Dr. Boris Reznik, MD

  • Hanford, CA
  • Gastroenterologist
NPI1710087846PAC ID9133156839
Medicare services, 2024
279
Medicare patients, 2024
209
Part D claims, 2024
579
Publications
3
MIPS score, 2024
100
Practice address
115 Mall Drive, Hanford, CA 93230
Practice phone
Call (559) 582-9000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Adventist Health Hanford

Hospital · Hanford, California

See all 6 affiliations

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Dr. Boris Reznik is a gastroenterologist in Hanford, California

Dr. Reznik practices at Adventist Health Hanford in Hanford, California, part of Adventist Health.

Dr. Reznik's NPI, 1710087846, was assigned on September 25, 2006. Dr. Reznik graduated from Russian State Medical University in 1980. Dr. Reznik holds California license A91193.

NPI and contact details
Medicare PAC ID
9133156839
NPI enumeration date
September 25, 2006
NPI status
Active
Practice phone
(559) 582-9000
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
72
Medical school graduation
1980

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data

Dr. Boris Reznik practices at Adventist Health Hanford in Hanford, California

Dr. Reznik's primary practice is Adventist Health Hanford, at 115 Mall Drive, Hanford, CA 93230 in Kings County. The practice phone is (559) 582-9000.

Source: Dmand AI Affiliation Data

Dr. Boris Reznik is affiliated with 4 sites of care and 2 medical groups

Dr. Reznik's primary practice is Adventist Health Hanford in Hanford, California, part of Adventist Health. Dr. Reznik is also affiliated with Adventist Health Tulare. The medical group on file is Adventist Health Community Care-Hanford. Dmand AI also links Dr. Reznik to 1 more hospital, 1 rural health clinic and 1 medical group, each named with a free account.

See all 6 affiliations for Dr. Reznik

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

Dmand AI tracks the EHR system at Dr. Boris Reznik's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Reznik practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Adventist Health HanfordAvailable with a free account
+3 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Boris Reznik is one of 1,977 gastroenterologists in California

Gastroenterology is Dr. Reznik's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Reznik is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Reznik's licenses on file in 3 states: California, Utah and New Mexico.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A91193 · 2005 to 2027 · taxonomy 207RG0100X
  • Utah license2003 to 2026
  • New Mexico licenseLicense MD2005-0407 · 2005 to 2009

Clinical focus

Dmand AI lists acid reflux, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, fatty liver, gastroenteritis, gastrointestinal bleeding and hepatitis c among the conditions Dr. Reznik treats.

Gastroenterologists near Dr. Reznik

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. Boris Reznik billed Medicare for 279 services in 2024

CMS data shows 279 Medicare services from Dr. Reznik across 9 procedure codes in 2024, for 209 Medicare patients. Medicare paid $30,009 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024279
Medicare patients209
Paid by Medicare$30,009
Procedure codes9

Dr. Reznik's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Surgery
2023: 1712024: 1826%
Office and hospital visits
2023: 592024: 648%
Other services
2023: 752024: 3356%

Dr. Reznik compared with the California median for gastroenterologists, 2024

  • Dr. Reznik
  • California median
Medicare services
279vs 58652% below
Medicare patients
209vs 30231% below
Part D claims
402vs 3806% above

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Dr. Reznik'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 Dr. Reznik

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Reznik and other gastroenterologists in California.

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

Dr. Boris Reznik treated 209 Medicare patients in 2024, average age 70

CMS counts 209 Medicare patients who saw Dr. Reznik in 2024. The largest group is 65 to 74, with 95 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 69% are also on Medicaid. Their average risk score is 1.71, 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. Reznik's median patient age at 54, with 63% women.

Medicare patients, 2024209
Average age70
Average risk score1.71
Also on Medicaid69%

Dr. Reznik's Medicare patients by age, 2024

Dr. Reznik's Medicare patients by sex, 2024

  • Women11153%
  • Men9847%

Chronic conditions among Dr. Reznik's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis50%
  4. Diabetes47%
  5. Ischemic heart disease38%
  6. Chronic kidney disease28%
  7. Anxiety27%
  8. Mood disorders27%

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

Dr. Reznik's patients across all payers

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

Patient panel by age, all payers

Median age 54

Patient panel by sex, all payers

  • Women63%
  • Men37%

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

Dr. Boris Reznik wrote 579 Medicare Part D claims in 2024

In 2024, Dr. Reznik wrote 579 Medicare Part D claims for 194 patients. 57% of them were for generic drugs. CMS names the drug for 402 of them, across 17 drugs with 11 or more claims each, at $342,135 in total drug cost. In 2023, CMS named 483 claims across 18 drugs.

Part D claims, 2024579
Drugs named by CMS17
Total drug cost$342,135
Part D patients194

Dr. Reznik's Part D claims by kind of drug, 2024

  • Generic330 claims57%
  • Brand-name249 claims43%

Dr. Reznik'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. Reznik's Part D claims, 2024

  • Antibiotics6%37 of 579 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: 4832024: 40217%

Drugs named by CMS: 17 in 2024, 18 in 2023.

See all prescribing by Dr. Reznik

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. Boris Reznik scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Reznik for performance year 2024, reported as part of a group. CMS counts 197 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Reznik, more than 90% of the clinicians it reports for that procedure.

Dr. Reznik's MIPS scores, performance year 2024

  • 100of 100Final score
  • 100of 100Quality
  • 96of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 87of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Reznik ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
90th percentile197 procedures
Colonoscopy
82nd percentile112 procedures

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

Sources: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

For MedTech and pharma teams

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Dr. Boris Reznik has 3 publications on record

Dmand AI links 3 papers to Dr. Reznik, published from 2014 to 2019. The most frequent topics are Gene Expression Regulation, Histones and RNA, Messenger.

Papers3
Years published2014 to 2019

Topics Dr. Reznik writes about most

  • Gene Expression Regulation
  • Histones
  • RNA, Messenger
  • RNA, Small Interfering
  • RNA Stability

Recent publications by Dr. Reznik

See all 3 publications and co-authors

See who Dr. Reznik researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Reznik 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

Dr. Boris Reznik received $10,958 in industry payments from 2016 to 2025

CMS Open Payments shows 443 general payments to Dr. Reznik from 23 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Abbvie Inc. paid the most, $5,459.

General payments to Dr. Reznik by program year, 2016 to 2025

General payments to Dr. Reznik by kind, 2016 to 2025

$11Kin total
  • Food and beverage$10,41695%
  • Speaker and faculty fees$2252%
  • Travel and lodging$2222%
  • Education$951%

Companies that paid Dr. Reznik the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Reznik

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

Dr. Boris Reznik graduated from Russian State Medical University

Dr. Reznik graduated from Russian State Medical University in 1980.

  1. Medical schoolRussian State Medical University
  2. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Boris Reznik accepts plans from 6 insurance carriers

Dr. Reznik is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Blue Cross Blue Shield of Michigan
  • CMS Medicare
  • Humana

Plan types Dr. Reznik accepts, by number of carriers

  1. Medicare4
  2. PPO3
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Boris Reznik'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 percentilesClinician 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-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
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 Dr. Boris Reznik

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. Boris Reznik's NPI number?

Dr. Boris Reznik's NPI number is 1710087846. It was assigned on September 25, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Boris Reznik?

Dr. Boris Reznik is a gastroenterologist in Hanford, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Boris Reznik practice?

Dr. Reznik practices at 115 Mall Drive, Hanford, CA 93230. Dr. Reznik's primary practice is Adventist Health Hanford in Hanford, California, part of Adventist Health. Dmand AI also links Dr. Reznik to 1 hospital, 1 rural health clinic and 1 medical group.

What is Dr. Boris Reznik's office phone number?

The practice phone on file for Dr. Reznik is (559) 582-9000.

What is Dr. Boris Reznik's medical license number?

Dr. Reznik holds California license A91193, one of the licenses on file in 3 states.

Which states has Dr. Boris Reznik been licensed in?

Dmand AI has state licenses on file for Dr. Reznik in California (2005 to 2027), Utah (2003 to 2026) and New Mexico (2005 to 2009).

Which hospitals is Dr. Boris Reznik affiliated with?

Dr. Reznik practices at Adventist Health Hanford in Hanford, California. Dr. Reznik is also affiliated with Adventist Health Tulare. Dmand AI links Dr. Reznik to 1 more hospital.

What medical group is Dr. Boris Reznik part of?

Dr. Reznik is linked to Adventist Health Community Care-Hanford. Dmand AI links Dr. Reznik to 1 more medical group.

Does Dr. Boris Reznik accept Medicare?

Yes. CMS data shows Dr. Reznik billed Medicare for 279 services in 2024.

What is Dr. Boris Reznik's MIPS score?

Dr. Reznik's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Boris Reznik see?

CMS counts 209 Medicare patients who saw Dr. Reznik in 2024, with an average age of 70.

Is Dr. Boris Reznik board certified?

Yes. Dr. Reznik is board certified in internal medicine by the American Board of Internal Medicine.

What services does Dr. Boris Reznik bill to Medicare?

In 2024, Dr. Reznik's most billed Medicare services were surgery: digestive system (43239), hospital inpatient care (99222) and medicare service (G0121).

Where did Dr. Boris Reznik go to medical school?

Dr. Reznik graduated from Russian State Medical University in 1980.

What drugs does Dr. Boris Reznik prescribe most?

In 2024 Medicare Part D data, Dr. Reznik's most prescribed drugs by claims were Linzess, Omeprazole and Peg-3350 And Electrolytes.

Has Dr. Boris Reznik received payments from drug or device companies?

CMS Open Payments shows $10,958 in general payments to Dr. Reznik from 23 companies from 2016 to 2025. The largest total came from Abbvie Inc.

How long has Dr. Boris Reznik been practicing?

Dr. Reznik graduated from medical school in 1980, 46 years ago.

Does Dr. Boris Reznik do research?

Dmand AI links 3 publications to Dr. Reznik, published from 2014 to 2019.

What insurance does Dr. Boris Reznik accept?

Dr. Reznik is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

Selling to gastroenterology practices?

See gastroenterologists in California by site of care and group

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