Dr. Gregory Mathias Lam, DO
- Medicare services, 2024
- 714
- Medicare patients, 2024
- 480
- Part D claims, 2024
- 838
- Hospital affiliations
- 5
- Industry payments
- $10,842
- Practice address
- 7661 Beechmont Avenue Suite 100, Cincinnati, OH 45255
- Practice phone
- Call (513) 624-4150
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Anderson Endoscopy Center
Surgery Center - Medicare-Certified · Cincinnati, Ohio
Find Dr. Lam's professional email, personal email and mobile number
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Dr. Gregory Mathias Lam is a gastroenterologist in Cincinnati, Ohio
Dr. Lam practices at Anderson Endoscopy Center in Cincinnati, Ohio.
Dr. Lam's NPI, 1861416596, was assigned on July 26, 2006. Dr. Lam holds Ohio license 34.013404.
- NPI
- 1861416596NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840297008
- NPI enumeration date
- July 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (513) 624-4150
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Mathias Lam practices at Anderson Endoscopy Center in Cincinnati, Ohio
Dr. Lam's primary practice is Anderson Endoscopy Center, at 7661 Beechmont Avenue Suite 100, Cincinnati, OH 45255. The practice phone is (513) 624-4150.
- Anderson Endoscopy Center7661 Beechmont Avenue Suite 100, Cincinnati, OH 45255Phone(513) 624-4150
Source: Dmand AI Affiliation Data
Dr. Gregory Mathias Lam is affiliated with 7 sites of care and 2 medical groups
Dr. Lam's primary practice is Anderson Endoscopy Center in Cincinnati, Ohio. Dr. Lam is also affiliated with Bethesda North Hospital. The medical group on file is St. Elizabeth Physicians. Dmand AI also links Dr. Lam to 4 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Mathias Lam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lam practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Anderson Endoscopy Center | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Mathias Lam is one of 692 gastroenterologists in Ohio
Gastroenterology is Dr. Lam's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Lam's licenses on file in 2 states: Ohio and Kentucky.
Specialties and state licenses
- Gastroenterology, OhioPrimary
- Kentucky license
Gastroenterologists near Dr. Lam
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. Gregory Mathias Lam billed Medicare for 714 services in 2024
CMS data shows 714 Medicare services from Dr. Lam across 16 procedure codes in 2024, for 480 Medicare patients. Medicare paid $79,345 for them.
Dr. Lam's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 4152024: 46612%
- Office and hospital visits
- 2023: 2562024: 2329%
- Other services
- 2023: 292024: 1645%
Where Dr. Lam's Medicare services took place, 2024
- In an office7410%
- In a facility64090%
Dr. Lam compared with the Ohio median for gastroenterologists, 2024
- Dr. Lam
- Ohio median
- Medicare services
- 714vs 40477% above
- Medicare patients
- 480vs 28867% above
- Part D claims
- 685vs 40270% above
Medians across 687 gastroenterologists in Ohio with Dmand AI profiles that report each measure.
Dr. Lam'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. Lam?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lam and other gastroenterologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Mathias Lam treated 480 Medicare patients in 2024, average age 73
CMS counts 480 Medicare patients who saw Dr. Lam in 2024. The largest group is 65 to 74, with 244 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.54, 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. Lam's median patient age at 61, with 55% women.
Dr. Lam's Medicare patients by age, 2024
Dr. Lam's Medicare patients by sex, 2024
- Women26655%
- Men21445%
Chronic conditions among Dr. Lam's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease41%
- Mood disorders36%
- Anxiety34%
- Depression34%
- Diabetes34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lam's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Mathias Lam wrote 838 Medicare Part D claims in 2024
In 2024, Dr. Lam wrote 838 Medicare Part D claims for 453 patients. 76% of them were for generic drugs. CMS names the drug for 685 of them, across 16 drugs with 11 or more claims each, at $246,840 in total drug cost. In 2023, CMS named 485 claims across 13 drugs.
Dr. Lam's Part D claims by kind of drug, 2024
- Generic637 claims76%
- Brand-name201 claims24%
Dr. Lam'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. Lam's Part D claims, 2024
- Antibiotics5%42 of 838 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: 4852024: 68541%
Drugs named by CMS: 16 in 2024, 13 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. Gregory Mathias Lam ranks in the 97th percentile for colonoscopy in Medicare
Dr. Lam accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 267 procedures of colonoscopy by Dr. Lam, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Lam ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 96th percentile332 procedures
- Colonoscopy
- 97th percentile267 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory Mathias Lam received $10,842 in industry payments from 2016 to 2025
CMS Open Payments shows 406 general payments to Dr. Lam from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 51% of the total. Olympus Corporation of the Americas paid the most, $4,545.
General payments to Dr. Lam by program year, 2016 to 2025
General payments to Dr. Lam by kind, 2016 to 2025
- Food and beverage$5,48051%
- Travel and lodging$5,33649%
- Education$260%
Companies that paid Dr. Lam the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory Mathias Lam'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 DataDmand AI Org Hierarchy 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Gregory Mathias Lam
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. Gregory Mathias Lam's NPI number?
Dr. Gregory Mathias Lam's NPI number is 1861416596. It was assigned on July 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Mathias Lam?
Dr. Gregory Mathias Lam is a gastroenterologist in Cincinnati, Ohio. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Gregory Mathias Lam practice?
Dr. Lam practices at 7661 Beechmont Avenue Suite 100, Cincinnati, OH 45255. Dr. Lam's primary practice is Anderson Endoscopy Center in Cincinnati, Ohio. Dmand AI also links Dr. Lam to 4 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Gregory Mathias Lam's office phone number?
The practice phone on file for Dr. Lam is (513) 624-4150.
What is Dr. Gregory Mathias Lam's medical license number?
Dr. Lam holds Ohio license 34.013404, one of the licenses on file in 2 states.
Which states has Dr. Gregory Mathias Lam been licensed in?
Dmand AI has state licenses on file for Dr. Lam in Ohio and Kentucky.
Which hospitals is Dr. Gregory Mathias Lam affiliated with?
Dr. Lam is affiliated with Bethesda North Hospital. Dmand AI links Dr. Lam to 4 more hospitals.
What medical group is Dr. Gregory Mathias Lam part of?
Dr. Lam is linked to St. Elizabeth Physicians. Dmand AI links Dr. Lam to 1 more medical group.
Does Dr. Gregory Mathias Lam accept Medicare?
Yes. CMS data shows Dr. Lam billed Medicare for 714 services in 2024, and Dr. Lam accepts Medicare assignment.
How many Medicare patients does Dr. Gregory Mathias Lam see?
CMS counts 480 Medicare patients who saw Dr. Lam in 2024, with an average age of 73.
Show 4 more questionsShow fewer questions
What services does Dr. Gregory Mathias Lam bill to Medicare?
In 2024, Dr. Lam's most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (43239) and hospital inpatient care (99232).
What drugs does Dr. Gregory Mathias Lam prescribe most?
In 2024 Medicare Part D data, Dr. Lam's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Pantoprazole Sodium and Omeprazole.
Has Dr. Gregory Mathias Lam received payments from drug or device companies?
CMS Open Payments shows $10,842 in general payments to Dr. Lam from 40 companies from 2016 to 2025. The largest total came from Olympus Corporation of the Americas.
How long has Dr. Gregory Mathias Lam been practicing?
Dr. Lam graduated from medical school in 2003, 23 years ago.
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