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Orthopedic Surgery

William H. Montgomery, MD

Works at hospitals in San Francisco, CA · California

Summary

Dr. William H. Montgomery, MD is an orthopedic surgeon at 1 Shrader St, Suite 650, San Francisco, CA 94117. Phone: (855) 581-3442. Accepts Medicare assignment. In 2024, William H. Montgomery had 146 Original Medicare patients and 4,349 services. NPI 1881756450. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about William H. Montgomery, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does William H. Montgomery accept Medicare assignment?
Yes. Medicare's clinician data says William H. Montgomery accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does William H. Montgomery see?
In 2024, CMS data shows 146 Original Medicare patients and 4,349 services for William H. Montgomery. This counts Original Medicare only and measures volume, not quality.
What is William H. Montgomery's NPI number?
1881756450. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for William H. Montgomery, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients146
Services billed to Medicare4,349
Different services or procedures30
Participating Medicare providerYes
Average age of these patients79

Most frequent services

  1. Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg (J7325)2,880 services
  2. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)664 services
  3. Injection, dexamethasone sodium phosphate, 1 mg (J1100)400 services
  4. Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)132 services
  5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)61 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • Arthritis75%
  • High blood pressure70%
  • Diabetes24%
  • Anxiety23%
  • Ischemic heart disease22%

Hospitals where William H. Montgomery works

Medicare's Facility Affiliation Data lists William H. Montgomery at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where William H. Montgomery is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists William H. Montgomery as a member of this group (CMS data updated October 2, 2026).

  • UCSF Medical Group Business Services1,598 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in San Francisco

Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.

All orthopedic surgeons in San Francisco →

Other clinicians in UCSF Medical Group Business Services

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolState University Of New York Downstate Medical Center
Graduation year1986 (40 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1881756450
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians