Dr. Heidi Y. Chang, MD
- Medicare services, 2024
- 175
- Medicare patients, 2024
- 135
- Part D claims, 2024
- 142
- Publications
- 4
- MIPS score, 2024
- 95
- Practice address
- 3390 Carmel Mountain Rd, San Diego, CA 92121
- Practice phone
- Call (858) 455-5524
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
South Coast Gynecologic Oncology, Inc
San Diego, 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. Heidi Y. Chang is an OB-GYN in San Diego, California
Dr. Chang practices at South Coast Gynecologic Oncology, Inc in San Diego, California.
Dr. Chang's NPI, 1649681982, was assigned on May 8, 2014. Dr. Chang graduated from UVA School of Medicine in 2012. Dr. Chang's California license number on file is A128445.
- NPI
- 1649681982NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901195262
- NPI enumeration date
- May 8, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (858) 455-5524
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Heidi Y. Chang practices at South Coast Gynecologic Oncology, Inc in San Diego, California
Dr. Chang's primary practice is South Coast Gynecologic Oncology, Inc, at 3390 Carmel Mountain Rd, San Diego, CA 92121 in San Diego County. The practice phone is (858) 455-5524.
- South Coast Gynecologic Oncology, Inc3390 Carmel Mountain Rd, San Diego, CA 92121 · San Diego CountyPhone(858) 455-5524
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Heidi Y. Chang is affiliated with 7 sites of care and 4 medical groups
Dr. Chang's primary practice is South Coast Gynecologic Oncology, Inc in San Diego, California. Dr. Chang is also affiliated with Sharp Memorial Hospital. The medical group on file is South Coast Gynecologic Oncology, Inc. Dmand AI also links Dr. Chang to 3 more hospitals, 3 medical groups and 2 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Heidi Y. 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 |
|---|---|
| South Coast Gynecologic Oncology, Inc | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Heidi Y. Chang is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Chang is board certified in gynecologic oncology by the American Board of Obstetrics and Gynecology. Dr. Chang has a license on file in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists hysterectomy, menopause and ovarian cyst among the conditions Dr. Chang treats.
OB-GYNs near Dr. Chang
Counts of OB-GYNs 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. Heidi Y. Chang billed Medicare for 175 services in 2024
CMS data shows 175 Medicare services from Dr. Chang across 4 procedure codes in 2024, for 135 Medicare patients. Medicare paid $28,466 for them.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1382024: 15714%
- Surgery
- 2023: 452024: 1860%
Where Dr. Chang's Medicare services took place, 2024
- In an office15790%
- In a facility1810%
Dr. Chang compared with the California median for OB-GYNs, 2024
- Dr. Chang
- California median
- Medicare services
- 175vs 583.0 times
- Medicare patients
- 135vs 522.6 times
- Part D claims
- 64vs 3583% above
Medians across 3,823 OB-GYNs 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 OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Heidi Y. Chang treated 135 Medicare patients in 2024, average age 73
CMS counts 135 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 71 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 33% are also on Medicaid. Their average risk score is 1.28, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 62, with 99% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Cancer52%
- Arthritis42%
- Diabetes30%
- Chronic kidney disease27%
- Anxiety25%
- Mood disorders25%
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 62
Patient panel by sex, all payers
- Women99%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Heidi Y. Chang wrote 142 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 142 Medicare Part D claims for 57 patients. 95% of them were for generic drugs. CMS names the drug for 64 of them, across 3 drugs with 11 or more claims each, at $819 in total drug cost. In 2023, CMS named 57 claims across 3 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic135 claims95%
- Brand-name and other7 claims5%
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
- Opioids30%42 of 142 claims
- Antibiotics11%15 of 142 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: 572024: 6412%
Drugs named by CMS: 3 in 2024, 3 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. Heidi Y. Chang scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 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 lists Dr. Chang as offering telehealth. CMS counts 23 procedures of removal of the uterus by Dr. Chang, more than 94% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Chang's MIPS scores, performance year 2024
- 95of 100Final score
- 86.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Chang ranks in Medicare procedure volume
- Removal of the uterus
- 94th percentile23 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Heidi Y. Chang has 4 publications on record
Dmand AI links 4 papers to Dr. Chang, published from 2020 to 2023.
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 OB-GYNs.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Heidi Y. Chang received $2,332 in industry payments from 2016 to 2025
CMS Open Payments shows 68 general payments to Dr. Chang from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $538.
General payments to Dr. Chang by program year, 2016 to 2025
General payments to Dr. Chang by kind, 2016 to 2025
- Food and beverage$2,324100%
- Education$90%
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. Heidi Y. Chang graduated from UVA School of Medicine
Dr. Chang graduated from UVA School of Medicine in 2012.
- Medical school
- Board certified in gynecologic oncology
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Heidi Y. Chang accepts plans from 15 insurance carriers
Dr. Chang is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. Chang accepts, by number of carriers
- Medicare9
- PPO9
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Heidi Y. 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 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. Heidi Y. 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. Heidi Y. Chang's NPI number?
Dr. Heidi Y. Chang's NPI number is 1649681982. It was assigned on May 8, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Heidi Y. Chang?
Dr. Heidi Y. Chang is an OB-GYN in San Diego, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Heidi Y. Chang practice?
Dr. Chang practices at 3390 Carmel Mountain Rd, San Diego, CA 92121. Dr. Chang's primary practice is South Coast Gynecologic Oncology, Inc in San Diego, California. Dmand AI also links Dr. Chang to 3 hospitals, 3 medical groups and 2 group practices and clinics.
What is Dr. Heidi Y. Chang's office phone number?
The practice phone on file for Dr. Chang is (858) 455-5524.
What is Dr. Heidi Y. Chang's medical license number?
Dr. Chang's California license number on file is A128445.
Which hospitals is Dr. Heidi Y. Chang affiliated with?
Dr. Chang is affiliated with Sharp Memorial Hospital. Dmand AI links Dr. Chang to 3 more hospitals.
What medical group is Dr. Heidi Y. Chang part of?
Dr. Chang is linked to South Coast Gynecologic Oncology, Inc. Dmand AI links Dr. Chang to 3 more medical groups.
Does Dr. Heidi Y. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 175 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Heidi Y. Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
What is Dr. Heidi Y. Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 95 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Heidi Y. Chang see?
CMS counts 135 Medicare patients who saw Dr. Chang in 2024, with an average age of 73.
Is Dr. Heidi Y. Chang board certified?
Yes. Dr. Chang is board certified in gynecologic oncology by the American Board of Obstetrics and Gynecology.
What services does Dr. Heidi Y. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and office visit, established patient (99214).
Where did Dr. Heidi Y. Chang go to medical school?
Dr. Chang graduated from UVA School of Medicine in 2012.
What drugs does Dr. Heidi Y. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Oxycodone HCl, Ibuprofen and Megestrol Acetate.
Has Dr. Heidi Y. Chang received payments from drug or device companies?
CMS Open Payments shows $2,332 in general payments to Dr. Chang from 11 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Heidi Y. Chang been practicing?
Dr. Chang graduated from medical school in 2012, 14 years ago.
Does Dr. Heidi Y. Chang do research?
Dmand AI links 4 publications to Dr. Chang, published from 2020 to 2023.
What insurance does Dr. Heidi Y. Chang accept?
Dr. Chang is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
Selling to obstetrics and gynecology practices?
See OB-GYNs in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card