Dr. Lester C. Ong, MD
- Medicare services, 2024
- 7,173
- Medicare patients, 2024
- 528
- Part D claims, 2024
- 19,647
- MIPS score, 2024
- 93
- Hospital affiliations
- 2
- Practice address
- 150 River North Blvd, Stephenville, TX 76401
- Practice phone
- Call (254) 918-2210
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The Surgical & Endoscopic Center of Stephenville
Stephenville, Texas
Find Dr. Ong'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. Lester C. Ong is an internist in Stephenville, Texas
Dr. Ong practices at The Surgical & Endoscopic Center of Stephenville in Stephenville, Texas.
Dr. Ong's NPI, 1255337119, was assigned on June 24, 2005. Dr. Ong graduated from University of Santo Tomas in 1988. Dr. Ong holds Texas license K1603.
- NPI
- 1255337119NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951396837
- NPI enumeration date
- June 24, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (254) 918-2210
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lester C. Ong practices at The Surgical & Endoscopic Center of Stephenville in Stephenville, Texas
Dr. Ong's primary practice is The Surgical & Endoscopic Center of Stephenville, at 150 River North Blvd, Stephenville, TX 76401 in Erath County. The practice phone is (254) 918-2210.
- The Surgical & Endoscopic Center of Stephenville150 River North Blvd, Stephenville, TX 76401 · Erath CountyPhone(254) 918-2210
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Lester C. Ong is affiliated with 12 sites of care and 2 medical groups
Dr. Ong's primary practice is The Surgical & Endoscopic Center of Stephenville in Stephenville, Texas. Dr. Ong is also affiliated with Texas Health Stephenville. The medical group on file is Texas Health Care. Dmand AI also links Dr. Ong to 1 more hospital, 3 skilled nursing facilities, 2 group practices and clinics, 2 home health agencies, 2 hospices and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Lester C. Ong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ong practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Surgical & Endoscopic Center of Stephenville | Available with a free account |
| +11 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lester C. Ong is one of 8,437 internists in Texas
Internal medicine is Dr. Ong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ong is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Ong's licenses on file in 2 states: Texas and Michigan.
Specialties and state licenses
- Internal medicine, TexasPrimary
- Michigan license
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute mini-stroke (TIA), acute sinusitis, acute skin infection, alzheimer's disease, aneurysm and anxiety among the conditions Dr. Ong treats.
Internists near Dr. Ong
Counts of internists 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. Lester C. Ong billed Medicare for 7,173 services in 2024
CMS data shows 7,173 Medicare services from Dr. Ong across 50 procedure codes in 2024, for 528 Medicare patients. Medicare paid $196,316 for them.
Dr. Ong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,6392024: 1,87715%
- Lab and pathology
- 2023: 1,3532024: 1,75830%
- Drugs given in the office
- 2023: 1212024: 1,5021141%
- Other services
- 2023: 5072024: 1,125122%
- Surgery
- 2023: 5512024: 5373%
- Imaging
- 2023: 2412024: 2535%
- Tests and treatments
- 2023: 1682024: 12128%
Where Dr. Ong's Medicare services took place, 2024
- In an office6,97297%
- In a facility2013%
Dr. Ong compared with the Texas median for internists, 2024
- Dr. Ong
- Texas median
- Medicare services
- 7,173vs 53913.3 times
- Medicare patients
- 528vs 1902.8 times
- Part D claims
- 18,948vs 28965.6 times
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Ong'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lester C. Ong treated 528 Medicare patients in 2024, average age 76
CMS counts 528 Medicare patients who saw Dr. Ong in 2024. The largest group is 65 to 74, with 215 patients. 75% of them have high blood pressure, and 62% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.28, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ong's median patient age at 70, with 52% women.
Dr. Ong's Medicare patients by age, 2024
Dr. Ong's Medicare patients by sex, 2024
- Women28955%
- Men23945%
Chronic conditions among Dr. Ong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol62%
- Arthritis42%
- Chronic kidney disease30%
- Depression29%
- Mood disorders29%
- Ischemic heart disease27%
- Diabetes25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lester C. Ong wrote 19,647 Medicare Part D claims in 2024
In 2024, Dr. Ong wrote 19,647 Medicare Part D claims for 929 patients. 85% of them were for generic drugs. CMS names the drug for 18,948 of them, across 248 drugs with 11 or more claims each, at $1,198,863 in total drug cost. In 2023, CMS named 18,617 claims across 238 drugs.
Dr. Ong's Part D claims by kind of drug, 2024
- Generic16,785 claims85%
- Brand-name2,732 claims14%
- Other130 claims1%
Dr. Ong'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. Ong's Part D claims, 2024
- Opioids6%1,216 of 19,647 claims
- Antibiotics4%807 of 19,647 claims
- Antipsychotics, patients 65 and over1%180 of 19,647 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: 18,6172024: 18,9482%
Drugs named by CMS: 248 in 2024, 238 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. Lester C. Ong scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Ong for performance year 2024, reported through an alternative payment model (APM). Dr. Ong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Ong's MIPS scores, performance year 2024
- 93of 100Final score
- 85.6of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Lester C. Ong received $4,597 in industry payments from 2016 to 2025
CMS Open Payments shows 295 general payments to Dr. Ong from 51 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Janssen Pharmaceuticals, Inc paid the most, $358.
General payments to Dr. Ong by program year, 2016 to 2025
General payments to Dr. Ong by kind, 2016 to 2025
- Food and beverage$4,52298%
- Education$742%
Companies that paid Dr. Ong 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. Lester C. Ong graduated from University of Santo Tomas
Dr. Ong graduated from University of Santo Tomas in 1988.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Lester C. Ong accepts plans from 23 insurance carriers
Dr. Ong is in network with 23 carriers, including Elevance, Aetna and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Excellus BlueCross BlueShield
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Aspirus Health Plan
- +15 more carriersWith a free account
Plan types Dr. Ong accepts, by number of carriers
- PPO14
- HMO12
- Medicare10
- POS7
- EPO5
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Lester C. Ong'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Lester C. Ong
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. Lester C. Ong's NPI number?
Dr. Lester C. Ong's NPI number is 1255337119. It was assigned on June 24, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Lester C. Ong?
Dr. Lester C. Ong is an internist in Stephenville, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Lester C. Ong practice?
Dr. Ong practices at 150 River North Blvd, Stephenville, TX 76401. Dr. Ong's primary practice is The Surgical & Endoscopic Center of Stephenville in Stephenville, Texas. Dmand AI also links Dr. Ong to 1 hospital, 3 skilled nursing facilities, 2 group practices and clinics, 2 home health agencies, 2 hospices and 1 medical group.
What is Dr. Lester C. Ong's office phone number?
The practice phone on file for Dr. Ong is (254) 918-2210.
What is Dr. Lester C. Ong's medical license number?
Dr. Ong holds Texas license K1603, one of the licenses on file in 2 states.
Which states has Dr. Lester C. Ong been licensed in?
Dmand AI has state licenses on file for Dr. Ong in Texas (1996 to 2027) and Michigan (1996 to 2000).
Which hospitals is Dr. Lester C. Ong affiliated with?
Dr. Ong is affiliated with Texas Health Stephenville. Dmand AI links Dr. Ong to 1 more hospital.
What medical group is Dr. Lester C. Ong part of?
Dr. Ong is linked to Texas Health Care. Dmand AI links Dr. Ong to 1 more medical group.
Does Dr. Lester C. Ong accept Medicare?
Yes. CMS data shows Dr. Ong billed Medicare for 7,173 services in 2024, and Dr. Ong accepts Medicare assignment.
What is Dr. Lester C. Ong's MIPS score?
Dr. Ong's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Lester C. Ong see?
CMS counts 528 Medicare patients who saw Dr. Ong in 2024, with an average age of 76.
Is Dr. Lester C. Ong board certified?
Yes. Dr. Ong is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Lester C. Ong bill to Medicare?
In 2024, Dr. Ong's most billed Medicare services were injected or infused drug (J1010), office visit, established patient (99213) and medicare service (G2211).
Where did Dr. Lester C. Ong go to medical school?
Dr. Ong graduated from University of Santo Tomas in 1988.
What drugs does Dr. Lester C. Ong prescribe most?
In 2024 Medicare Part D data, Dr. Ong's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Gabapentin.
Has Dr. Lester C. Ong received payments from drug or device companies?
CMS Open Payments shows $4,597 in general payments to Dr. Ong from 51 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Lester C. Ong been practicing?
Dr. Ong graduated from medical school in 1988, 38 years ago.
What insurance does Dr. Lester C. Ong accept?
Dr. Ong is in network with 23 carriers, including Elevance, Aetna and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.
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