Justin Ahn, M.D.
NPI 1063755148 · Urology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Ahn, M.D. is a Urology Physician provider in San Francisco, CA (NPI 1063755148).
Provider details
- NPI number
- 1063755148
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A160202 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,278 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 342 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 330 | $153 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 105 | $214 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 81 | $193 |
| Electronic Assessment of Bladder Emptying51741 | 69 | $12 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 68 | 23 |
| Finasteride | 37 | 19 |
| Mirabegronbrand: Myrbetriq | 36 | 13 |
| Potassium Citratebrand: Potassium Citrate Er | 33 | — |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 25 | — |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 22 | 15 |
| Silodosin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$772 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-27
- Last updated
- 2020-01-16
- Certified
- 2020-01-16
Frequently asked questions
- What is Justin Ahn's NPI number?
- Justin Ahn's National Provider Identifier (NPI) is 1063755148, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Ahn's specialty?
- Justin Ahn is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Ahn located?
- Justin Ahn's practice location on file with NPPES is 400 Parnassus Ave, San Francisco, CA 94143-2202.
- What is Justin Ahn's phone number?
- The practice phone number listed in the NPPES registry for Justin Ahn is (415) 885-7748.
- Does Justin Ahn accept Medicare?
- Justin Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Ahn's NPI active?
- Yes — Justin Ahn's NPI (1063755148) is active in the NPPES registry as of the last update on 2020-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.