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SOURCE DATA SEP 2026

Assisted Living, Nursing Homes · Medicare certified

Villa Siena

1855 Miramonte Avenue · Mountain View, CA 94040 · Lic. #430708114 (CA) · 77 certified beds

(650) 961-6484

LICENSED · Verify on official state lookup (opens in a new tab)

NPI 1730183724. Look this up in the CMS NPPES registry (opens in a new tab)

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About Villa Siena

In Mountain View, California, Villa Siena is listed as an assisted living community. Its reported capacity is 77 beds. The CA licensing record reads "LICENSED" for this listing. It is recorded as a nonprofit operator. Federal records list it as Medicare certified. Our copy of the inspection record holds 34 citations, the newest dated 28 July 2025. No fine or payment denial is on record against it. Staffing reports put it at 6.04 nurse hours per resident per day. Every fact above comes from the public records listed in the sources section on this page. The newest source file we hold for this listing is dated September 2026.

Public record

CMS Care Compare · Source data July 2026

Certification

  • Medicare-certified (CMS Certification Number on file)

Ratings

1.0(CMS Care Compare (nursing home rating))Source: CMS Care Compare · Updated 2026-08-01.GOV

Staffing rating

1.0

Quality-measure rating

1.0

Inspections on record

2

Cited deficiencies

24

1.0(CMS Care Compare (nursing home rating))Source: CMS Care Compare · Updated 2026-07-01.GOV

Staffing rating

1.0

Quality-measure rating

1.0

Inspections on record

2

Cited deficiencies

24

Not yet ratedSource: CMS Care Compare · Updated 2026Q1.GOV

Staffing rating

Not published

Quality-measure rating

Not published

Inspections on record

Not published

Cited deficiencies

Not published

Not yet ratedSource: CMS Care Compare · Updated 2025Q4.GOV

Staffing rating

Not published

Quality-measure rating

Not published

Inspections on record

Not published

Cited deficiencies

Not published

3.0(CMS Care Compare (nursing home rating))Source: CMS Care Compare · Updated 2026-06-01.GOV

Staffing rating

5.0

Quality-measure rating

1.0

Inspections on record

2

Cited deficiencies

24

Inspection history (34)

Records from December 2022 to July 2025.

  • April 22, 2024 · D

    Citation F0880

    Federal surveyors cited this nursing home on 2024-04-22 under CMS tag F0880 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Provide and implement an infection prevention and control program. The deficiency was recorded as corrected on 2024-05-09. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2024-04-22.GOV
  • April 22, 2024 · E

    Citation F0812

    Federal surveyors cited this nursing home on 2024-04-22 under CMS tag F0812 (CMS scope/severity E: pattern, no actual harm, potential for more than minimal harm) for Procure food from sources approved or considered satisfactory and store, prepare, distribute and serve food in accordance with professional standards. The deficiency was recorded as corrected on 2024-05-09. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2024-04-22.GOV
  • April 22, 2024 · D

    Citation F0813

    Federal surveyors cited this nursing home on 2024-04-22 under CMS tag F0813 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Have a policy regarding use and storage of foods brought to residents by family and other visitors. The deficiency was recorded as corrected on 2024-05-09. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2024-04-22.GOV
  • August 24, 2023 · D

    Citation F0726

    Federal surveyors cited this nursing home on 2023-08-24 under CMS tag F0726 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Ensure that nurses and nurse aides have the appropriate competencies to care for every resident in a way that maximizes each resident's well being. The deficiency was recorded as corrected on 2023-08-25. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2023-08-24.GOV
  • December 9, 2022 · D

    Citation F0761

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0761 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Ensure drugs and biologicals used in the facility are labeled in accordance with currently accepted professional principles; and all drugs and biologicals must be stored in locked compartments, separately locked, compartments for controlled drugs. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · E

    Citation F0880

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0880 (CMS scope/severity E: pattern, no actual harm, potential for more than minimal harm) for Provide and implement an infection prevention and control program. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0684

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0684 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Provide appropriate treatment and care according to orders, resident’s preferences and goals. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0712

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0712 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Ensure that the resident and his/her doctor meet face-to-face at all required visits. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0851

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0851 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Electronically submit to CMS complete and accurate direct care staffing information, based on payroll and other verifiable and auditable data. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0658

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0658 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Ensure services provided by the nursing facility meet professional standards of quality. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0755

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0755 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Provide pharmaceutical services to meet the needs of each resident and employ or obtain the services of a licensed pharmacist. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0727

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0727 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Have a registered nurse on duty 8 hours a day; and select a registered nurse to be the director of nurses on a full time basis. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · D

    Citation F0732

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0732 (CMS scope/severity D: isolated, no actual harm, potential for more than minimal harm) for Post nurse staffing information every day. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV
  • December 9, 2022 · E

    Citation F0812

    Federal surveyors cited this nursing home on 2022-12-09 under CMS tag F0812 (CMS scope/severity E: pattern, no actual harm, potential for more than minimal harm) for Procure food from sources approved or considered satisfactory and store, prepare, distribute and serve food in accordance with professional standards. The deficiency was recorded as corrected on 2023-01-08. Source: CMS Care Compare Health Deficiencies (as of 2026-06-01).

    View original record (opens in a new tab)Source: CMS Care Compare · Updated 2022-12-09.GOV

Penalties

Total fines on file: $0

Staffing

Latest: 6.04 nurse staffing hours per resident per day (2026Q1)

Staffing trend (5 periods)

  1. 2025Q46.12 hrs/resident/day
  2. 2026-06-016.12 hrs/resident/day
  3. 2026-07-016.04 hrs/resident/day
  4. 2026-08-016.04 hrs/resident/day
  5. 2026Q16.04 hrs/resident/day

Most recent period is lower than 2025Q4 (-0.08 hrs/resident/day). Figures are CMS-reported nurse staffing hours, not our estimate.

Ownership

Non profit - Corporation

Recent changes to this listing

Watch this facility: new record changes publish to an RSS feed any feed reader can follow. No signup.

Each line is a difference between two readings of a government file. It says what the source reported, not what the provider did.

  1. Sep 2, 2026Listed capacity changed

    Listed capacity changed from 30 to 77 beds.

    Reported by California RCFE

  2. Aug 4, 2026Listed capacity changed

    Listed capacity changed from 77 to 30 beds.

    Reported by CMS nursing homes (provider info)

  3. Jul 26, 2026Listed capacity changed

    Listed capacity changed from 30 to 77 beds.

    Reported by California RCFE

  4. Jul 23, 2026First appeared in our data

    This listing first appeared in the government file we read. That is usually when it entered the file, not the day it opened.

    Reported by CMS nursing homes (provider info)

Ratings, inspections, and penalties are public records, reproduced in plain English without edits to their substance. View source records · What these measures mean.

Typical cost

Genworth CareScout Cost of Care Survey · 2025

This provider doesn't publish a specific price to us. Below is the typical CA range for the care type(s) it offers. Use it as context, not a quote.

Assisted Living

Median · CA$7,000/mo
See full CA cost breakdownSource: Genworth CareScout Cost of Care Survey · Updated 2025

Nursing Homes

Median · CA$12,167/mo
See full CA cost breakdownSource: Genworth CareScout Cost of Care Survey · Updated 2025

Nearby alternatives

Other licensed providers in Mountain View, with their own public records.

Compare side by side
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A comparison puts both public records in one view and marks any measure the two are not held to alike, so a blank never reads as a bad score.

Deciding between options? Complete Guide to Assisted Living (2026)

Check availability and pricing at Villa Siena

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Trust & methodology

Where this information came from

Each block below is one file we read, the date on that file, and the fields on this page that came from it. The date is when the source published or we retrieved it, not the day we last looked at this listing.

California RCFEas of September 2026
Care types, City, County, License lookup link, License number, License status, Licensed capacity, Licensing state, Name, Phone number, State, Street address, ZIP code
Nppesas of July 2026
NPI
CMS nursing homes (provider info)as of July 2026
Chain identifier, Chain name, CMS Special Focus status, Map location, Medicare certification number, Ownership type
CMS nursing homes (payroll-based journal staffing)as of June 2026
Staffing hours per resident day

Read how we handle every file on the data sources page.

Villa Siena in Mountain View, CA · Inspections page 2 · ElderCareCosts