John A. Tam, M.D.
Anesthesiology Physician · Rockville, MD
John A. Tam, M.D. is an anesthesiology physician with a practice address in Rockville, Maryland, and NPI 1073551362, issued on Jun 2, 2006. Check the license (Maryland D24477, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John A. Tam
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- D24477 MD
Self-reported in NPPES; status is on the state search - Practice location
- 14820 Physicians LN, Rockville, MD 20850
- Phone
- (301) 838-9606
- Enumerated
- Jun 2, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,253 in Maryland → Look up another NPI →
Also registered at 14820 Physicians LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Austin, CRNACertified Registered Nurse Anesthetist1992745822
- Marc Beck, M.D.Anesthesiology Physician1912908526
- Susan Betz, CRNACertified Registered Nurse Anesthetist1568463602
- Jeffrey Briggs, M.D.Anesthesiology Physician1801841747
- Shiaw-Wei Chang, D.M.D.Orthodontics and Dentofacial Orthopedics Dentistry1821009168
- Satyam Chary, M.D.Anesthesiology Physician1629024732
Verify John A. Tam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D24477Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $198.30
9 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 17,774 providers of this specialty with any payment received $669.59 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.
John A. Tam among 1,253 anesthesiology physician records in Maryland
John A. Tam, M.D. is one of 1,253 anesthesiology physician records with a practice address in Maryland. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 49% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 anesthesiology physician records list a practice address in Rockville
They are 81 of the 14,353 NPPES records with a practice address in Rockville, and 1,253 anesthesiology physician records in Maryland.
All 1,253 in Maryland → Every provider in Rockville → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Marc Beck, M.D.Rockville, MD 208501912908526
- Jeffrey Briggs, M.D.Rockville, MD 208501801841747
- Melvin Coursey, M.D.Rockville, MD 208501992750822
- Lauren Deloach, M.D.Rockville, MD 208501104870039
- Danielle Dugan, D.ORockville, MD 208501194779116
- Stephanie Eiswert, M.D.Rockville, MD 208501700831674
- Roger Grayson, M.D.Rockville, MD 208501396746038
- Keith Hairston, M.D.Rockville, MD 208501164423968
Common questions
What is John A. Tam, M.D.'s NPI number?
John A. Tam, M.D.'s National Provider Identifier (NPI) is 1073551362, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John A. Tam, M.D. located?
The NPPES record lists a practice address at 14820 Physicians LN, Rockville, MD, 20850. Phone: (301) 838-9606. Providers update this record themselves, so call before visiting.
How can I verify John A. Tam, M.D.'s license?
NPPES lists Maryland license number D24477, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.