Pharmacotherapy
Cross InfectionEnterocolitis, PseudomembranousProton Pump Inhibitors
Dr. John Mark Litchfield, DO
NPI1730329533PAC ID8921288465
- Medicare services, 2024
- 1,216
- Medicare patients, 2024
- 574
- Part D claims, 2024
- 2,209
- Publications
- 6
- MIPS score, 2024
- 94
- Practice address
- 2073 Charlie Hall Blvd, Charleston, SC 29414
- Practice phone
- Call (843) 571-0643
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Palmetto Digestive Disease & Endoscopy Center - Charleston
Surgery Center - Medicare-Certified · Charleston, South Carolina
Find Dr. Litchfield's professional email, personal email and mobile number
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Dr. John Mark Litchfield is a gastroenterologist in Charleston, South Carolina
Dr. Litchfield practices at Palmetto Digestive Disease & Endoscopy Center - Charleston in Charleston, South Carolina.
Dr. Litchfield's NPI, 1730329533, was assigned on March 6, 2009. Dr. Litchfield graduated from West Virginia School of Osteopathic Medicine in 2010. Dr. Litchfield holds Tennessee license 2187.
NPI and contact details
- NPI
- 1730329533NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921288465
- NPI enumeration date
- March 6, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (843) 571-0643
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Mark Litchfield practices at Palmetto Digestive Disease & Endoscopy Center - Charleston in Charleston, South Carolina
Dr. Litchfield's primary practice is Palmetto Digestive Disease & Endoscopy Center - Charleston, at 2073 Charlie Hall Blvd, Charleston, SC 29414. The practice phone is (843) 571-0643.
- Palmetto Digestive Disease & Endoscopy Center - Charleston2073 Charlie Hall Blvd, Charleston, SC 29414Phone(843) 571-0643
Source: Dmand AI Affiliation Data
Dr. John Mark Litchfield is affiliated with 5 sites of care and 1 medical group
Dr. Litchfield's primary practice is Palmetto Digestive Disease & Endoscopy Center - Charleston in Charleston, South Carolina. Dr. Litchfield is also affiliated with Roper Hospital. The medical group on file is Palmetto Digestive Health Specialists. Dmand AI also links Dr. Litchfield to 3 more hospitals, each named with a free account.
Palmetto Digestive Disease & Endoscopy Center - CharlestonPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Mark Litchfield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Litchfield practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Palmetto Digestive Disease & Endoscopy Center - Charleston | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Mark Litchfield is one of 255 gastroenterologists in South Carolina
Gastroenterology is Dr. Litchfield's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Litchfield is licensed in Tennessee.
Specialties and state licenses
- Gastroenterology, TennesseePrimary
Gastroenterologists near Dr. Litchfield
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 Mark Litchfield billed Medicare for 1,216 services in 2024
CMS data shows 1,216 Medicare services from Dr. Litchfield across 15 procedure codes in 2024, for 574 Medicare patients. Medicare paid $119,528 for them.
Medicare services, 20241,216
Medicare patients574
Paid by Medicare$119,528
Procedure codes15
Dr. Litchfield's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6612024: 6864%
- Surgery
- 2023: 4182024: 4477%
- Other services
- 2023: 422024: 8398%
- Lab and pathology
- 2023: 1702024: 0100%
Where Dr. Litchfield's Medicare services took place, 2024
- In an office72560%
- In a facility49140%
Dr. Litchfield compared with the South Carolina median for gastroenterologists, 2024
- Dr. Litchfield
- South Carolina median
- Medicare services
- 1,216vs 74563% above
- Medicare patients
- 574vs 44529% above
- Part D claims
- 1,994vs 4974.0 times
Medians across 249 gastroenterologists in South Carolina with Dmand AI profiles that report each measure.
Dr. Litchfield'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. Litchfield?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Litchfield and other gastroenterologists in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Mark Litchfield treated 574 Medicare patients in 2024, average age 73
CMS counts 574 Medicare patients who saw Dr. Litchfield in 2024. The largest group is 65 to 74, with 324 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Litchfield's median patient age at 60, with 55% women.
Medicare patients, 2024574
Average age73
Average risk score1.11
Also on Medicaid3%
Dr. Litchfield's Medicare patients by age, 2024
Dr. Litchfield's Medicare patients by sex, 2024
- Women33759%
- Men23741%
Chronic conditions among Dr. Litchfield's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis51%
- Anxiety29%
- Diabetes29%
- Ischemic heart disease26%
- Mood disorders24%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Litchfield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Mark Litchfield wrote 2,209 Medicare Part D claims in 2024
In 2024, Dr. Litchfield wrote 2,209 Medicare Part D claims for 674 patients. 84% of them were for generic drugs. CMS names the drug for 1,994 of them, across 35 drugs with 11 or more claims each, at $139,764 in total drug cost. In 2023, CMS named 1,800 claims across 37 drugs.
Part D claims, 20242,209
Drugs named by CMS35
Total drug cost$139,764
Part D patients674
Dr. Litchfield's Part D claims by kind of drug, 2024
- Generic1,855 claims84%
- Brand-name354 claims16%
Dr. Litchfield'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. Litchfield's Part D claims, 2024
- Antibiotics7%161 of 2,209 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: 1,8002024: 1,99411%
Drugs named by CMS: 35 in 2024, 37 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. John Mark Litchfield scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Litchfield for performance year 2024, reported as part of a group. Dr. Litchfield accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 131 procedures of colonoscopy by Dr. Litchfield, more than 86% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Litchfield's MIPS scores, performance year 2024
- 94of 100Final score
- 100of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Litchfield ranks in Medicare procedure volume
- Colonoscopy
- 86th percentile131 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 81st percentile125 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Mark Litchfield has 6 publications on record
Dmand AI links 6 papers to Dr. Litchfield, published from 2011 to 2016. Dr. Litchfield has published most often in Clin Mol Allergy. Dr. Litchfield's most frequent co-authors are Guha Krishnaswamy, MD, Casey Elizabeth Watkins, MD and Thomas R. Borthwick, MD.
Papers6
Years published2011 to 2016
Dr. Litchfield's papers by year, 2011 to 2016
Dr. Litchfield's most frequent co-authors
- Guha Krishnaswamy, MD3 shared papers
- Casey Elizabeth Watkins, MD3 shared papers
- Thomas R. Borthwick, MD1 shared paper
Recent publications by Dr. Litchfield
Cardiovasc Hematol Disord Drug Targets
Common Variable ImmunodeficiencyGastrointestinal Neoplasms
See who Dr. Litchfield researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Litchfield 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 Mark Litchfield received $45,183 in industry payments from 2016 to 2025
CMS Open Payments shows 789 general payments to Dr. Litchfield from 48 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 39% of the total. Synergy Pharmaceuticals Inc paid the most, $18,219.
General payments to Dr. Litchfield by program year, 2016 to 2025
General payments to Dr. Litchfield by kind, 2016 to 2025
$45.2Kin total
- Speaker and faculty fees$17,60039%
- Food and beverage$13,59330%
- Education speaker fees$11,60026%
- Travel and lodging$2,3295%
- Other$610%
Companies that paid Dr. Litchfield 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. John Mark Litchfield graduated from West Virginia School of Osteopathic Medicine
Dr. Litchfield graduated from West Virginia School of Osteopathic Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Mark Litchfield'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)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 Mark Litchfield
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 Mark Litchfield's NPI number?
Dr. John Mark Litchfield's NPI number is 1730329533. It was assigned on March 6, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. John Mark Litchfield?
Dr. John Mark Litchfield is a gastroenterologist in Charleston, South Carolina. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John Mark Litchfield practice?
Dr. Litchfield practices at 2073 Charlie Hall Blvd, Charleston, SC 29414. Dr. Litchfield's primary practice is Palmetto Digestive Disease & Endoscopy Center - Charleston in Charleston, South Carolina. Dmand AI also links Dr. Litchfield to 3 hospitals.
What is Dr. John Mark Litchfield's office phone number?
The practice phone on file for Dr. Litchfield is (843) 571-0643.
What is Dr. John Mark Litchfield's medical license number?
Dr. Litchfield holds Tennessee license 2187.
Which hospitals is Dr. John Mark Litchfield affiliated with?
Dr. Litchfield is affiliated with Roper Hospital. Dmand AI links Dr. Litchfield to 3 more hospitals.
What medical group is Dr. John Mark Litchfield part of?
Dr. Litchfield is linked to Palmetto Digestive Health Specialists.
Does Dr. John Mark Litchfield accept Medicare?
Yes. CMS data shows Dr. Litchfield billed Medicare for 1,216 services in 2024, and Dr. Litchfield accepts Medicare assignment.
What is Dr. John Mark Litchfield's MIPS score?
Dr. Litchfield's MIPS final score for performance year 2024 is 94 out of 100, reported as part of a group.
How many Medicare patients does Dr. John Mark Litchfield see?
CMS counts 574 Medicare patients who saw Dr. Litchfield in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
What services does Dr. John Mark Litchfield bill to Medicare?
In 2024, Dr. Litchfield's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and surgery: digestive system (43239).
Where did Dr. John Mark Litchfield go to medical school?
Dr. Litchfield graduated from West Virginia School of Osteopathic Medicine in 2010.
What drugs does Dr. John Mark Litchfield prescribe most?
In 2024 Medicare Part D data, Dr. Litchfield's most prescribed drugs by claims were Famotidine, Pantoprazole Sodium and Omeprazole.
Has Dr. John Mark Litchfield received payments from drug or device companies?
CMS Open Payments shows $45,183 in general payments to Dr. Litchfield from 48 companies from 2016 to 2025. The largest total came from Synergy Pharmaceuticals Inc.
How long has Dr. John Mark Litchfield been practicing?
Dr. Litchfield graduated from medical school in 2010, 16 years ago.
Does Dr. John Mark Litchfield do research?
Dmand AI links 6 publications to Dr. Litchfield, published from 2011 to 2016.
Who does Dr. John Mark Litchfield publish with?
Dr. Litchfield's most frequent co-authors are Guha Krishnaswamy, MD (3 shared papers), Casey Elizabeth Watkins, MD (3 shared papers) and Thomas R. Borthwick, MD (1 shared paper).
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