Am J Physiol Gastrointest Liver Physiol
Active Transport, Cell NucleusCell ProliferationEsophageal Diseases
Dr. Ivan Peter Harnden, MD
NPI1568781706PAC ID0042504268
- Medicare services, 2024
- 407
- Medicare patients, 2024
- 291
- Part D claims, 2024
- 320
- Publications
- 1
- Hospital affiliations
- 4
- Practice address
- 3620 Joseph Siewick Dr, Fairfax, VA 22033
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northern Virginia Surgery Center, LLC - HOPD
Acute Care Hospital outpatient department · Fairfax, Virginia
Find Dr. Harnden'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. Ivan Peter Harnden is a gastroenterologist in Fairfax, Virginia
Dr. Harnden practices at Northern Virginia Surgery Center, LLC - HOPD in Fairfax, Virginia.
Dr. Harnden's NPI, 1568781706, was assigned on May 27, 2010. Dr. Harnden graduated from University of Southern California Keck School of Medicine in 2010. Dr. Harnden holds Virginia license 0101260550.
NPI and contact details
- NPI
- 1568781706NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042504268
- NPI enumeration date
- May 27, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- 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. Ivan Peter Harnden practices at Northern Virginia Surgery Center, LLC - HOPD in Fairfax, Virginia
Dr. Harnden's primary practice is Northern Virginia Surgery Center, LLC - HOPD, at 3620 Joseph Siewick Dr, Fairfax, VA 22033.
- Northern Virginia Surgery Center, LLC - HOPD3620 Joseph Siewick Dr, Fairfax, VA 22033
Source: Dmand AI Affiliation Data
Dr. Ivan Peter Harnden is affiliated with 8 sites of care and 3 medical groups
Dr. Harnden's primary practice is Northern Virginia Surgery Center, LLC - HOPD in Fairfax, Virginia. Dr. Harnden is also affiliated with Inova Fair Oaks Hospital. The medical group on file is Inova Urgent Care Center. Dmand AI also links Dr. Harnden to 3 more hospitals, 2 medical groups, 1 group practice or clinic, 1 hospital outpatient department and 1 ambulatory surgery center, each named with a free account.
Northern Virginia Surgery Center, LLC - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ivan Peter Harnden's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Harnden practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northern Virginia Surgery Center, LLC - HOPD | Available with a free account |
| +7 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Ivan Peter Harnden is one of 494 gastroenterologists in Virginia
Gastroenterology is Dr. Harnden's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Harnden's licenses on file in 2 states: Virginia and North Carolina.
Specialties and state licenses
- Gastroenterology, VirginiaPrimary
- North Carolina license
Gastroenterologists near Dr. Harnden
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. Ivan Peter Harnden billed Medicare for 407 services in 2024
CMS data shows 407 Medicare services from Dr. Harnden across 10 procedure codes in 2024, for 291 Medicare patients. Medicare paid $45,364 for them.
Medicare services, 2024407
Medicare patients291
Paid by Medicare$45,364
Procedure codes10
Dr. Harnden's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2852024: 2657%
- Office and hospital visits
- 2023: 3912024: 12568%
- Tests and treatments
- 2023: 02024: 17
- Other services
- 2023: 162024: 0100%
Where Dr. Harnden's Medicare services took place, 2024
- In an office17042%
- In a facility23758%
Dr. Harnden compared with the Virginia median for gastroenterologists, 2024
- Dr. Harnden
- Virginia median
- Medicare services
- 407vs 52422% below
- Medicare patients
- 291vs 36220% below
- Part D claims
- 232vs 29020% below
Medians across 484 gastroenterologists in Virginia with Dmand AI profiles that report each measure.
Dr. Harnden'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. Harnden?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Harnden and other gastroenterologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ivan Peter Harnden treated 291 Medicare patients in 2024, average age 73
CMS counts 291 Medicare patients who saw Dr. Harnden in 2024. The largest group is 65 to 74, with 148 patients. 75% of them have high cholesterol, and 69% have high blood pressure. 9% are also on Medicaid. Their average risk score is 1.41, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Harnden's median patient age at 55, with 54% women.
Medicare patients, 2024291
Average age73
Average risk score1.41
Also on Medicaid9%
Dr. Harnden's Medicare patients by age, 2024
Dr. Harnden's Medicare patients by sex, 2024
- Women14851%
- Men14349%
Chronic conditions among Dr. Harnden's Medicare patients, 2024
- High cholesterol75%
- High blood pressure69%
- Arthritis46%
- Ischemic heart disease33%
- Diabetes31%
- Chronic kidney disease27%
- Cancer25%
- Atrial fibrillation22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Harnden's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ivan Peter Harnden wrote 320 Medicare Part D claims in 2024
In 2024, Dr. Harnden wrote 320 Medicare Part D claims for 158 patients. 77% of them were for generic drugs. CMS names the drug for 232 of them, across 9 drugs with 11 or more claims each, at $18,683 in total drug cost. In 2023, CMS named 234 claims across 8 drugs.
Part D claims, 2024320
Drugs named by CMS9
Total drug cost$18,683
Part D patients158
Dr. Harnden's Part D claims by kind of drug, 2024
- Generic245 claims77%
- Brand-name75 claims23%
Dr. Harnden'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2342024: 2321%
Drugs named by CMS: 9 in 2024, 8 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. Ivan Peter Harnden ranks in the 89th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Harnden accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Harnden as offering telehealth. CMS counts 188 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Harnden, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Harnden ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 89th percentile188 procedures
- Colonoscopy
- 88th percentile144 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of skin lesions: 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. Ivan Peter Harnden has 1 publication on record
Dmand AI links 1 paper to Dr. Harnden in 2017. Dr. Harnden's most frequent co-author is Katherine Schuver Garman, MD.
Papers1
Dr. Harnden's most frequent co-authors
Recent publications by Dr. Harnden
See who Dr. Harnden researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Harnden 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. Ivan Peter Harnden received $7,472 in industry payments from 2016 to 2025
CMS Open Payments shows 258 general payments to Dr. Harnden from 38 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 75% of the total. Boston Scientific Corporation paid the most, $2,417.
General payments to Dr. Harnden by program year, 2016 to 2025
General payments to Dr. Harnden by kind, 2016 to 2025
$7.5Kin total
- Food and beverage$5,59275%
- Travel and lodging$1,88025%
Companies that paid Dr. Harnden 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. Ivan Peter Harnden graduated from University of Southern California Keck School of Medicine
Dr. Harnden graduated from University of Southern California Keck School of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ivan Peter Harnden'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 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) |
| 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. Ivan Peter Harnden
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. Ivan Peter Harnden's NPI number?
Dr. Ivan Peter Harnden's NPI number is 1568781706. It was assigned on May 27, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Ivan Peter Harnden?
Dr. Ivan Peter Harnden is a gastroenterologist in Fairfax, Virginia. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Ivan Peter Harnden practice?
Dr. Harnden practices at 3620 Joseph Siewick Dr, Fairfax, VA 22033. Dr. Harnden's primary practice is Northern Virginia Surgery Center, LLC - HOPD in Fairfax, Virginia. Dmand AI also links Dr. Harnden to 3 hospitals, 2 medical groups, 1 group practice or clinic, 1 hospital outpatient department and 1 ambulatory surgery center.
What is Dr. Ivan Peter Harnden's medical license number?
Dr. Harnden holds Virginia license 0101260550, one of the licenses on file in 2 states.
Which states has Dr. Ivan Peter Harnden been licensed in?
Dmand AI has state licenses on file for Dr. Harnden in Virginia and North Carolina.
Which hospitals is Dr. Ivan Peter Harnden affiliated with?
Dr. Harnden is affiliated with Inova Fair Oaks Hospital. Dmand AI links Dr. Harnden to 3 more hospitals.
What medical group is Dr. Ivan Peter Harnden part of?
Dr. Harnden is linked to Inova Urgent Care Center. Dmand AI links Dr. Harnden to 2 more medical groups.
Does Dr. Ivan Peter Harnden accept Medicare?
Yes. CMS data shows Dr. Harnden billed Medicare for 407 services in 2024, and Dr. Harnden accepts Medicare assignment.
Does Dr. Ivan Peter Harnden offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Harnden as offering telehealth services.
How many Medicare patients does Dr. Ivan Peter Harnden see?
CMS counts 291 Medicare patients who saw Dr. Harnden in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
What services does Dr. Ivan Peter Harnden bill to Medicare?
In 2024, Dr. Harnden's most billed Medicare services were surgery: digestive system (45380), surgery: digestive system (45385) and surgery: digestive system (43239).
Where did Dr. Ivan Peter Harnden go to medical school?
Dr. Harnden graduated from University of Southern California Keck School of Medicine in 2010.
What drugs does Dr. Ivan Peter Harnden prescribe most?
In 2024 Medicare Part D data, Dr. Harnden's most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Omeprazole.
Has Dr. Ivan Peter Harnden received payments from drug or device companies?
CMS Open Payments shows $7,472 in general payments to Dr. Harnden from 38 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Ivan Peter Harnden been practicing?
Dr. Harnden graduated from medical school in 2010, 16 years ago.
Does Dr. Ivan Peter Harnden do research?
Dmand AI links 1 publication to Dr. Harnden.
Who does Dr. Ivan Peter Harnden publish with?
Dr. Harnden's most frequent co-authors are Katherine Schuver Garman, MD (1 shared paper).
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