Dr. Angela An-Chi Chang, MD
- Medicare services, 2024
- 1,641
- Medicare patients, 2024
- 493
- Part D claims, 2024
- 694
- Publications
- 2
- MIPS score, 2024
- 75
- Practice address
- 9834 Genesee Ave, La Jolla, CA 92037
- Practice phone
- Call (858) 453-3133
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
EGL Ambulatory Surgery Center
Surgery Center - Not Medicare-Certified · La Jolla, California
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Angela An-Chi Chang is an otolaryngologist in La Jolla, California
Dr. Chang practices at EGL Ambulatory Surgery Center in La Jolla, California.
Dr. Chang's NPI, 1730382318, was assigned on June 8, 2007. Dr. Chang graduated from David Geffen School of Medicine at UCLA in 2005. Dr. Chang holds California license A100380.
- NPI
- 1730382318NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416126404
- NPI enumeration date
- June 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (858) 453-3133
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Angela An-Chi Chang practices at EGL Ambulatory Surgery Center in La Jolla, California
Dr. Chang's primary practice is EGL Ambulatory Surgery Center, at 9834 Genesee Ave, La Jolla, CA 92037. The practice phone is (858) 453-3133.
- EGL Ambulatory Surgery Center9834 Genesee Ave, La Jolla, CA 92037Phone(858) 453-3133
Source: Dmand AI Affiliation Data
Dr. Angela An-Chi Chang is affiliated with 6 sites of care and 2 medical groups
Dr. Chang's primary practice is EGL Ambulatory Surgery Center in La Jolla, California. Dr. Chang is also affiliated with Scripps Memorial Hospital La Jolla. The medical group on file is Emergency and Acute Care Medical Corporation. Dmand AI also links Dr. Chang to 1 more hospital, 2 group practices and clinics, 1 physician office and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Angela An-Chi Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| EGL Ambulatory Surgery Center | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Angela An-Chi Chang is one of 1,107 otolaryngologists in California
Otolaryngology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Chang is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery. Dr. Chang is licensed in California.
Specialties and state licenses
- Otolaryngology, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, chronic ear infection, chronic nasal allergies, chronic sinusitis, ear eustachian tube disorders, ear infection, endoscopic sinus surgery and hearing loss and impairment among the conditions Dr. Chang treats.
Otolaryngologists near Dr. Chang
Counts of otolaryngologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Angela An-Chi Chang billed Medicare for 1,641 services in 2024
CMS data shows 1,641 Medicare services from Dr. Chang across 11 procedure codes in 2024, for 493 Medicare patients. Medicare paid $142,443 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8642024: 868No change
- Surgery
- 2023: 5992024: 5725%
- Tests and treatments
- 2023: 1,0932024: 18883%
- Other services
- 2023: 252024: 1348%
Dr. Chang compared with the California median for otolaryngologists, 2024
- Dr. Chang
- California median
- Medicare services
- 1,641vs 6662.5 times
- Medicare patients
- 493vs 29667% above
- Part D claims
- 597vs 1185.1 times
Medians across 1,045 otolaryngologists 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other otolaryngologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Angela An-Chi Chang treated 493 Medicare patients in 2024, average age 77
CMS counts 493 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 213 patients. 75% of them have high cholesterol, and 65% have high blood pressure. 10% are also on Medicaid. Their average risk score is 1.14, 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 59% women.
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women28257%
- Men21143%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis42%
- Ischemic heart disease28%
- Osteoporosis25%
- Atrial fibrillation23%
- Diabetes21%
- Cancer20%
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
- Women59%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Angela An-Chi Chang wrote 694 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 694 Medicare Part D claims for 276 patients. 97% of them were for generic drugs. CMS names the drug for 597 of them, across 10 drugs with 11 or more claims each, at $14,091 in total drug cost. In 2023, CMS named 529 claims across 12 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic672 claims97%
- Brand-name22 claims3%
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
- Opioids5%36 of 694 claims
- Antibiotics8%54 of 694 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5292024: 59713%
Drugs named by CMS: 10 in 2024, 12 in 2023.
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. Angela An-Chi 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 individually. Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chang as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Angela An-Chi Chang has 2 publications on record
Dmand AI links 2 papers to Dr. Chang.
Recent publications by Dr. Chang
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 otolaryngologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Angela An-Chi Chang received $3,670 in industry payments from 2016 to 2025
CMS Open Payments shows 116 general payments to Dr. Chang from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 87% of the total. Intersect ENT, Inc. paid the most, $993. It also lists 1 research payment totaling $590 in 2017.
General payments to Dr. Chang by program year, 2016 to 2025
General payments to Dr. Chang by kind, 2016 to 2025
- Food and beverage$3,19587%
- Consulting fees$37510%
- Travel and lodging$1003%
Companies that paid Dr. Chang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Angela An-Chi Chang graduated from David Geffen School of Medicine at UCLA
Dr. Chang graduated from David Geffen School of Medicine at UCLA in 2005.
- Medical school
- Board certified in otolaryngology
Source: Dmand AI Professional Profile Data
Dr. Angela An-Chi Chang accepts plans from 16 insurance carriers
Dr. Chang is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Molina
- +8 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- PPO10
- Medicare9
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Angela An-Chi 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation 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) |
| 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. Angela An-Chi 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. Angela An-Chi Chang's NPI number?
Dr. Angela An-Chi Chang's NPI number is 1730382318. It was assigned on June 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Angela An-Chi Chang?
Dr. Angela An-Chi Chang is an otolaryngologist in La Jolla, California. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Angela An-Chi Chang practice?
Dr. Chang practices at 9834 Genesee Ave, La Jolla, CA 92037. Dr. Chang's primary practice is EGL Ambulatory Surgery Center in La Jolla, California. Dmand AI also links Dr. Chang to 1 hospital, 2 group practices and clinics, 1 physician office and 1 medical group.
What is Dr. Angela An-Chi Chang's office phone number?
The practice phone on file for Dr. Chang is (858) 453-3133.
What is Dr. Angela An-Chi Chang's medical license number?
Dr. Chang holds California license A100380.
Which hospitals is Dr. Angela An-Chi Chang affiliated with?
Dr. Chang is affiliated with Scripps Memorial Hospital La Jolla. Dmand AI links Dr. Chang to 1 more hospital.
What medical group is Dr. Angela An-Chi Chang part of?
Dr. Chang is linked to Emergency and Acute Care Medical Corporation. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Angela An-Chi Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 1,641 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Angela An-Chi Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
What is Dr. Angela An-Chi Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Angela An-Chi Chang see?
CMS counts 493 Medicare patients who saw Dr. Chang in 2024, with an average age of 77.
Is Dr. Angela An-Chi Chang board certified?
Yes. Dr. Chang is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery.
What services does Dr. Angela An-Chi Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were office visit, established patient (99213), surgery: ear (69210) and surgery: lungs and airway (31231).
Where did Dr. Angela An-Chi Chang go to medical school?
Dr. Chang graduated from David Geffen School of Medicine at UCLA in 2005.
What drugs does Dr. Angela An-Chi Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Ipratropium Bromide, Fluticasone Propionate and Azelastine HCl.
Has Dr. Angela An-Chi Chang received payments from drug or device companies?
CMS Open Payments shows $3,670 in general payments to Dr. Chang from 16 companies from 2016 to 2025. The largest total came from Intersect ENT, Inc.
How long has Dr. Angela An-Chi Chang been practicing?
Dr. Chang graduated from medical school in 2005, 21 years ago.
Does Dr. Angela An-Chi Chang do research?
Dmand AI links 2 publications to Dr. Chang.
What insurance does Dr. Angela An-Chi Chang accept?
Dr. Chang is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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