NPPES file of Aug 9, 2026

Gregory William Hosier, MD, MSC

Urology Physician · San Francisco, CA

Gregory William Hosier, MD, MSC is a urology physician with a practice address in San Francisco, California, and NPI 1902570716, issued on Aug 4, 2021. Check the license (California A174287, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1902570716
Name
Gregory William Hosier
Credential
MD, MSC
Primary taxonomy
Urology Physician 208800000X
License number
A174287 CA
Self-reported in NPPES; status is on the state search
Practice location
400 Parnassus Ave, San Francisco, CA 94143
Phone
(415) 353-2200
Enumerated
Aug 4, 2021
Record last updated
Aug 4, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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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.

  1. Jessica Abele, DPTPhysical Therapist1851648133
  2. Ian Adatia, MB CHBPediatric Cardiology Physician1427085299
  3. Daniel Adelman, M.D.Internal Medicine Physician1922041821
  4. Joshua Adler, MDInternal Medicine Physician1194781351
  5. Justin Ahn, M.D.Urology Physician1063755148
  6. Weiyun Ai, MDMedical Oncology Physician1649346842

Verify Gregory William Hosier in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A174287    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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Industry payments in 2024: $673.34

2 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. 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.

  1. Gregory Hosier$673.34
  2. Specialty average$3,800.04

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Gregory William Hosier among 1,524 urology physician records in California

Gregory William Hosier, MD, MSC 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 2021, is newer than 96% of them.

  • NPI issued2021 · 96% of these records are older, 2% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2021 · 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

  1. Laurence Baskin, M.D.San Francisco, CA 941431891722294
  2. Anthony Bella, M.D.San Francisco, CA 941431538278569
  3. Benjamin Breyer, M.D.San Francisco, CA 941431316160211
  4. Matthew Cooperberg, MDSan Francisco, CA 941431841219326
  5. Marc Dall'Era, M.D.San Francisco, CA 941431326134859
  6. Donna Deng, MDSan Francisco, CA 941431396796678
  7. Catherine Harris, M.D.San Francisco, CA 941431093041626
  8. Tom Lue, M.D.San Francisco, CA 941431184651820

Common questions

What is Gregory William Hosier, MD, MSC's NPI number?

Gregory William Hosier, MD, MSC's National Provider Identifier (NPI) is 1902570716, issued on Aug 4, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Gregory William Hosier, MD, MSC located?

The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 353-2200. Providers update this record themselves, so call before visiting.

How can I verify Gregory William Hosier, MD, MSC's license?

NPPES lists California license number A174287, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.