Dr. Peter Fonseca, MD
- Medicare services, 2024
- 415
- Medicare patients, 2024
- 125
- Part D claims, 2024
- 233
- Publications
- 1
- Hospital affiliations
- 4
- Practice address
- 400 1 Capitol Dr, Saint Charles, MO 63301
- Practice phone
- Call (636) 496-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SSM Health Medical Group
Saint Charles, Missouri
Find Dr. Fonseca'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 Fonseca is a cardiothoracic surgeon in Saint Charles, Missouri
Dr. Fonseca practices at SSM Health Medical Group in Saint Charles, Missouri.
Dr. Fonseca's NPI, 1760483101, was assigned on August 9, 2005. Dr. Fonseca graduated from Saint Louis University School Of Medicine in 1987. Dr. Fonseca holds Missouri license 116658.
- NPI
- 1760483101NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638217425
- NPI enumeration date
- August 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 496-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter Fonseca practices at SSM Health Medical Group in Saint Charles, Missouri
Dr. Fonseca's primary practice is SSM Health Medical Group, at 400 1 Capitol Dr, Saint Charles, MO 63301 in Saint Charles County. The practice phone is (636) 496-5000.
- SSM Health Medical Group400 1 Capitol Dr, Saint Charles, MO 63301 · Saint Charles CountyPhone(636) 496-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Peter Fonseca is affiliated with 6 sites of care and 1 medical group
Dr. Fonseca's primary practice is SSM Health Medical Group in Saint Charles, Missouri. Dr. Fonseca is also affiliated with SSM Health St. Joseph Hospital - St. Charles. The medical group on file is SSM Health Medical Group. Dmand AI also links Dr. Fonseca to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter Fonseca's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fonseca practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health Medical Group | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Peter Fonseca is one of 112 cardiothoracic surgeons in Missouri
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Fonseca's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Fonseca is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Fonseca's licenses on file in 3 states: Missouri, Ohio and Wisconsin.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), MissouriPrimary
- Ohio license
- Wisconsin license
Clinical focus
Dmand AI lists lung resection among the conditions Dr. Fonseca treats.
Cardiothoracic surgeons near Dr. Fonseca
Counts of cardiothoracic 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. Peter Fonseca billed Medicare for 415 services in 2024
CMS data shows 415 Medicare services from Dr. Fonseca across 8 procedure codes in 2024, for 125 Medicare patients. Medicare paid $29,134 for them.
Dr. Fonseca's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2822024: 35727%
- Surgery
- 2023: 422024: 5838%
Where Dr. Fonseca's Medicare services took place, 2024
- In an office225%
- In a facility39395%
Dr. Fonseca compared with the Missouri median for cardiothoracic surgeons, 2024
- Dr. Fonseca
- Missouri median
- Medicare services
- 415vs 1073.9 times
- Medicare patients
- 125vs 10025% above
- Part D claims
- 117vs 323.7 times
Medians across 106 cardiothoracic surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Fonseca'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. Fonseca?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fonseca and other cardiothoracic surgeons in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter Fonseca treated 125 Medicare patients in 2024, average age 73
CMS counts 125 Medicare patients who saw Dr. Fonseca in 2024. The largest group is 65 to 74, with 58 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.23, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Fonseca's median patient age at 71, with 53% women.
Dr. Fonseca's Medicare patients by age, 2024
Dr. Fonseca's Medicare patients by sex, 2024
- Women5947%
- Men6653%
Chronic conditions among Dr. Fonseca's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- COPD62%
- Cancer57%
- Ischemic heart disease45%
- Arthritis40%
- Diabetes38%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fonseca's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter Fonseca wrote 233 Medicare Part D claims in 2024
In 2024, Dr. Fonseca wrote 233 Medicare Part D claims for 87 patients. 94% of them were for generic drugs. CMS names the drug for 117 of them, across 3 drugs with 11 or more claims each, at $1,051 in total drug cost. In 2023, CMS named 105 claims across 2 drugs.
Dr. Fonseca's Part D claims by kind of drug, 2024
- Generic219 claims94%
- Brand-name14 claims6%
Dr. Fonseca'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. Fonseca's Part D claims, 2024
- Opioids41%95 of 233 claims
- Antibiotics5%12 of 233 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: 1052024: 11711%
Drugs named by CMS: 3 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
How Dr. Peter Fonseca takes part in Medicare
Dr. Fonseca 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 Fonseca has 1 publication on record
Dmand AI links 1 paper to Dr. Fonseca.
Recent publications by Dr. Fonseca
See who Dr. Fonseca researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fonseca works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Peter Fonseca received $9,968 in industry payments from 2016 to 2025
CMS Open Payments shows 83 general payments to Dr. Fonseca from 17 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 37% of the total. Intuitive Surgical, Inc. paid the most, $8,087.
General payments to Dr. Fonseca by program year, 2016 to 2025
General payments to Dr. Fonseca by kind, 2016 to 2025
- Food and beverage$3,66537%
- Travel and lodging$3,53936%
- Education$2,75028%
- Gifts$140%
Companies that paid Dr. Fonseca 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. Peter Fonseca has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Fonseca, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Fonseca
- 2013
- CMS Stage 1 EHR
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Peter Fonseca graduated from Saint Louis University School Of Medicine
Dr. Fonseca graduated from Saint Louis University School Of Medicine in 1987. Dr. Fonseca is a member of ACS and STS.
- Medical school
- Board certified in surgery
- Board certified in thoracic and cardiac surgery
Source: Dmand AI Professional Profile Data
Dr. Peter Fonseca accepts plans from 19 insurance carriers
Dr. Fonseca is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- Elevance
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +11 more carriersWith a free account
Plan types Dr. Fonseca accepts, by number of carriers
- PPO13
- Medicare10
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Peter Fonseca'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 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Peter Fonseca
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 Fonseca's NPI number?
Dr. Peter Fonseca's NPI number is 1760483101. It was assigned on August 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter Fonseca?
Dr. Peter Fonseca is a cardiothoracic surgeon in Saint Charles, Missouri. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Peter Fonseca practice?
Dr. Fonseca practices at 400 1 Capitol Dr, Saint Charles, MO 63301. Dr. Fonseca's primary practice is SSM Health Medical Group in Saint Charles, Missouri. Dmand AI also links Dr. Fonseca to 3 hospitals and 1 group practice or clinic.
What is Dr. Peter Fonseca's office phone number?
The practice phone on file for Dr. Fonseca is (636) 496-5000.
What is Dr. Peter Fonseca's medical license number?
Dr. Fonseca holds Missouri license 116658, one of the licenses on file in 3 states.
Which states has Dr. Peter Fonseca been licensed in?
Dmand AI has state licenses on file for Dr. Fonseca in Missouri (1998 to 2026), Ohio (1988 to 2027) and Wisconsin (1992 to 2017).
Which hospitals is Dr. Peter Fonseca affiliated with?
Dr. Fonseca is affiliated with SSM Health St. Joseph Hospital - St. Charles. Dmand AI links Dr. Fonseca to 3 more hospitals.
What medical group is Dr. Peter Fonseca part of?
Dr. Fonseca is linked to SSM Health Medical Group.
Does Dr. Peter Fonseca accept Medicare?
Yes. CMS data shows Dr. Fonseca billed Medicare for 415 services in 2024, and Dr. Fonseca accepts Medicare assignment.
How many Medicare patients does Dr. Peter Fonseca see?
CMS counts 125 Medicare patients who saw Dr. Fonseca in 2024, with an average age of 73.
Show 8 more questionsShow fewer questions
Is Dr. Peter Fonseca board certified?
Yes. Dr. Fonseca is board certified in surgery by the American Board of Surgery.
What services does Dr. Peter Fonseca bill to Medicare?
In 2024, Dr. Fonseca's most billed Medicare services were hospital inpatient care (99231), office visit, established patient (99214) and hospital inpatient care (99232).
Where did Dr. Peter Fonseca go to medical school?
Dr. Fonseca graduated from Saint Louis University School Of Medicine in 1987.
What drugs does Dr. Peter Fonseca prescribe most?
In 2024 Medicare Part D data, Dr. Fonseca's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Gabapentin and Metoclopramide HCl.
Has Dr. Peter Fonseca received payments from drug or device companies?
CMS Open Payments shows $9,968 in general payments to Dr. Fonseca from 17 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Peter Fonseca been practicing?
Dr. Fonseca graduated from medical school in 1987, 39 years ago.
Does Dr. Peter Fonseca do research?
Dmand AI links 1 publication to Dr. Fonseca.
What insurance does Dr. Peter Fonseca accept?
Dr. Fonseca is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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