surgeons in Lompoc
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Justin Kaeen Chang billed Medicare for 3,300 services in 2024
CMS data shows 3,300 Medicare services from Dr. Chang across 13 procedure codes in 2024, for 334 Medicare patients. Medicare paid $96,356 for them.
Medicare services, 20243,300
Medicare patients334
Paid by Medicare$96,356
Procedure codes13
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 632024: 2,3263592%
- Office and hospital visits
- 2023: 302024: 6862187%
- Surgery
- 2023: 02024: 200
- Imaging
- 2023: 02024: 47
- Other services
- 2023: 02024: 41
Where Dr. Chang's Medicare services took place, 2024
- In an office3,27399%
- In a facility271%
Dr. Chang compared with the California median for orthopedic surgeons, 2024
- Dr. Chang
- California median
- Medicare services
- 3,300vs 6834.8 times
- Medicare patients
- 334vs 21555% above
- Part D claims
- 134vs 7091% above
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Chang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Justin Kaeen Chang treated 334 Medicare patients in 2024, average age 75
CMS counts 334 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 124 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 26% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 59, with 52% women.
Medicare patients, 2024334
Average age75
Average risk score1.08
Also on Medicaid26%
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women20762%
- Men12738%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis74%
- Diabetes38%
- Mood disorders29%
- Anxiety27%
- Depression25%
- Chronic kidney disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Justin Kaeen Chang wrote 167 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 167 Medicare Part D claims for 58 patients. 99% of them were for generic drugs. CMS names the drug for 134 of them, across 5 drugs with 11 or more claims each, at $1,376 in total drug cost.
Part D claims, 2024167
Drugs named by CMS5
Total drug cost$1,376
Part D patients58
Dr. Chang's Part D claims by kind of drug, 2024
- Generic166 claims99%
- Brand-name and other1 claims1%
Dr. Chang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chang's Part D claims, 2024
- Opioids29%48 of 167 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Justin Kaeen Chang scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Chang for performance year 2024, reported as part of a group. Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 15 procedures of upper limb (arm) arthroscopy (minimally invasive joint repair) by Dr. Chang, more than 55% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Chang ranks in Medicare procedure volume
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 55th percentile15 procedures
- Knee replacement
- 41st percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Justin Kaeen Chang has 3 publications on record
Dmand AI links 3 papers to Dr. Chang in 2018. The most frequent topics are Anti-Bacterial Agents, Benzimidazoles and Clostridioides difficile. Dr. Chang's most frequent co-authors are Justin P. Chang, MD, Justin Chang, MD and David R. Snydman, MD.
Papers3
Topics Dr. Chang writes about most
- Anti-Bacterial Agents
- Benzimidazoles
- Clostridioides difficile
- Clostridium Infections
- Pyridines
- Vancomycin
Dr. Chang's most frequent co-authors
- Justin P. Chang, MD2 shared papers
- Justin Chang, MD2 shared papers
- David R. Snydman, MD2 shared papers
Recent publications by Dr. Chang
J Surg Orthop Adv
Arthroplasty, Replacement, HipClinical CompetenceOrthopedic Procedures
J Antimicrob Chemother
Anti-Bacterial AgentsBenzimidazolesClostridioides difficile
See who Dr. Chang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chang works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Justin Kaeen Chang received $20,974 in industry payments from 2018 to 2025
CMS Open Payments shows 112 general payments to Dr. Chang from 18 drug and device companies from 2018 to 2025. Education make up the largest share, 55% of the total. Gemini Mountain Medical, LLC paid the most, $4,534.
General payments to Dr. Chang by program year, 2018 to 2025
General payments to Dr. Chang by kind, 2018 to 2025
$21Kin total
- Education$11,46755%
- Food and beverage$4,90723%
- Travel and lodging$4,60022%
Companies that paid Dr. Chang the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin Kaeen Chang graduated from Tufts University School Of Medicine
Dr. Chang graduated from Tufts University School Of Medicine in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Justin Kaeen Chang accepts plans from 13 insurance carriers
Dr. Chang is in network with 13 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Alliant Health Plans
- Aspirus Health Plan
- +5 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- PPO8
- HMO6
- Medicare5
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Justin Kaeen Chang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Justin Kaeen Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Justin Kaeen Chang's NPI number?
Dr. Justin Kaeen Chang's NPI number is 1316301526. It was assigned on April 13, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin Kaeen Chang?
Dr. Justin Kaeen Chang is an orthopedic surgeon in Lompoc, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Justin Kaeen Chang practice?
Dr. Chang practices at 1225 N H St, Lompoc, CA 93436. Dr. Chang's primary practice is Lompoc Valley Medical Center in Lompoc, California. Dmand AI also links Dr. Chang to 2 home health agencies and 1 group practice or clinic.
What is Dr. Justin Kaeen Chang's office phone number?
The practice phone on file for Dr. Chang is (805) 736-1253.
What is Dr. Justin Kaeen Chang's medical license number?
Dr. Chang's California license number on file is A190521, one of the licenses on file in 2 states.
Which states has Dr. Justin Kaeen Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California (2023 to 2025) and Colorado (2017 to 2023).
Which hospitals is Dr. Justin Kaeen Chang affiliated with?
Dr. Chang is affiliated with Lompoc Valley Medical Center.
What medical group is Dr. Justin Kaeen Chang part of?
Dr. Chang is linked to Lompoc Valley Medical Center.
Does Dr. Justin Kaeen Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 3,300 services in 2024, and Dr. Chang accepts Medicare assignment.
What is Dr. Justin Kaeen Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Justin Kaeen Chang see?
CMS counts 334 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
What services does Dr. Justin Kaeen Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were injected or infused drug (J7318), injected or infused drug (J3301) and office visit, established patient (99214).
Where did Dr. Justin Kaeen Chang go to medical school?
Dr. Chang graduated from Tufts University School Of Medicine in 2016.
What drugs does Dr. Justin Kaeen Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Meloxicam, Oxycodone HCl and Celecoxib.
Has Dr. Justin Kaeen Chang received payments from drug or device companies?
CMS Open Payments shows $20,974 in general payments to Dr. Chang from 18 companies from 2018 to 2025. The largest total came from Gemini Mountain Medical, LLC.
How long has Dr. Justin Kaeen Chang been practicing?
Dr. Chang graduated from medical school in 2016, 10 years ago.
Does Dr. Justin Kaeen Chang do research?
Dmand AI links 3 publications to Dr. Chang.
Who does Dr. Justin Kaeen Chang publish with?
Dr. Chang's most frequent co-authors are Justin P. Chang, MD (2 shared papers), Justin Chang, MD (2 shared papers) and David R. Snydman, MD (2 shared papers).
What insurance does Dr. Justin Kaeen Chang accept?
Dr. Chang is in network with 13 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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