Dr. Cara Hahs, MD
- Medicare services, 2024
- 317
- Medicare patients, 2024
- 245
- Part D claims, 2024
- 133
- Hospital affiliations
- 2
- Industry payments
- $1,014
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hahs' 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. Cara Hahs is a general surgeon in Saint Louis, Missouri
Dr. Hahs practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Dr. Hahs' NPI, 1427031129, was assigned on November 28, 2005. Dr. Hahs graduated from University of South Carolina School of Medicine in 1997. Dr. Hahs holds Missouri license 112784.
- NPI
- 1427031129NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436159548
- NPI enumeration date
- November 28, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cara Hahs practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Dr. Hahs' primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Dr. Cara Hahs is affiliated with 3 sites of care and 1 medical group
Dr. Hahs' primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dr. Hahs is also affiliated with Mercy Hospital South. The medical group on file is Mercy Clinic St. Louis Cancer and Breast Institute, Clayton-Clarkson. Dmand AI also links Dr. Hahs to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cara Hahs' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahs practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | Available with a free account |
| +2 more affiliated sites | 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 Mercy and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Cara Hahs is one of 593 general surgeons in Missouri
Surgery is Dr. Hahs' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Hahs' licenses on file in 2 states: Missouri and Indiana.
Specialties and state licenses
- Surgery, MissouriPrimary
- Indiana license
General surgeons near Dr. Hahs
Counts of general surgeons 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. Cara Hahs billed Medicare for 317 services in 2024
CMS data shows 317 Medicare services from Dr. Hahs across 7 procedure codes in 2024, for 245 Medicare patients. Medicare paid $29,028 for them.
Dr. Hahs' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3192024: 24523%
- Surgery
- 2023: 942024: 7223%
Where Dr. Hahs' Medicare services took place, 2024
- In an office29392%
- In a facility248%
Dr. Hahs compared with the Missouri median for general surgeons, 2024
- Dr. Hahs
- Missouri median
- Medicare services
- 317vs 16988% above
- Medicare patients
- 245vs 12793% above
- Part D claims
- 103vs 412.5 times
Medians across 570 general surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Hahs' 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. Hahs and other general surgeons in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cara Hahs treated 245 Medicare patients in 2024, average age 73
CMS counts 245 Medicare patients who saw Dr. Hahs in 2024. The largest group is 65 to 74, with 139 patients. 75% of them have cancer, and 75% have high cholesterol. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hahs' median patient age at 62, with 97% women.
Dr. Hahs' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Hahs' Medicare patients, 2024
- Cancer75%
- High cholesterol75%
- High blood pressure70%
- Arthritis56%
- Anxiety26%
- Mood disorders25%
- Osteoporosis24%
- Chronic kidney disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hahs' 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
- Women97%
- Men2%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cara Hahs wrote 133 Medicare Part D claims in 2024
In 2024, Dr. Hahs wrote 133 Medicare Part D claims for 90 patients. 99% of them were for generic drugs. CMS names the drug for 103 of them, across 2 drugs with 11 or more claims each, at $445 in total drug cost. In 2023, CMS named 86 claims across 2 drugs.
Dr. Hahs' Part D claims by kind of drug, 2024
- Generic132 claims99%
- Brand-name and other1 claims1%
Dr. Hahs' 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. Hahs' Part D claims, 2024
- Opioids71%94 of 133 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: 862024: 10320%
Drugs named by CMS: 2 in 2024, 2 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. Cara Hahs ranks in the 93rd percentile for mastectomy in Medicare
Dr. Hahs accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 45 procedures of mastectomy by Dr. Hahs, more than 93% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Hahs ranks in Medicare procedure volume
- Mastectomy
- 93rd percentile45 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Cara Hahs received $1,014 in industry payments from 2016 to 2025
CMS Open Payments shows 35 general payments to Dr. Hahs from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $193.
General payments to Dr. Hahs by program year, 2016 to 2025
Companies that paid Dr. Hahs 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. Cara Hahs graduated from University of South Carolina School of Medicine
Dr. Hahs graduated from University of South Carolina School of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cara Hahs'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)Doctors and Clinicians Utilization Data (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 Dr. Cara Hahs
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. Cara Hahs' NPI number?
Dr. Cara Hahs' NPI number is 1427031129. It was assigned on November 28, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Cara Hahs?
Dr. Cara Hahs is a general surgeon in Saint Louis, Missouri. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Cara Hahs practice?
Dr. Hahs practices at 615 New Ballas Road, Saint Louis, MO 63141. Dr. Hahs' primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dmand AI also links Dr. Hahs to 1 group practice or clinic.
What is Dr. Cara Hahs' office phone number?
The practice phone on file for Dr. Hahs is (314) 251-6000.
What is Dr. Cara Hahs' medical license number?
Dr. Hahs holds Missouri license 112784, one of the licenses on file in 2 states.
Which states has Dr. Cara Hahs been licensed in?
Dmand AI has state licenses on file for Dr. Hahs in Missouri and Indiana.
Which hospitals is Dr. Cara Hahs affiliated with?
Dr. Hahs practices at Mercy Hospital St. Louis in Saint Louis, Missouri. Dr. Hahs is also affiliated with Mercy Hospital South.
What medical group is Dr. Cara Hahs part of?
Dr. Hahs is linked to Mercy Clinic St. Louis Cancer and Breast Institute, Clayton-Clarkson.
Does Dr. Cara Hahs accept Medicare?
Yes. CMS data shows Dr. Hahs billed Medicare for 317 services in 2024, and Dr. Hahs accepts Medicare assignment.
How many Medicare patients does Dr. Cara Hahs see?
CMS counts 245 Medicare patients who saw Dr. Hahs in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Cara Hahs bill to Medicare?
In 2024, Dr. Hahs' most billed Medicare services were office visit, established patient (99213), office visit, new patient (99205) and surgery: blood and lymph system (38900).
Where did Dr. Cara Hahs go to medical school?
Dr. Hahs graduated from University of South Carolina School of Medicine in 1997.
What drugs does Dr. Cara Hahs prescribe most?
In 2024 Medicare Part D data, Dr. Hahs' most prescribed drugs by claims were Hydrocodone-Acetaminophen and Lidocaine-Prilocaine.
Has Dr. Cara Hahs received payments from drug or device companies?
CMS Open Payments shows $1,014 in general payments to Dr. Hahs from 20 companies from 2016 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Cara Hahs been practicing?
Dr. Hahs graduated from medical school in 1997, 29 years ago.
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