Quick answers
- Does Changsoo Hahm accept Medicare assignment?
- Yes. Medicare's clinician data says Changsoo Hahm accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Changsoo Hahm see?
- In 2024, CMS data shows 459 Original Medicare patients and 1,070 services for Changsoo Hahm. This counts Original Medicare only and measures volume, not quality.
- What is Changsoo Hahm's NPI number?
- 1093025306. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Changsoo Hahm, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 459 |
|---|---|
| Services billed to Medicare | 1,070 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)328 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)325 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)310 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)45 services
- Critical care, first 30-74 minutes (99291)29 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Stroke or mini-stroke73%
- Diabetes56%
- Arthritis55%
- Chronic kidney disease52%
Hospitals where Changsoo Hahm works
Medicare's Facility Affiliation Data lists Changsoo Hahm at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- MedStar Good Samaritan HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210056
- MedStar Union Memorial HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210024
Practice locations
Addresses where Changsoo Hahm is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1406 Crain S Hwy 106Glen Burnie, MD 21061 (410) 768‑6440
- 201 E University PkwyBaltimore, MD 21218 (410) 554‑2000
- 3304 Guilford AveBaltimore, MD 21218 (410) 554‑6740
- 3304 Guilford Ave, Mmg at Guilford AveBaltimore, MD 21218 (410) 554‑6740
- 5601 Lloch Raven BlvdBaltimore, MD 21239
Group practices
Medicare enrollment lists Changsoo Hahm as a member of this group (CMS data updated October 2, 2026).
- MedStar Medical Group II LLC3,767 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Glen Burnie
Clinicians with the same Medicare primary specialty in Glen Burnie, MD — not a recommendation.
Other clinicians in MedStar Medical Group II LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1093025306 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians