Johan Ahn, MD
NPI 1972546240 · Diagnostic Radiology Physician · Tacoma, WA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johan Ahn, MD is a Diagnostic Radiology Physician provider in Tacoma, WA (NPI 1972546240).
Provider details
- NPI number
- 1972546240
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD151077 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,562 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,250 | $8 |
| X-Ray of Chest, 2 Views71046 | 244 | $10 |
| X-Ray of Abdomen, 1 View74018 | 132 | $9 |
| X-Ray of Hip, 2-3 Views73502 | 86 | $11 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 61 | $11 |
| X-Ray of Shoulder, Minimum of 2 Views73030 | 58 | $9 |
| X-Ray of Knee, 3 Views73562 | 53 |
Practice location
Mailing address
Additional practice locations (1)
- 1301 Punchbowl StHonolulu, HI 96813-2499Phone: (808) 691-1000
Registry dates
- Enumerated
- 2006-06-14
- Last updated
- 2024-12-30
- Certified
- 2024-12-30
Frequently asked questions
- What is Johan Ahn's NPI number?
- Johan Ahn's National Provider Identifier (NPI) is 1972546240, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johan Ahn's specialty?
- Johan Ahn is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Johan Ahn located?
- Johan Ahn's practice location on file with NPPES is 1304 Fawcett Ave Ste 100, Tacoma, WA 98402-1900.
- What is Johan Ahn's phone number?
- The practice phone number listed in the NPPES registry for Johan Ahn is (253) 761-4200.
- Does Johan Ahn accept Medicare?
- Johan Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johan Ahn's NPI active?
- Yes — Johan Ahn's NPI (1972546240) is active in the NPPES registry as of the last update on 2024-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.