Dr. Lawrence A. Szarka, MD

  • Rochester, MN
  • Gastroenterologist
NPI1619949815PAC ID8628134269
Medicare services, 2024
297
Medicare patients, 2024
290
Part D claims, 2024
294
Publications
26
Hospital affiliations
2
Practice address
1216 Second Street Southwest, Rochester, MN 55902
Practice phone
Call (507) 255-5123
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Mayo Clinic Hospital, Saint Marys Campus

Hospital · Rochester, Minnesota

See all 7 affiliations

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Dr. Lawrence A. Szarka is a gastroenterologist in Rochester, Minnesota

Dr. Szarka practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic.

Dr. Szarka's NPI, 1619949815, was assigned on February 2, 2006. Dr. Szarka holds Minnesota license 38348.

NPI and contact details
Medicare PAC ID
8628134269
NPI enumeration date
February 2, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(507) 255-5123
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
58
Medical school graduation
1994

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

Dr. Lawrence A. Szarka practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota

Dr. Szarka's primary practice is Mayo Clinic Hospital, Saint Marys Campus, at 1216 Second Street Southwest, Rochester, MN 55902 in Olmsted County. The practice phone is (507) 255-5123.

Source: Dmand AI Affiliation Data

Dr. Lawrence A. Szarka is affiliated with 3 sites of care and 4 medical groups

Dr. Szarka's primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. Dr. Szarka is also affiliated with Mayo Clinic Hospital. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Szarka to 3 more medical groups and 1 hospice, each named with a free account.

See all 7 affiliations for Dr. Szarka

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

Dmand AI tracks the EHR system at Dr. Lawrence A. Szarka's practice

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

EHR by site
SiteEHR vendor and product
Mayo Clinic Hospital, Saint Marys CampusAvailable with a free account
+2 more sites and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Lawrence A. Szarka is one of 366 gastroenterologists in Minnesota

Gastroenterology is Dr. Szarka's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Szarka's licenses on file in 2 states: Minnesota and Arizona.

Specialties and state licenses

  • Gastroenterology, MinnesotaPrimaryLicense 38348 · taxonomy 207RG0100X
  • Arizona licenseLicense 29042

Gastroenterologists near Dr. Szarka

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. Lawrence A. Szarka billed Medicare for 297 services in 2024

CMS data shows 297 Medicare services from Dr. Szarka across 9 procedure codes in 2024, for 290 Medicare patients. Medicare paid $18,648 for them.

Medicare services, 2024297
Medicare patients290
Paid by Medicare$18,648
Procedure codes9

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

  • 2023
  • 2024
Office and hospital visits
2023: 1512024: 21542%
Tests and treatments
2023: 1182024: 8231%

Where Dr. Szarka's Medicare services took place, 2024

  • In an office21572%
  • In a facility8228%

Dr. Szarka compared with the Minnesota median for gastroenterologists, 2024

  • Dr. Szarka
  • Minnesota median
Medicare services
297vs 2748% above
Medicare patients
290vs 19846% above
Part D claims
193vs 14236% above

Medians across 380 gastroenterologists in Minnesota with Dmand AI profiles that report each measure.

Dr. Szarka'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. Szarka

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

Dr. Lawrence A. Szarka treated 290 Medicare patients in 2024, average age 72

CMS counts 290 Medicare patients who saw Dr. Szarka in 2024. The largest group is 65 to 74, with 137 patients. 65% of them have high cholesterol, and 59% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.45, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Szarka's median patient age at 59, with 64% women.

Medicare patients, 2024290
Average age72
Average risk score1.45
Also on Medicaid8%

Dr. Szarka's Medicare patients by age, 2024

Dr. Szarka's Medicare patients by sex, 2024

  • Women17560%
  • Men11540%

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

  1. High cholesterol65%
  2. High blood pressure59%
  3. Arthritis49%
  4. Anxiety31%
  5. Chronic kidney disease29%
  6. Ischemic heart disease26%
  7. Mood disorders26%
  8. Osteoporosis23%

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

Dr. Szarka'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

  • Women64%
  • Men36%

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

Dr. Lawrence A. Szarka wrote 294 Medicare Part D claims in 2024

In 2024, Dr. Szarka wrote 294 Medicare Part D claims for 101 patients. 63% of them were for generic drugs. CMS names the drug for 193 of them, across 9 drugs with 11 or more claims each, at $43,676 in total drug cost. In 2023, CMS named 97 claims across 4 drugs.

Part D claims, 2024294
Drugs named by CMS9
Total drug cost$43,676
Part D patients101

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

  • Generic185 claims63%
  • Brand-name109 claims37%

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

  • Antibiotics14%40 of 294 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: 972024: 19399%

Drugs named by CMS: 9 in 2024, 4 in 2023.

See all prescribing by Dr. Szarka

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. Lawrence A. Szarka offers telehealth to Medicare patients

Dr. Szarka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Szarka as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Lawrence A. Szarka has 26 publications on record

Dmand AI links 26 papers to Dr. Szarka, published from 2008 to 2023. 2015 was the busiest year, with 4. The most frequent topics are Gastrointestinal Diseases, Manometry and Constipation. Dr. Szarka has published most often in Neurogastroenterol Motil. Dr. Szarka's most frequent co-authors are Michael Joseph Camilleri, MD, Christopher J. Gostout, MD and Ernest P. Bouras, MD.

Papers26
Years published2008 to 2023

Dr. Szarka's papers by year, 2012 to 2023

Topics Dr. Szarka writes about most

  • Gastrointestinal Diseases
  • Manometry
  • Constipation
  • Anal Canal
  • Double-Blind Method
  • Fecal Incontinence
  • Gastric Emptying
  • Gastrointestinal Transit

Dr. Szarka's most frequent co-authors

Recent publications by Dr. Szarka

See all 26 publications and co-authors

See who Dr. Szarka researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Szarka 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. Lawrence A. Szarka received $200 in industry payments in 2018

CMS Open Payments shows 1 general payment to Dr. Szarka from 1 drug or device company in 2018. Speaker and faculty fees make up the largest share, 100% of the total. Shire North American Group Inc paid the most, $200.

Companies that paid Dr. Szarka the most, 2018 to 2018

Share is of all general payments to this clinician.

See all payments to Dr. Szarka

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

Sources for Dr. Lawrence A. Szarka'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)
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)
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. Lawrence A. Szarka

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. Lawrence A. Szarka's NPI number?

Dr. Lawrence A. Szarka's NPI number is 1619949815. It was assigned on February 2, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Lawrence A. Szarka?

Dr. Lawrence A. Szarka is a gastroenterologist in Rochester, Minnesota. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Lawrence A. Szarka practice?

Dr. Szarka practices at 1216 Second Street Southwest, Rochester, MN 55902. Dr. Szarka's primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. Dmand AI also links Dr. Szarka to 3 medical groups and 1 hospice.

What is Dr. Lawrence A. Szarka's office phone number?

The practice phone on file for Dr. Szarka is (507) 255-5123.

What is Dr. Lawrence A. Szarka's medical license number?

Dr. Szarka holds Minnesota license 38348, one of the licenses on file in 2 states.

Which states has Dr. Lawrence A. Szarka been licensed in?

Dmand AI has state licenses on file for Dr. Szarka in Minnesota and Arizona.

Which hospitals is Dr. Lawrence A. Szarka affiliated with?

Dr. Szarka practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota. Dr. Szarka is also affiliated with Mayo Clinic Hospital.

What medical group is Dr. Lawrence A. Szarka part of?

Dr. Szarka is linked to Mayo Clinic. Dmand AI links Dr. Szarka to 3 more medical groups.

Does Dr. Lawrence A. Szarka accept Medicare?

Yes. CMS data shows Dr. Szarka billed Medicare for 297 services in 2024, and Dr. Szarka accepts Medicare assignment.

Does Dr. Lawrence A. Szarka offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Szarka as offering telehealth services.

Show 7 more questionsShow fewer questions

How many Medicare patients does Dr. Lawrence A. Szarka see?

CMS counts 290 Medicare patients who saw Dr. Szarka in 2024, with an average age of 72.

What services does Dr. Lawrence A. Szarka bill to Medicare?

In 2024, Dr. Szarka's most billed Medicare services were digestive system test (91122), office visit, new patient (99203) and care management and other visits (99451).

What drugs does Dr. Lawrence A. Szarka prescribe most?

In 2024 Medicare Part D data, Dr. Szarka's most prescribed drugs by claims were Linzess, Omeprazole and Gavilyte-G.

Has Dr. Lawrence A. Szarka received payments from drug or device companies?

CMS Open Payments shows $200 in general payments to Dr. Szarka from 1 company from 2018 to 2018. The largest total came from Shire North American Group Inc.

How long has Dr. Lawrence A. Szarka been practicing?

Dr. Szarka graduated from medical school in 1994, 32 years ago.

Does Dr. Lawrence A. Szarka do research?

Dmand AI links 26 publications to Dr. Szarka, published from 2008 to 2023.

Who does Dr. Lawrence A. Szarka publish with?

Dr. Szarka's most frequent co-authors are Michael Joseph Camilleri, MD (8 shared papers), Christopher J. Gostout, MD (4 shared papers) and Ernest P. Bouras, MD (3 shared papers).

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