Chelsea Hartzell
- Medicare services, 2024
- 312
- Medicare patients, 2024
- 283
- Part D claims, 2024
- 1,752
- MIPS score, 2024
- 84
- Hospital affiliations
- 1
- Practice address
- 1045 West Stephenson Street, Freeport, IL 61032
- Practice phone
- Call (815) 599-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Chelsea Hartzell's professional email, personal email and mobile number
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Chelsea Hartzell is a gastroenterologist in Freeport, Illinois
Chelsea Hartzell practices at Mercyhealth Hospital-Freeport in Freeport, Illinois, part of Mercyhealth.
Chelsea Hartzell's NPI, 1003450354, was assigned on October 30, 2019. Chelsea Hartzell graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2021. Chelsea Hartzell holds Illinois license 209023887.
- NPI
- 1003450354NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678962578
- NPI enumeration date
- October 30, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 599-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Chelsea Hartzell practices at Mercyhealth Hospital-Freeport in Freeport, Illinois
Chelsea Hartzell's primary practice is Mercyhealth Hospital-Freeport, at 1045 West Stephenson Street, Freeport, IL 61032 in Stephenson County. The practice phone is (815) 599-6000.
- Mercyhealth Hospital-Freeport1045 West Stephenson Street, Freeport, IL 61032 · Stephenson CountyPhone(815) 599-6000
Source: Dmand AI Affiliation Data
Chelsea Hartzell is affiliated with 1 site of care and 1 medical group
Chelsea Hartzell's primary practice is Mercyhealth Hospital-Freeport in Freeport, Illinois, part of Mercyhealth. The medical group on file is FHN.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Chelsea Hartzell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Chelsea Hartzell practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercyhealth Hospital-Freeport | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Mercyhealth and 6.2K+ hospitals, with verified contacts in the same login.
Chelsea Hartzell is one of 771 gastroenterologists in Illinois
Gastroenterology is Chelsea Hartzell's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Chelsea Hartzell is licensed in Illinois.
Specialties and state licenses
- Gastroenterology, IllinoisPrimary
Gastroenterologists near Chelsea Hartzell
Counts of gastroenterologists 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
Chelsea Hartzell billed Medicare for 312 services in 2024
CMS data shows 312 Medicare services from Chelsea Hartzell across 4 procedure codes in 2024, all of them office visits, for 283 Medicare patients. Medicare paid $19,165 for them. Every service was in an office.
Chelsea Hartzell's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3102024: 3121%
Chelsea Hartzell compared with the Illinois median for gastroenterologists, 2024
- Chelsea Hartzell
- Illinois median
- Medicare services
- 312vs 49837% below
- Medicare patients
- 283vs 3078% below
- Part D claims
- 1,669vs 3704.5 times
Medians across 757 gastroenterologists in Illinois with Dmand AI profiles that report each measure.
Chelsea Hartzell'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 Chelsea Hartzell?
Medicare shows one payer. Book a meeting to get commercial claims data for Chelsea Hartzell and other gastroenterologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Chelsea Hartzell treated 283 Medicare patients in 2024, average age 74
CMS counts 283 Medicare patients who saw Chelsea Hartzell in 2024. The largest group is 65 to 74, with 109 patients. 69% of them have high blood pressure, and 62% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Chelsea Hartzell's median patient age at 69, with 53% women.
Chelsea Hartzell's Medicare patients by age, 2024
Chelsea Hartzell's Medicare patients by sex, 2024
- Women16358%
- Men12042%
Chronic conditions among Chelsea Hartzell's Medicare patients, 2024
- High blood pressure69%
- High cholesterol62%
- Arthritis40%
- Ischemic heart disease28%
- Diabetes27%
- Anxiety25%
- COPD24%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Chelsea Hartzell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Chelsea Hartzell wrote 1,752 Medicare Part D claims in 2024
In 2024, Chelsea Hartzell wrote 1,752 Medicare Part D claims for 520 patients. 88% of them were for generic drugs. CMS names the drug for 1,669 of them, across 22 drugs with 11 or more claims each, at $237,132 in total drug cost. In 2023, CMS named 1,821 claims across 26 drugs.
Chelsea Hartzell's Part D claims by kind of drug, 2024
- Generic1,536 claims88%
- Brand-name216 claims12%
Chelsea Hartzell'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 Chelsea Hartzell's Part D claims, 2024
- Antibiotics1%13 of 1,752 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: 1,8212024: 1,6698%
Drugs named by CMS: 22 in 2024, 26 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
Chelsea Hartzell scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Chelsea Hartzell for performance year 2024, reported as part of a group. Chelsea Hartzell accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Chelsea Hartzell's MIPS scores, performance year 2024
- 84of 100Final score
- 75.2of 100Quality
- 92of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
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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Chelsea Hartzell received $1,004 in industry payments from 2022 to 2025
CMS Open Payments shows 62 general payments to Chelsea Hartzell from 13 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $415.
General payments to Chelsea Hartzell by program year, 2022 to 2025
Companies that paid Chelsea Hartzell the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Chelsea Hartzell graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Chelsea Hartzell graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Chelsea Hartzell'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 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) |
| 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 Chelsea Hartzell
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Chelsea Hartzell's NPI number?
Chelsea Hartzell's NPI number is 1003450354. It was assigned on October 30, 2019, and it is active in the NPI Registry.
What does Chelsea Hartzell specialize in?
Chelsea Hartzell is a gastroenterologist in Freeport, Illinois. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Chelsea Hartzell practice?
Chelsea Hartzell practices at 1045 West Stephenson Street, Freeport, IL 61032. Chelsea Hartzell's primary practice is Mercyhealth Hospital-Freeport in Freeport, Illinois, part of Mercyhealth.
What is Chelsea Hartzell's office phone number?
The practice phone on file for Chelsea Hartzell is (815) 599-6000.
What is Chelsea Hartzell's medical license number?
Chelsea Hartzell holds Illinois license 209023887.
Which hospitals is Chelsea Hartzell affiliated with?
Chelsea Hartzell practices at Mercyhealth Hospital-Freeport in Freeport, Illinois.
What medical group is Chelsea Hartzell part of?
Chelsea Hartzell is linked to FHN.
Does Chelsea Hartzell accept Medicare?
Yes. CMS data shows Chelsea Hartzell billed Medicare for 312 services in 2024, and Chelsea Hartzell accepts Medicare assignment.
What is Chelsea Hartzell's MIPS score?
Chelsea Hartzell's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Chelsea Hartzell see?
CMS counts 283 Medicare patients who saw Chelsea Hartzell in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Chelsea Hartzell bill to Medicare?
In 2024, Chelsea Hartzell's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, new patient (99203).
Where did Chelsea Hartzell go to medical school?
Chelsea Hartzell graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2021.
What drugs does Chelsea Hartzell prescribe most?
In 2024 Medicare Part D data, Chelsea Hartzell's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Famotidine.
Has Chelsea Hartzell received payments from drug or device companies?
CMS Open Payments shows $1,004 in general payments to Chelsea Hartzell from 13 companies from 2022 to 2025. The largest total came from Abbvie Inc.
How long has Chelsea Hartzell been practicing?
Chelsea Hartzell graduated from medical school in 2021, 5 years ago.
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