Quick answers
- Does Nicholas J. Perrotto Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas J. Perrotto Jr. 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 Nicholas J. Perrotto Jr. see?
- In 2024, CMS data shows 303 Original Medicare patients and 4,572 services for Nicholas J. Perrotto Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Nicholas J. Perrotto Jr.'s NPI number?
- 1538235734. 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 Nicholas J. Perrotto Jr., 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 patients | 303 |
|---|---|
| Services billed to Medicare | 4,572 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg (J7325)2,906 services
- Aspiration and/or injection of fluid from large joint (20610)306 services
- Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose (J7324)273 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)271 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)140 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 pressure69%
- Osteoporosis28%
- Ischemic heart disease26%
- Chronic kidney disease25%
Hospitals where Nicholas J. Perrotto Jr. works
Medicare's Facility Affiliation Data lists Nicholas J. Perrotto Jr. 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.
- El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308
Practice locations
Addresses where Nicholas J. Perrotto Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 2500 Grant RdMountain View, CA 94040 (650) 940‑7000
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
- 701 E El Camino RealMountain View, CA 94040 (650) 691‑6174
Group practices
Medicare enrollment lists Nicholas J. Perrotto Jr. as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Mountain View
Clinicians with the same Medicare primary specialty in Mountain View, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538235734 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians