Adam Donald Farmer, MBBS, PhD

  • Saint Louis, MO
  • Gastroenterologist
NPI1942050463PAC ID8527406974
Medicare services, 2024
97
Medicare patients, 2024
107
Part D claims, 2024
105
Publications
135
Clinical trials
1
Practice address
1201 S Grand Blvd, Saint Louis, MO 63104
Practice phone
Call (314) 257-8000
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

SSM Health Saint Louis University Hospital

Hospital · Saint Louis, Missouri

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Adam Donald Farmer is a gastroenterologist in Saint Louis, Missouri

Adam Farmer practices at SSM Health Saint Louis University Hospital in Saint Louis, Missouri, part of SSM Health Care.

Adam Farmer's NPI, 1942050463, was assigned on March 26, 2024. Adam Farmer holds Missouri license 2023045808.

NPI and contact details
Medicare PAC ID
8527406974
NPI enumeration date
March 26, 2024
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(314) 257-8000
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
51
Medical school graduation
2001

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Adam Donald Farmer practices at SSM Health Saint Louis University Hospital in Saint Louis, Missouri

Adam Farmer's primary practice is SSM Health Saint Louis University Hospital, at 1201 S Grand Blvd, Saint Louis, MO 63104 in St. Louis City. The practice phone is (314) 257-8000.

Source: Dmand AI Affiliation Data

Adam Donald Farmer is affiliated with 3 sites of care and 1 medical group

Adam Farmer's primary practice is SSM Health Saint Louis University Hospital in Saint Louis, Missouri, part of SSM Health Care. Adam Farmer is also affiliated with Memorial Hospital in Belleville. The medical group on file is SLUCare Physician Group. Dmand AI also links Adam Farmer to 1 more behavioral health center, named with a free account.

See all 4 affiliations for Adam Farmer

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Adam Donald Farmer's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Adam Farmer practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
SSM Health Saint Louis University HospitalAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Adam Donald Farmer is one of 329 gastroenterologists in Missouri

Gastroenterology is Adam Farmer's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Adam Farmer is licensed in Missouri.

Specialties and state licenses

  • Gastroenterology, MissouriPrimaryLicense 2023045808 · taxonomy 207RG0100X

Gastroenterologists near Adam Farmer

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

Adam Donald Farmer billed Medicare for 97 services in 2024

CMS data shows 97 Medicare services from Adam Farmer across 6 procedure codes in 2024, for 107 Medicare patients. Medicare paid $6,864 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202497
Medicare patients107
Paid by Medicare$6,864
Procedure codes6

Adam Farmer's Medicare services by type, 2024

  1. Office and hospital visits72
  2. Tests and treatments25

Adam Farmer compared with the Missouri median for gastroenterologists, 2024

  • Adam Farmer
  • Missouri median
Medicare services
97vs 41677% below
Medicare patients
107vs 29664% below
Part D claims
59vs 43486% below

Medians across 337 gastroenterologists in Missouri with Dmand AI profiles that report each measure.

Adam Farmer'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.

See all procedures by Adam Farmer

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Adam Donald Farmer treated 107 Medicare patients in 2024, average age 67

CMS counts 107 Medicare patients who saw Adam Farmer in 2024. The largest group is 65 to 74, with 45 patients. 75% of them have high blood pressure, and 66% have high cholesterol. 37% are also on Medicaid. Their average risk score is 2.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Adam Farmer's median patient age at 59, with 60% women.

Medicare patients, 2024107
Average age67
Average risk score2.60
Also on Medicaid37%

Adam Farmer's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Adam Farmer's Medicare patients by sex, 2024

  • Women5753%
  • Men5047%

Chronic conditions among Adam Farmer's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol66%
  3. Arthritis63%
  4. Anxiety46%
  5. Diabetes40%
  6. Mood disorders40%
  7. Ischemic heart disease37%
  8. Chronic kidney disease36%

Share of Medicare patients with each condition. A patient can have several.

Adam Farmer's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 59

Patient panel by sex, all payers

  • Women60%
  • Men40%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Adam Donald Farmer wrote 105 Medicare Part D claims in 2024

In 2024, Adam Farmer wrote 105 Medicare Part D claims for 85 patients. 84% of them were for generic drugs. CMS names the drug for 59 of them, across 2 drugs with 11 or more claims each, at $902 in total drug cost.

Part D claims, 2024105
Drugs named by CMS2
Total drug cost$902
Part D patients85

Adam Farmer's Part D claims by kind of drug, 2024

  • Generic88 claims84%
  • Brand-name17 claims16%

Adam Farmer'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.

See all prescribing by Adam Farmer

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

Adam Donald Farmer ranks in the 65th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare

Adam Farmer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 56 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Adam Farmer, more than 65% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Where Adam Farmer ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
65th percentile56 procedures
Colonoscopy
59th percentile40 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Adam Donald Farmer has 135 publications on record

Dmand AI links 135 papers to Adam Farmer, published from 2010 to 2025. 2016 was the busiest year, with 10. The most frequent topics are Irritable Bowel Syndrome, Autonomic Nervous System and Pain. Adam Farmer has published most often in Neurogastroenterol Motil. Adam Farmer's most frequent co-authors are Ayesha Akbar, MD, Lisa A. Jones, MD and Aditi Kumar.

Papers135
Years published2010 to 2025

Adam Farmer's papers by year, 2015 to 2025

Topics Adam Farmer writes about most

  • Irritable Bowel Syndrome
  • Autonomic Nervous System
  • Pain
  • Brain
  • Esophagus
  • Constipation
  • Depressive Disorder, Major
  • Gastrointestinal Motility

Adam Farmer's most frequent co-authors

Recent publications by Adam Farmer

See all 135 publications and co-authors

See who Adam Farmer researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Adam Farmer works with, so you can find a warm path to the right gastroenterologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Adam Donald Farmer has worked on 1 clinical trial

Dmand AI links Adam Farmer to 1 clinical trial. Conditions studied include Irritable Bowel Syndrome and Colonic Diseases, Functional.

Conditions in Adam Farmer's trials

  • Irritable Bowel Syndrome
  • Colonic Diseases, Functional

Investigators on the most trials with Adam Farmer

Recent clinical trials with Adam Farmer

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Adam Donald Farmer received $297 in industry payments from 2024 to 2025

CMS Open Payments shows 4 general payments to Adam Farmer from 4 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Ardelyx, Inc. paid the most, $122.

General payments to Adam Farmer by program year, 2024 to 2025

Companies that paid Adam Farmer the most, 2024 to 2025

Share is of all general payments to this clinician.

See all payments to Adam Farmer

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Adam Donald Farmer's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Adam Donald Farmer

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Adam Donald Farmer's NPI number?

Adam Donald Farmer's NPI number is 1942050463. It was assigned on March 26, 2024, and it is active in the NPI Registry.

What does Adam Donald Farmer specialize in?

Adam Donald Farmer is a gastroenterologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Adam Donald Farmer practice?

Adam Farmer practices at 1201 S Grand Blvd, Saint Louis, MO 63104. Adam Farmer's primary practice is SSM Health Saint Louis University Hospital in Saint Louis, Missouri, part of SSM Health Care. Dmand AI also links Adam Farmer to 1 behavioral health center.

What is Adam Donald Farmer's office phone number?

The practice phone on file for Adam Farmer is (314) 257-8000.

What is Adam Donald Farmer's medical license number?

Adam Farmer holds Missouri license 2023045808.

Which hospitals is Adam Donald Farmer affiliated with?

Adam Farmer practices at SSM Health Saint Louis University Hospital in Saint Louis, Missouri. Adam Farmer is also affiliated with Memorial Hospital in Belleville.

What medical group is Adam Donald Farmer part of?

Adam Farmer is linked to SLUCare Physician Group.

Does Adam Donald Farmer accept Medicare?

Yes. CMS data shows Adam Farmer billed Medicare for 97 services in 2024, and Adam Farmer accepts Medicare assignment.

How many Medicare patients does Adam Donald Farmer see?

CMS counts 107 Medicare patients who saw Adam Farmer in 2024, with an average age of 67.

What services does Adam Donald Farmer bill to Medicare?

In 2024, Adam Farmer's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and office visit, established patient (99214).

Show 5 more questionsShow fewer questions

What drugs does Adam Donald Farmer prescribe most?

In 2024 Medicare Part D data, Adam Farmer's most prescribed drugs by claims were Gavilyte-G and Gavilyte-C.

Has Adam Donald Farmer received payments from drug or device companies?

CMS Open Payments shows $297 in general payments to Adam Farmer from 4 companies from 2024 to 2025. The largest total came from Ardelyx, Inc.

How long has Adam Donald Farmer been practicing?

Adam Farmer graduated from medical school in 2001, 25 years ago.

Does Adam Donald Farmer do research?

Dmand AI links 135 publications to Adam Farmer, published from 2010 to 2025. Adam Farmer has worked on 1 clinical trial.

Who does Adam Donald Farmer publish with?

Adam Farmer's most frequent co-authors are Ayesha Akbar, MD (2 shared papers), Lisa A. Jones, MD (2 shared papers) and Aditi Kumar (2 shared papers).

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