Catherine Louise Ly, D.O.
Gastroenterology Physician · Cleveland, OH
Catherine Louise Ly, D.O. is a gastroenterology physician with a practice address in Cleveland, Ohio, and NPI 1750523783, issued on Apr 6, 2009. Check the license (Ohio 34.013947, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Catherine Louise Ly
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 34.013947 OH
036.129366 IL
Self-reported in NPPES; status is on the state search - Practice location
- 9500 Euclid Ave, Cleveland, OH 44195
- Phone
- (216) 444-2200
- Enumerated
- Apr 6, 2009
- Record last updated
- Jul 8, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190723002771); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 741 in Ohio → Look up another NPI →
Also registered at 9500 Euclid Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mohammad Abbasi, MDClinical Cardiac Electrophysiology Physician1346730603
- Mahmoud AbbassyStudent in an Organized Health Care Education/Training Program1366872574
- Cassandra Abbatemarco, CNPPsychiatric/Mental Health Nurse Practitioner1417645144
- Walid Abboud, MDInternal Medicine Physician1245295559
Verify Catherine Louise Ly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 34.013947Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% more Medicare Part D claims than the average gastroenterology physician in 2024
1,074 Medicare Part D claims for 361 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Pantoprazole Sodium308 claims
- Omeprazole176 claims
- Famotidine95 claims
- Linzess56 claims
- Dicyclomine Hcl43 claims
- Sucralfate28 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $876.58
41 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- North Coast Professional Company, LLCSandusky, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Louise Ly among 741 gastroenterology physician records in Ohio
Catherine Louise Ly, D.O. is one of 741 gastroenterology physician records with a practice address in Ohio. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2009 · median 2003 among the 540 with a school on file
- Record last updated2019 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Ohio
There are 741 gastroenterology physician records in Ohio.
All 741 in Ohio → Every provider in Cleveland → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Edgar Achkar, MDCleveland, OH 441951881659688
- Jean-Paul Achkar, M.D.Cleveland, OH 441951467417261
- David Barnes, M.D.Cleveland, OH 441951053376327
- Aaron Brzezinski, MDCleveland, OH 441951811952369
- Carol Burke, M.D.Cleveland, OH 441951588629554
- William Carey, MDCleveland, OH 441951033172879
- Gavin Harewood, M.D.Cleveland, OH 441951255317285
- Michelle Inkster, M.D.Cleveland, OH 441951992762124
Common questions
What is Catherine Louise Ly, D.O.'s NPI number?
Catherine Louise Ly, D.O.'s National Provider Identifier (NPI) is 1750523783, issued on Apr 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Louise Ly, D.O. located?
The NPPES record lists a practice address at 9500 Euclid Ave, Cleveland, OH, 44195. Phone: (216) 444-2200. Providers update this record themselves, so call before visiting.
How can I verify Catherine Louise Ly, D.O.'s license?
NPPES lists Ohio license number 34.013947, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine Louise Ly, D.O. prescribe under Medicare Part D?
In 2024, Catherine Louise Ly, D.O. had 1,074 Medicare Part D claims for 361 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.