Justin Ahn, M.D.
Urology Physician · San Francisco, CA
Justin Ahn, M.D. is a urology physician with a practice address in San Francisco, California, and NPI 1063755148, issued on Mar 27, 2013. Check the license (California A160202, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Justin Ahn
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- A160202 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 885-7748
- Enumerated
- Mar 27, 2013
- Record last updated
- Jan 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191028002588); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest urology physician records → All 1,524 in California → Look up another NPI →
Also registered at 400 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Daniel Adelman, M.D.Internal Medicine Physician1922041821
- Joshua Adler, MDInternal Medicine Physician1194781351
- Weiyun Ai, MDMedical Oncology Physician1649346842
- Christine Ainza, AGACNP-BCAcute Care Nurse Practitioner1346783974
Verify Justin Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A160202Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average urology physician in 2024
418 Medicare Part D claims for 132 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl68 claims
- Finasteride37 claims
- Myrbetriq36 claims
- Potassium Citrate Er33 claims
- Alfuzosin Hcl Er25 claims
- Nitrofurantoin Mono-Macro22 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $772.39
10 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 9,340 providers of this specialty with any payment received $3,800.04 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Ahn among 1,524 urology physician records in California
Justin Ahn, M.D. is one of 1,524 urology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 75% of them.
- NPI issued2013 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2013 · median 2003 among the 1,049 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
All 1,524 in California → Every provider in San Francisco → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Laurence Baskin, M.D.San Francisco, CA 941431891722294
- Anthony Bella, M.D.San Francisco, CA 941431538278569
- Benjamin Breyer, M.D.San Francisco, CA 941431316160211
- Matthew Cooperberg, MDSan Francisco, CA 941431841219326
- Marc Dall'Era, M.D.San Francisco, CA 941431326134859
- Donna Deng, MDSan Francisco, CA 941431396796678
- Catherine Harris, M.D.San Francisco, CA 941431093041626
- Tom Lue, M.D.San Francisco, CA 941431184651820
Common questions
What is Justin Ahn, M.D.'s NPI number?
Justin Ahn, M.D.'s National Provider Identifier (NPI) is 1063755148, issued on Mar 27, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Justin Ahn, M.D. located?
The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 885-7748. Providers update this record themselves, so call before visiting.
How can I verify Justin Ahn, M.D.'s license?
NPPES lists California license number A160202, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justin Ahn, M.D. prescribe under Medicare Part D?
In 2024, Justin Ahn, M.D. had 418 Medicare Part D claims for 132 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is Justin Ahn, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.