Guy Vin Chang, M.D.
NPI 1154718955 · Geriatric Medicine (Internal Medicine) Physician · Washington, DC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guy Vin Chang, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Washington, DC (NPI 1154718955).
Provider details
- NPI number
- 1154718955
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 11014 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,142 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 313 | $210 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 223 | $135 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 95 | $197 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 63 | $63 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 57 | $9 |
| Prolonged Home Or Residence Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By the Physician Or Qualif |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 86 | 28 |
| Atorvastatin Calcium | 74 | 28 |
| Diclofenac Sodium | 71 | 24 |
| Apixabanbrand: Eliquis | 62 | 23 |
| Furosemide | 58 | 24 |
| Losartan Potassium | 46 | 19 |
| Pantoprazole Sodium | 36 |
Practice location
Mailing address
Additional practice locations (4)
- 353 Fairmont BlvdRapid City, SD 57701-7375Phone: (605) 755-1000
- 1400 W 22nd StSioux Falls, SD 57105-1554Phone: (605) 357-1410
- 1305 W 18th StSioux Falls, SD 57105Phone: (605) 328-4973Fax: (605) 328-1295
- 5323 Harry Hines BlvdDallas, TX 75390-7201Phone: (214) 648-3111
Registry dates
- Enumerated
- 2015-04-20
- Last updated
- 2022-06-22
- Certified
- 2022-06-22
Frequently asked questions
- What is Guy Vin Chang's NPI number?
- Guy Vin Chang's National Provider Identifier (NPI) is 1154718955, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guy Vin Chang's specialty?
- Guy Vin Chang is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Guy Vin Chang located?
- Guy Vin Chang's practice location on file with NPPES is 110 Irving St Nw, Washington, DC 20010-3017.
- What is Guy Vin Chang's phone number?
- The practice phone number listed in the NPPES registry for Guy Vin Chang is (202) 877-7000.
- Does Guy Vin Chang accept Medicare?
- Guy Vin Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guy Vin Chang's NPI active?
- Yes — Guy Vin Chang's NPI (1154718955) is active in the NPPES registry as of the last update on 2022-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.