Joon Yun, M.D.
NPI 1952387680 · Pulmonary Disease Physician · Portsmouth, VA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joon Yun, M.D. is a Pulmonary Disease Physician provider in Portsmouth, VA (NPI 1952387680).
Provider details
- NPI number
- 1952387680
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101235221 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
127 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 91 | $202 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 22 | $124 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 14 | $79 |
Typical Medicare-allowed amounts for these services range $79–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-15
- Last updated
- 2017-09-15
Frequently asked questions
- What is Joon Yun's NPI number?
- Joon Yun's National Provider Identifier (NPI) is 1952387680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joon Yun's specialty?
- Joon Yun is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Joon Yun located?
- Joon Yun's practice location on file with NPPES is 620 John Paul Jones Cir, Portsmouth, VA 23708-2111.
- What is Joon Yun's phone number?
- The practice phone number listed in the NPPES registry for Joon Yun is (757) 953-2075.
- Does Joon Yun accept Medicare?
- Joon Yun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joon Yun's NPI active?
- Yes — Joon Yun's NPI (1952387680) is active in the NPPES registry as of the last update on 2017-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.