Dr. Peter S. Chang, MD
- Medicare services, 2024
- 209
- Medicare patients, 2024
- 157
- Part D claims, 2024
- 1,600
- Publications
- 35
- Hospital affiliations
- 2
- Practice address
- 181 Emmett St W, Battle Creek, MI 49037
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Grace Health - HOPD
Acute Care Hospital outpatient department · Battle Creek, Michigan
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. Peter S. Chang is a family medicine physician in Battle Creek, Michigan
Dr. Chang practices at Grace Health - HOPD in Battle Creek, Michigan.
Dr. Chang's NPI, 1205814811, was assigned on January 4, 2006. Dr. Chang graduated from University of Kansas School of Med (KC/Wich/Sal) in 1991. Dr. Chang holds Michigan license 4301063155.
- NPI
- 1205814811NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830116318
- NPI enumeration date
- January 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter S. Chang practices at Grace Health - HOPD in Battle Creek, Michigan
Dr. Chang's primary practice is Grace Health - HOPD, at 181 Emmett St W, Battle Creek, MI 49037.
- Grace Health - HOPD181 Emmett St W, Battle Creek, MI 49037
Source: Dmand AI Affiliation Data
Dr. Peter S. Chang is affiliated with 5 sites of care and 1 medical group
Dr. Chang's primary practice is Grace Health - HOPD in Battle Creek, Michigan. Dr. Chang is also affiliated with Bronson Battle Creek Hospital. The medical group on file is Grace Health. Dmand AI also links Dr. Chang to 1 more hospital and 2 community health centers, each named with a free account. Dr. Chang's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Peter S. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Grace Health - HOPD | 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. Peter S. Chang is one of 4,931 family medicine physicians in Michigan
Family medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chang is licensed in Michigan.
Specialties and state licenses
- Family medicine, MichiganPrimary
Family medicine physicians near Dr. Chang
Counts of family medicine physicians 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. Peter S. Chang billed Medicare for 209 services in 2024
CMS data shows 209 Medicare services from Dr. Chang across 5 procedure codes in 2024, for 157 Medicare patients. Medicare paid $2,207 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Lab and pathology
- 2022: 282024: 193589%
- Tests and treatments
- 2022: 02024: 16
Dr. Chang compared with the Michigan median for family medicine physicians, 2024
- Dr. Chang
- Michigan median
- Medicare services
- 209vs 24816% below
- Medicare patients
- 157vs 11240% above
- Part D claims
- 1,167vs 1,03313% above
Medians across 4,990 family medicine physicians in Michigan 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 family medicine physicians in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter S. Chang treated 157 Medicare patients in 2024, average age 64
CMS counts 157 Medicare patients who saw Dr. Chang in 2024. The largest group is under 65, with 65 patients. 72% of them have high blood pressure, and 58% have diabetes. 50% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 46, with 61% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chang's Medicare patients by sex, 2024
- Women10869%
- Men4931%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure72%
- Diabetes58%
- High cholesterol48%
- Mood disorders41%
- Arthritis38%
- Anxiety33%
- Depression33%
- Tobacco use32%
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 46
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter S. Chang wrote 1,600 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 1,600 Medicare Part D claims for 169 patients. 79% of them were for generic drugs. CMS names the drug for 1,167 of them, across 44 drugs with 11 or more claims each, at $97,989 in total drug cost. In 2023, CMS named 1,617 claims across 58 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic1,266 claims79%
- Brand-name299 claims19%
- Other35 claims2%
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
- Opioids8%132 of 1,600 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: 1,6172024: 1,16728%
Drugs named by CMS: 44 in 2024, 58 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
How Dr. Peter S. Chang takes part in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Peter S. Chang has 35 publications on record
Dmand AI links 35 papers to Dr. Chang, published from 2017 to 2025. 2020 was the busiest year, with 5. The most frequent topics are Arthroscopy, Rotator Cuff Injuries and Shoulder Joint. Dr. Chang has published most often in J Shoulder Elbow Surg. Dr. Chang's most frequent co-authors are Keith M. Baumgarten, MD, Peter James Millett, MD and Robert Henry Brophy, MD.
Dr. Chang's papers by year, 2017 to 2025
Topics Dr. Chang writes about most
- Arthroscopy
- Rotator Cuff Injuries
- Shoulder Joint
- Arthroplasty, Replacement, Knee
- Athletes
- Football
- Hamstring Tendons
- Ontario
Dr. Chang's most frequent co-authors
- Keith M. Baumgarten, MD8 shared papers
- Peter James Millett, MD4 shared papers
- Robert Henry Brophy, MD3 shared papers
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 family medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Peter S. Chang received $108 in industry payments from 2017 to 2025
CMS Open Payments shows 5 general payments to Dr. Chang from 3 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $68.
General payments to Dr. Chang by program year, 2017 to 2025
Companies that paid Dr. Chang the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter S. Chang graduated from University of Kansas School of Med (KC/Wich/Sal)
Dr. Chang graduated from University of Kansas School of Med (KC/Wich/Sal) in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Peter S. 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) |
| 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 |
| 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. Peter S. 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. Peter S. Chang's NPI number?
Dr. Peter S. Chang's NPI number is 1205814811. It was assigned on January 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter S. Chang?
Dr. Peter S. Chang is a family medicine physician in Battle Creek, Michigan. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Peter S. Chang practice?
Dr. Chang practices at 181 Emmett St W, Battle Creek, MI 49037. Dr. Chang's primary practice is Grace Health - HOPD in Battle Creek, Michigan. Dmand AI also links Dr. Chang to 1 hospital and 2 community health centers.
What is Dr. Peter S. Chang's medical license number?
Dr. Chang holds Michigan license 4301063155.
Which hospitals is Dr. Peter S. Chang affiliated with?
Dr. Chang is affiliated with Bronson Battle Creek Hospital. Dmand AI links Dr. Chang to 1 more hospital.
What medical group is Dr. Peter S. Chang part of?
Dr. Chang is linked to Grace Health.
Does Dr. Peter S. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 209 services in 2024, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. Peter S. Chang see?
CMS counts 157 Medicare patients who saw Dr. Chang in 2024, with an average age of 64.
What services does Dr. Peter S. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were lab and pathology test (83036), lab and pathology test (81002) and heart test or procedure (93005).
Where did Dr. Peter S. Chang go to medical school?
Dr. Chang graduated from University of Kansas School of Med (KC/Wich/Sal) in 1991.
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What drugs does Dr. Peter S. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Metoprolol Succinate.
Has Dr. Peter S. Chang received payments from drug or device companies?
CMS Open Payments shows $108 in general payments to Dr. Chang from 3 companies from 2017 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Peter S. Chang been practicing?
Dr. Chang graduated from medical school in 1991, 35 years ago.
Does Dr. Peter S. Chang do research?
Dmand AI links 35 publications to Dr. Chang, published from 2017 to 2025.
Who does Dr. Peter S. Chang publish with?
Dr. Chang's most frequent co-authors are Keith M. Baumgarten, MD (8 shared papers), Peter James Millett, MD (4 shared papers) and Robert Henry Brophy, MD (3 shared papers).
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