William George Tan, MD
Internal Medicine Physician · Eldersburg, MD
William George Tan, MD is an internal medicine physician with a practice address in Eldersburg, Maryland, and NPI 1386754455, issued on Aug 30, 2006. Check the license (Maryland D34849, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- William George Tan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D34849 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1645 Liberty RD, Eldersburg, MD 21784
- Phone
- (410) 795-7737
- Enumerated
- Aug 30, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 795-2828
- Medicaid ID
- 232951400 MD
- Medicare enrollment
- Enrolled (PECOS I20100608000291); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 1645 Liberty RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Olivia HillerClinical Social Worker1477387033
- Ellis Mez, M.D.Internal Medicine Physician1023029956
- Mindy Milstein, PHD PSYCHOLOGISTPsychologist1518956960
- Amen OkojieProfessional Counselor1659190478
- Edward Perl, M.D.Pediatric Adolescent Medicine Physician1487757209
- Cathy Reifman, M.D.Pediatric Adolescent Medicine Physician1437234093
Verify William George Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D34849Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% more Medicare Part D claims than the average internal medicine physician in 2024
6,257 Medicare Part D claims for 410 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 80 claims were for opioids.
Most prescribed
- Atorvastatin Calcium434 claims
- Amlodipine Besylate256 claims
- Levothyroxine Sodium218 claims
- Lisinopril214 claims
- Hydrochlorothiazide188 claims
- Omeprazole151 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $45.47
2 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Lifebridge Primary Care OF Eldersburg LLCSykesville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William George Tan among 3,904 internal medicine physician records in Maryland
William George Tan, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2003 among the 2,445 with a school on file
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 internal medicine physician records list a practice address in Eldersburg
They are 7 of the 324 NPPES records with a practice address in Eldersburg, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Eldersburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alva Baker, MDSykesville, MD 217841033119003
- Brigitte Grewe, DOEldersburg, MD 217841982345401
- Wilbur Kuo, M.D.Sykesville, MD 217841336118900
- Vaseem Malik, MDSykesville, MD 217841497716906
- Anne Martello, M.D.Sykesville, MD 217841275526451
- Ellis Mez, M.D.Eldersburg, MD 217841023029956
- Matthew Poffenroth, MDEldersburg, MD 217841487645347
- Ana Sarante, MEDICAL DOCTOREldersburg, MD 217841780790253
Common questions
What is William George Tan, MD's NPI number?
William George Tan, MD's National Provider Identifier (NPI) is 1386754455, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William George Tan, MD located?
The NPPES record lists a practice address at 1645 Liberty RD, Eldersburg, MD, 21784. Phone: (410) 795-7737. Providers update this record themselves, so call before visiting.
How can I verify William George Tan, MD's license?
NPPES lists Maryland license number D34849, 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.
How much does William George Tan, MD prescribe under Medicare Part D?
In 2024, William George Tan, MD had 6,257 Medicare Part D claims for 410 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William George Tan, MD's MIPS final score?
The 2023 MIPS final score is 88.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.