Map showing the location of Rancho Mesa Care Center in Alta Loma, California
9333 La Mesa Dr, Alta Loma, CA, 91701

Overall Score

CMS Five-Star Quality Rating
5/5Much above averageCMS Five-Star overall rating
  1. Much below average
  2. Below average
  3. Average
  4. Above average
  5. Much above average

Where it ranks

  • CaliforniaAbove 76% of peers1,154 rated homes · average 3.2★
  • San Bernardino CountyAbove 60% of peers54 rated homes · average 3.9★
  • United StatesAbove 80% of peers14,574 rated homes · average 3.0★

How the rating is built

  • Health inspectionsStarting point4★+1.2 vs CA avg
  • StaffingCan add or remove a star2★−1.1 vs CA avg
  • Quality measuresCan add or remove a star5★+0.9 vs CA avg

CMS starts from the health inspection stars, then adds or subtracts a star for staffing and for quality measures. Stars are assigned relative to other facilities in the same state.

Ratings & measures

Tap a row to see what it means
Health inspection ratingCMS stars from the last three on-site inspection cycles4★Above 66% of peersCA avg2.8★U.S. avg2.8★
What is health inspection rating?

Stars assigned from the last three standard surveys and every complaint investigation in that window, weighted toward the most recent and the most serious findings. CMS assigns these stars relative to other facilities in the same state.

Why it matters

It carries the most weight in the overall rating and is the only domain based on what trained inspectors saw on site rather than what the facility reported.

Staffing ratingCMS stars from payroll-reported hours and turnover2★Above only 8% of peersCA avg3.1★U.S. avg2.9★
What is staffing rating?

Nurse and aide hours per resident day from payroll records CMS collects every quarter, adjusted for how much care residents need, plus staff turnover and weekend coverage.

Why it matters

More hours and lower turnover are the strongest predictors of fewer falls, pressure sores, and avoidable hospital stays.

Quality measures ratingCMS stars from clinical outcomes and resident assessments5★Above 57% of peersCA avg4.1★U.S. avg3.6★
What is quality measures rating?

Clinical outcomes from resident assessments and Medicare claims: falls with injury, pressure ulcers, hospitalizations, antipsychotic use, and more, for both short-stay and long-stay residents.

Why it matters

It shows whether care is working, but part of it comes from the facility’s own assessments, so read it alongside the inspection results.

Total nurse hoursPer resident per day, all nursing staff3.88hrsAbove only 14% of peersCA avg4.51Benchmark4.10
What is total nurse hours?

All licensed nurse and aide hours worked, divided by the number of residents, on an average day. Reported from payroll, not self-reported.

Why it matters

Federal research links 4.1 hours a day to fewer avoidable harms. Below about 3 hours, residents wait longer for help with basics like toileting and repositioning.

RN hoursPer resident per day, registered nurses only0.24hrsAbove only 4% of peersCA avg0.65Benchmark0.75
What is rn hours?

Registered nurse hours only. RNs assess residents, manage medications, and catch changes in condition; LPNs and aides deliver most hands-on care.

Why it matters

RN coverage is the staffing measure most tied to fewer hospital transfers and infections, and it is where thinly staffed facilities cut first.

Nursing staff turnoverShare of nursing staff who left within a year · lower is better47%Above only 21% of peersCA avg38%RN turnover
What is nursing staff turnover?

The share of nursing staff who left within the past year, from the same payroll data.

Why it matters

High turnover means residents are cared for by people who do not know them, and it is one of the strongest predictors of inspection problems.

Fines in the last three yearsCivil money penalties imposed by CMS · lower is better$0Above only 45% of peersCA avg$26,970Fines · denials0 · 0
What is fines in the last three years?

Civil money penalties CMS imposed after serious or uncorrected deficiencies, and denials of Medicare payment for new admissions.

Why it matters

Penalties follow the worst inspection findings. A recent fine is the clearest sign that inspectors found real harm.

Inspection history

Last three inspection cycles
30citations
7inspection dates
0actual harm (G–I)
0immediate jeopardy (J–L)
Sep 18, 2025most recent

Citations by monthJun 2023 – Sep 2025

  • No actual harm (D–F)
  • Actual harm (G–I)
  • Immediate jeopardy (J–L)
  • $Fine or payment denial

Click a month or a year to filter the findings below. Arrow keys move between months; Esc clears.

Sep 18, 20257 citationsCycle 1worst F · no actual harm
  1. F755Provide pharmaceutical services to meet the needs of each resident and employ or obtain the services of a licensed pharmacist.Pharmacy ServiceD · isolatedCorrected Oct 18, 2025
  2. F880Provide and implement an infection prevention and control program.Infection ControlD · isolatedCorrected Oct 18, 2025
  3. F761Ensure 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.Pharmacy ServiceD · isolatedCorrected Oct 18, 2025
  4. F759Ensure medication error rates are not 5 percent or greater.Pharmacy ServiceD · isolatedCorrected Oct 18, 2025
  5. F686Provide appropriate pressure ulcer care and prevent new ulcers from developing.Quality of Life and CareD · isolatedCorrected Oct 18, 2025
  6. F689Ensure that a nursing home area is free from accident hazards and provides adequate supervision to prevent accidents.Quality of Life and CareD · isolatedCorrected Oct 18, 2025
  7. F727Have 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.Nursing and Physician ServicesF · widespreadCorrected Oct 18, 2025
Mar 18, 20251 citationCycle 1worst D · no actual harm
  1. F677Provide care and assistance to perform activities of daily living for any resident who is unable.Quality of Life and CareD · isolatedCorrected Mar 27, 2025
Aug 9, 20248 citationsCycle 2worst F · no actual harm
  1. Encode each resident’s assessment data and transmit these data to the State within 7 days of assessment.Resident Assessment and Care PlanningD · isolatedCorrected Sep 3, 2024
  2. F692Provide enough food/fluids to maintain a resident's health.Quality of Life and CareD · isolatedCorrected Sep 3, 2024
  3. F726Ensure that nurses and nurse aides have the appropriate competencies to care for every resident in a way that maximizes each resident's well being.Nursing and Physician ServicesD · isolatedCorrected Sep 3, 2024
  4. F755Provide pharmaceutical services to meet the needs of each resident and employ or obtain the services of a licensed pharmacist.Pharmacy ServiceD · isolatedCorrected Sep 3, 2024
  5. F761Ensure 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.Pharmacy ServiceD · isolatedCorrected Sep 3, 2024
  6. F803Ensure menus must meet the nutritional needs of residents, be prepared in advance, be followed, be updated, be reviewed by dietician, and meet the needs of the resident.Nutrition and DietaryF · widespreadCorrected Sep 3, 2024
  7. F805Ensure each resident receives and the facility provides food prepared in a form designed to meet individual needs.Nutrition and DietaryE · patternCorrected Sep 3, 2024
  8. F812Procure food from sources approved or considered satisfactory and store, prepare, distribute and serve food in accordance with professional standards.Nutrition and DietaryF · widespreadCorrected Sep 3, 2024
Nov 14, 20231 citationCycle 3worst D · no actual harm
  1. F551Give the resident's representative the ability to exercise the resident's rights.Resident RightsD · isolatedCorrected Nov 28, 2023
Sep 21, 20231 citationCycle 3worst D · no actual harm
  1. F689Ensure that a nursing home area is free from accident hazards and provides adequate supervision to prevent accidents.Quality of Life and CareD · isolatedCorrected Oct 18, 2023
Aug 31, 20231 citationCycle 3worst D · no actual harm
  1. Provide appropriate treatment and care according to orders, resident’s preferences and goals.Quality of Life and CareD · isolatedCorrected Sep 11, 2023
Jun 29, 202311 citationsCycle 3worst F · no actual harm
  1. F641Ensure each resident receives an accurate assessment.Resident Assessment and Care PlanningD · isolatedCorrected Jul 28, 2023
  2. F645PASARR screening for Mental disorders or Intellectual DisabilitiesResident Assessment and Care PlanningD · isolatedCorrected Jul 28, 2023
  3. Provide appropriate treatment and care according to orders, resident’s preferences and goals.Quality of Life and CareE · patternCorrected Jul 28, 2023
  4. F761Ensure 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.Pharmacy ServiceD · isolatedCorrected Jul 28, 2023
  5. F801Employ sufficient staff with the appropriate competencies and skills sets to carry out the functions of the food and nutrition service, including a qualified dietician.Nutrition and DietaryD · isolatedCorrected Jul 28, 2023
  6. F804Ensure food and drink is palatable, attractive, and at a safe and appetizing temperature.Nutrition and DietaryD · isolatedCorrected Jul 28, 2023
  7. F812Procure food from sources approved or considered satisfactory and store, prepare, distribute and serve food in accordance with professional standards.Nutrition and DietaryF · widespreadCorrected Jul 28, 2023
  8. F881Implement a program that monitors antibiotic use.Infection ControlD · isolatedCorrected Jul 28, 2023
  9. F880Provide and implement an infection prevention and control program.Infection ControlF · widespreadCorrected Jul 28, 2023
  10. F908Keep all essential equipment working safely.EnvironmentalD · isolatedCorrected Jul 28, 2023
  11. F583Keep residents' personal and medical records private and confidential.Resident RightsD · isolatedCorrected Jul 28, 2023

Staffing

From quarterly payroll reports

Hours per resident per day

  • All nursing staffRNs, LPNs and aides combined3.88hrsAbove only 14% of peers−0.63 vs CA avg
  • Registered nursesRN hours only0.24hrsAbove only 4% of peers−0.41 vs CA avg
  • Licensed practical nursesLPN hours1.21hrs
  • Nurse aidesCNA hours2.43hrs
  • Weekend nursingAll staff on Saturdays and Sundays3.54hrs
  • California average
  • Research benchmark (4.10 total, 0.75 RN)

Turnover & capacity

  • Nursing staff turnoverShare who left within a year · lower is better47%Above only 21% of peersCA avg 38%
  • RN turnoverRegistered nurses onlyNot ranked by CMS
  • Administrators who leftIn the past year0Stable leadership
  • Occupancy59 certified beds · ~61 residents a day103%Top 1%CA avg 88%

Fines & penalties

Roughly the past three years

Enforcement summary

  • $0In fines
  • 0Fines
  • 0Payment denials
  • $26,970CA avg in fines
Above only 45% of peersFewer fines than 45% of rated homes in California

Actions on record

No fines or payment denialsNothing on record in the current reporting window. California facilities average 1.3 penalties.

Ownership

As filed with CMS

Structure

Ownership type
For profit - Limited Liability company
Chain
Independent
Certification
Medicare and Medicaid
Location type
Urban
Ownership change
None in the last 12 months

People and entities on file

Direct owners (5%+)
  • Marylynn Mahan
  • Philip Weinberger
Operational or managerial control
  • P & M Management INC
  • Renew Health Consulting Services LLC
  • Vatsala Sharma
  • Jhujhar Singh
Corporate directors
  • Marylynn Mahan
  • Philip Weinberger
Corporate officers
  • Marylynn Mahan
  • Philip Weinberger
Contracted managers
  • Cheryl Petterson
Managing employees
  • Rhonda Caldwell
  • Marylynn Mahan

Person Organization

Sources & notes

Public data, updated quarterly

Data sources

  • CMS Care Compare · Provider InformationStar ratings, staffing hours, turnover, penalties and flags · processed February 2026.
  • CMS Health CitationsEvery deficiency from the last three inspection cycles, with scope, severity and inspection cycle.
  • CMS Penalties and Ownership filesCivil money penalties, payment denials, and the owners and managers on file.

Notes

  • CMS Certification Number 555521 · 9333 La Mesa Dr, Alta Loma, CA, 91701.
  • Percentiles compare this facility with every rated nursing home in California and San Bernardino County. Turnover and fines are inverted so a high percentile is always good.
  • This is an informational summary of public data, not medical, legal, or placement advice. Facilities cannot pay to change it; a facility that believes a record is wrong can dispute it with CMS.

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