Expert Rev Gastroenterol Hepatol
Evidence-Based MedicinePredictive Value of TestsSphincter of Oddi
Dr. John P. Affronti, MD
NPI1023020872PAC ID7214024181
- Medicare services, 2024
- 240
- Medicare patients, 2024
- 207
- Part D claims, 2017
- 11
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 600 N Wolfe St, Baltimore, MD 21287
- Practice phone
- Call (855) 662-3017
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Hospital Nelson/Harvey Building
Baltimore, Maryland
Find Dr. Affronti's professional email, personal email and mobile number
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Dr. John P. Affronti is a gastroenterologist in Baltimore, Maryland
Dr. Affronti practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
Dr. Affronti's NPI, 1023020872, was assigned on August 12, 2006. Dr. Affronti graduated from George Washington University School of Medicine in 1985. Dr. Affronti holds Maryland license D0091561.
NPI and contact details
- NPI
- 1023020872NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214024181
- NPI enumeration date
- August 12, 2006
- NPI status
- Active
- Practice phone
- (855) 662-3017
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John P. Affronti practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland
Dr. Affronti's primary practice is Johns Hopkins Hospital Nelson/Harvey Building, at 600 N Wolfe St, Baltimore, MD 21287 in Baltimore City. The practice phone is (855) 662-3017.
- Johns Hopkins Hospital Nelson/Harvey Building600 N Wolfe St, Baltimore, MD 21287 · Baltimore CityPhone(855) 662-3017
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John P. Affronti is affiliated with 5 sites of care and 3 medical groups
Dr. Affronti's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dr. Affronti is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Affronti to 2 more hospitals, 2 medical groups and 1 group practice or clinic, each named with a free account.
Johns Hopkins Hospital Nelson/Harvey BuildingPrimary
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. John P. Affronti's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Affronti practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Hospital Nelson/Harvey Building | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John P. Affronti is one of 405 gastroenterologists in Maryland
Gastroenterology is Dr. Affronti's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Affronti's licenses on file in 2 states: Maryland and Illinois.
Specialties and state licenses
- Gastroenterology, MarylandPrimary
- Illinois license
Gastroenterologists near Dr. Affronti
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
Dr. John P. Affronti billed Medicare for 240 services in 2024
CMS data shows 240 Medicare services from Dr. Affronti across 8 procedure codes in 2024, for 207 Medicare patients. Medicare paid $23,609 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024240
Medicare patients207
Paid by Medicare$23,609
Procedure codes8
Dr. Affronti's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1752024: 13821%
- Office and hospital visits
- 2023: 792024: 8811%
- Other services
- 2023: 02024: 14
Dr. Affronti compared with the Maryland median for gastroenterologists, 2024
- Dr. Affronti
- Maryland median
- Medicare services
- 240vs 66864% below
- Medicare patients
- 207vs 39047% below
- Part D claims
- 11vs 39297% below
Medians across 396 gastroenterologists in Maryland with Dmand AI profiles that report each measure.
Dr. Affronti'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. Affronti?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Affronti and other gastroenterologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John P. Affronti treated 207 Medicare patients in 2024, average age 69
CMS counts 207 Medicare patients who saw Dr. Affronti in 2024. The largest group is 65 to 74, with 97 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 31% are also on Medicaid. Their average risk score is 2.97, 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. Affronti's median patient age at 66, with 55% women.
Medicare patients, 2024207
Average age69
Average risk score2.97
Also on Medicaid31%
Dr. Affronti's Medicare patients by age, 2024
Dr. Affronti's Medicare patients by sex, 2024
- Women9546%
- Men11254%
Chronic conditions among Dr. Affronti's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Chronic kidney disease49%
- Diabetes49%
- Ischemic heart disease47%
- Mood disorders42%
- Depression39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Affronti's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John P. Affronti wrote 11 Medicare Part D claims in 2017
In 2017, Dr. Affronti wrote 11 Medicare Part D claims. They cover 1 drug, with $1,051 in total drug cost. In 2016, CMS named 12 claims across 1 drug.
Part D claims, 201711
Drugs named by CMS1
Total drug cost$1,051
Dr. Affronti's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 122017: 118%
Drugs named by CMS: 1 in 2017, 1 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. John P. Affronti ranks in the 58th percentile for colonoscopy in Medicare
CMS counts 39 procedures of colonoscopy by Dr. Affronti, more than 58% of the clinicians it reports for that procedure.
Where Dr. Affronti ranks in Medicare procedure volume
- Colonoscopy
- 58th percentile39 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 58th percentile35 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Source: Doctors and Clinicians Utilization Data (CMS)
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Dr. John P. Affronti has 1 publication on record
Dmand AI links 1 paper to Dr. Affronti.
Papers1
Recent publications by Dr. Affronti
See who Dr. Affronti researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Affronti works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John P. Affronti received $1,032 in industry payments from 2016 to 2021
CMS Open Payments shows 51 general payments to Dr. Affronti from 12 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 90% of the total. Abbvie Inc. paid the most, $568.
General payments to Dr. Affronti by program year, 2016 to 2021
General payments to Dr. Affronti by kind, 2016 to 2021
$1Kin total
- Food and beverage$92590%
- Education$10710%
Companies that paid Dr. Affronti the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John P. Affronti graduated from George Washington University School of Medicine
Dr. Affronti graduated from George Washington University School of Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John P. Affronti'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | 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 |
| 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. John P. Affronti
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. John P. Affronti's NPI number?
Dr. John P. Affronti's NPI number is 1023020872. It was assigned on August 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John P. Affronti?
Dr. John P. Affronti is a gastroenterologist in Baltimore, Maryland. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John P. Affronti practice?
Dr. Affronti practices at 600 N Wolfe St, Baltimore, MD 21287. Dr. Affronti's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dmand AI also links Dr. Affronti to 2 hospitals, 2 medical groups and 1 group practice or clinic.
What is Dr. John P. Affronti's office phone number?
The practice phone on file for Dr. Affronti is (855) 662-3017.
What is Dr. John P. Affronti's medical license number?
Dr. Affronti holds Maryland license D0091561, one of the licenses on file in 2 states.
Which states has Dr. John P. Affronti been licensed in?
Dmand AI has state licenses on file for Dr. Affronti in Maryland and Illinois.
Which hospitals is Dr. John P. Affronti affiliated with?
Dr. Affronti is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Affronti to 2 more hospitals.
What medical group is Dr. John P. Affronti part of?
Dr. Affronti is linked to Johns Hopkins University. Dmand AI links Dr. Affronti to 2 more medical groups.
Does Dr. John P. Affronti accept Medicare?
Yes. CMS data shows Dr. Affronti billed Medicare for 240 services in 2024.
How many Medicare patients does Dr. John P. Affronti see?
CMS counts 207 Medicare patients who saw Dr. Affronti in 2024, with an average age of 69.
Show 6 more questionsShow fewer questions
What services does Dr. John P. Affronti bill to Medicare?
In 2024, Dr. Affronti's most billed Medicare services were hospital inpatient care (99232), surgery: digestive system (43239) and hospital inpatient care (99221).
Where did Dr. John P. Affronti go to medical school?
Dr. Affronti graduated from George Washington University School of Medicine in 1985.
What drugs does Dr. John P. Affronti prescribe most?
In 2017 Medicare Part D data, Dr. Affronti's most prescribed drugs by claims were Suprep.
Has Dr. John P. Affronti received payments from drug or device companies?
CMS Open Payments shows $1,032 in general payments to Dr. Affronti from 12 companies from 2016 to 2021. The largest total came from Abbvie Inc.
How long has Dr. John P. Affronti been practicing?
Dr. Affronti graduated from medical school in 1985, 41 years ago.
Does Dr. John P. Affronti do research?
Dmand AI links 1 publication to Dr. Affronti.
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