NPPES file of Aug 9, 2026

Guy Vin Chang, M.D.

Geriatric Medicine (Internal Medicine) Physician · Washington, DC

Guy Vin Chang, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Washington, District of Columbia, and NPI 1154718955, issued on Apr 20, 2015. Check the license (District of Columbia MD210002191, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1154718955
Name
Guy Vin Chang
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License numbers
MD210002191 DC
11014 SD
T0741 TX
Self-reported in NPPES; status is on the state search
Practice location
110 Irving St NW, Washington, DC 20010
Phone
(202) 877-7000
Enumerated
Apr 20, 2015
Record last updated
Jun 22, 2022
Medicare enrollment
Enrolled (PECOS I20220829003825); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 22 in District of Columbia → Look up another NPI →

Also registered at 110 Irving St NW

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Margarita Abbey, NPNurse Practitioner1841245487
  2. Lauren Abbott, M.D.Emergency Medicine Physician1356576383
  3. Taha Abdalla, MDNeonatal-Perinatal Medicine Physician1225016587
  4. Mouin Abdallah, MDCardiovascular Disease Physician1063498780
  5. Waseem Abdallah, M.D.Psychiatry Physician1265961452
  6. Samer Abdel Al, MDOrthopaedic Surgery Physician1558778548

Verify Guy Vin Chang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
    Search for license MD210002191    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the District of Columbia license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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67% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

1,393 Medicare Part D claims for 186 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 51 claims were for opioids.

  1. Guy Vin Chang1,393
  2. Specialty average4,246

Most prescribed

  1. Amlodipine Besylate86 claims
  2. Atorvastatin Calcium74 claims
  3. Diclofenac Sodium71 claims
  4. Eliquis62 claims
  5. Furosemide58 claims
  6. Losartan Potassium46 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.

Bills Medicare through one group practice

  1. Medstar Total Elder Care, LLCWashington, DC

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Guy Vin Chang among 22 geriatric medicine (internal medicine) physician records in District of Columbia

Guy Vin Chang, M.D. is one of 22 geriatric medicine (internal medicine) physician records with a practice address in District of Columbia. 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 2015, is newer than 77% of them.

  • NPI issued2015 · 77% of these records are older, 18% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2014 · median 1999 among the 13 with a school on file
  • Record last updated2022 · 64% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in District of Columbia

There are 22 geriatric medicine (internal medicine) physician records in District of Columbia.

All 22 in District of Columbia → Every provider in Washington → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Austin Armstrong, MDWashington, DC 200101881251320
  2. Stephanie Bruce, MDWashington, DC 200101225084981
  3. Raj Mathur, MDWashington, DC 200101992864177
  4. Paul Rhodes, M.D.Washington, DC 200091780738971
  5. Louisa Whitesides, M.D.Washington, DC 200161356703011
  6. Victoria Fedorova, M.D.Washington, DC 200171306100185
  7. Sharyn Horwitz, MDWashington, DC 200171881626141
  8. Robert Blackmon, M.D.Washington, DC 200321407987076

Common questions

What is Guy Vin Chang, M.D.'s NPI number?

Guy Vin Chang, M.D.'s National Provider Identifier (NPI) is 1154718955, issued on Apr 20, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Guy Vin Chang, M.D. located?

The NPPES record lists a practice address at 110 Irving St NW, Washington, DC, 20010. Phone: (202) 877-7000. Providers update this record themselves, so call before visiting.

How can I verify Guy Vin Chang, M.D.'s license?

NPPES lists District of Columbia license number MD210002191, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Guy Vin Chang, M.D. prescribe under Medicare Part D?

In 2024, Guy Vin Chang, M.D. had 1,393 Medicare Part D claims for 186 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.