Dr. John A. Tam, MD
- Medicare services, 2024
- 345
- Medicare patients, 2024
- 338
- Industry payments
- $351
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 10215 Fernwood Rd, Bethesda, MD 20817
- Practice phone
- Call (301) 530-2800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bethesda Endoscopy Center
Bethesda, Maryland
Find Dr. Tam's professional email, personal email and mobile number
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Dr. John A. Tam is an anesthesiologist in Bethesda, Maryland
Dr. Tam practices at Bethesda Endoscopy Center in Bethesda, Maryland.
Dr. Tam's NPI, 1073551362, was assigned on June 2, 2006. Dr. Tam holds Maryland license D24477.
- NPI
- 1073551362NPI Registry (opens in a new tab)
- NPI enumeration date
- June 2, 2006
- NPI status
- Active
- Practice phone
- (301) 530-2800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John A. Tam practices at Bethesda Endoscopy Center in Bethesda, Maryland
Dr. Tam's primary practice is Bethesda Endoscopy Center, at 10215 Fernwood Rd, Bethesda, MD 20817 in Montgomery County. The practice phone is (301) 530-2800.
- Bethesda Endoscopy Center10215 Fernwood Rd, Bethesda, MD 20817 · Montgomery CountyPhone(301) 530-2800
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John A. Tam is affiliated with 1 site of care
Dr. Tam's primary practice is Bethesda Endoscopy Center in Bethesda, Maryland.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John A. Tam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tam practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bethesda Endoscopy Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John A. Tam is one of 965 anesthesiologists in Maryland
Anesthesiology is Dr. Tam's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Tam is licensed in Maryland.
Specialties and state licenses
- Anesthesiology, MarylandPrimary
Anesthesiologists near Dr. Tam
Counts of anesthesiologists 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. John A. Tam billed Medicare for 345 services in 2024
CMS data shows 345 Medicare services from Dr. Tam across 4 procedure codes in 2024, for 338 Medicare patients. Medicare paid $38,336 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tam's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 2982024: 34516%
Dr. Tam compared with the Maryland median for anesthesiologists, 2024
- Dr. Tam
- Maryland median
- Medicare services
- 345vs 1013.4 times
- Medicare patients
- 338vs 17692% above
Medians across 918 anesthesiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Tam'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tam and other anesthesiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John A. Tam treated 338 Medicare patients in 2024, average age 73
CMS counts 338 Medicare patients who saw Dr. Tam in 2024. The largest group is 65 to 74, with 192 patients. 75% of them have high cholesterol, and 61% have high blood pressure. 3% are also on Medicaid. Their average risk score is 0.76, where 1.00 is the Medicare average.
Dr. Tam's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tam's Medicare patients by sex, 2024
- Women17953%
- Men15947%
Chronic conditions among Dr. Tam's Medicare patients, 2024
- High cholesterol75%
- High blood pressure61%
- Arthritis43%
- Cancer20%
- Osteoporosis20%
- Diabetes19%
- Ischemic heart disease18%
- Mood disorders16%
Share of Medicare patients with each condition. A patient can have several.
Source: Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
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Dr. John A. Tam received $351 in industry payments from 2019 to 2024
CMS Open Payments shows 17 general payments to Dr. Tam from 5 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $122.
General payments to Dr. Tam by program year, 2019 to 2024
Companies that paid Dr. Tam the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John A. Tam'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 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 | Medicare Physician & Other Practitioners - by Provider (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. John A. Tam
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. John A. Tam's NPI number?
Dr. John A. Tam's NPI number is 1073551362. It was assigned on June 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John A. Tam?
Dr. John A. Tam is an anesthesiologist in Bethesda, Maryland. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. John A. Tam practice?
Dr. Tam practices at 10215 Fernwood Rd, Bethesda, MD 20817. Dr. Tam's primary practice is Bethesda Endoscopy Center in Bethesda, Maryland.
What is Dr. John A. Tam's office phone number?
The practice phone on file for Dr. Tam is (301) 530-2800.
What is Dr. John A. Tam's medical license number?
Dr. Tam holds Maryland license D24477.
Does Dr. John A. Tam accept Medicare?
Yes. CMS data shows Dr. Tam billed Medicare for 345 services in 2024.
How many Medicare patients does Dr. John A. Tam see?
CMS counts 338 Medicare patients who saw Dr. Tam in 2024, with an average age of 73.
What services does Dr. John A. Tam bill to Medicare?
In 2024, Dr. Tam's most billed Medicare services were anesthesia (00812), anesthesia (00813) and anesthesia (00731).
Has Dr. John A. Tam received payments from drug or device companies?
CMS Open Payments shows $351 in general payments to Dr. Tam from 5 companies from 2019 to 2024. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. John A. Tam been practicing?
Dr. Tam's NPI was assigned in 2006.
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