Catherine Day Lewis, PA

  • Woodland, CA
  • Physician assistant
NPI1720124423
Medicare services, 2024
101
Medicare patients, 2024
108
Part D claims, 2024
654
MIPS score, 2024
100
Affiliated sites
2
Practice address
632 W. Gibson Rd, Woodland, CA 95695
Practice phone
Call (530) 668-2632
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Primary & Specialty Care - Dignity Health Woodland Clinic

Mammography / Breast Imaging Center · Woodland, California

See all 3 affiliations

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Catherine Day Lewis is a physician assistant in Woodland, California

Catherine Lewis practices at Primary & Specialty Care - Dignity Health Woodland Clinic in Woodland, California.

Catherine Lewis' NPI, 1720124423, was assigned on January 29, 2007. Catherine Lewis holds California license 11994.

NPI and contact details
NPI enumeration date
January 29, 2007
NPI status
Active
Practice phone
(530) 668-2632
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
66
Medical school graduation
1986

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data

Catherine Day Lewis practices at Primary & Specialty Care - Dignity Health Woodland Clinic in Woodland, California

Catherine Lewis' primary practice is Primary & Specialty Care - Dignity Health Woodland Clinic, at 632 W. Gibson Rd, Woodland, CA 95695. The practice phone is (530) 668-2632.

  • Primary & Specialty Care - Dignity Health Woodland Clinic
    632 W. Gibson Rd, Woodland, CA 95695Phone(530) 668-2632

Source: Dmand AI Affiliation Data

Catherine Day Lewis is affiliated with 2 sites of care and 1 medical group

Catherine Lewis' primary practice is Primary & Specialty Care - Dignity Health Woodland Clinic in Woodland, California. The medical group on file is Mercy Medical Group. Dmand AI also links Catherine Lewis to 1 more group practice or clinic, named with a free account. Catherine Lewis' employer is on file too: a breast imaging center.

See all 3 affiliations for Catherine Lewis

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Catherine Day Lewis' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Catherine Lewis practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Primary & Specialty Care - Dignity Health Woodland ClinicAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Catherine Day Lewis is one of 11,482 physician assistants in California

Physician assistant is Catherine Lewis' primary specialty in the NPI Registry, under taxonomy code 363A00000X. Catherine Lewis is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Catherine Lewis is licensed in California.

Specialties and state licenses

  • Physician assistant, CaliforniaPrimaryLicense 11994 · taxonomy 363A00000X

Clinical focus

Dmand AI lists acute skin infection, anxiety, asthma, chronic kidney disease, chronic obstructive pulmonary disease (COPD), cold sores or genital herpes, conjunctivitis and contact dermatitis among the conditions Catherine Lewis treats.

Physician assistants near Catherine Lewis

Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Catherine Day Lewis billed Medicare for 101 services in 2024

CMS data shows 101 Medicare services from Catherine Lewis across 3 procedure codes in 2024, for 108 Medicare patients. Medicare paid $6,003 for them. Every service was in an office.

Medicare services, 2024101
Medicare patients108
Paid by Medicare$6,003
Procedure codes3

Catherine Lewis' Medicare services by type, 2024

  1. Office and hospital visits78
  2. Other services23

Catherine Lewis compared with the California median for physician assistants, 2024

  • Catherine Lewis
  • California median
Medicare services
101vs 20450% below
Medicare patients
108vs 105Close to median
Part D claims
302vs 24324% above

Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.

Catherine Lewis' most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Catherine Lewis

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Catherine Day Lewis treated 108 Medicare patients in 2024, average age 74

CMS counts 108 Medicare patients who saw Catherine Lewis in 2024. The largest group is 65 to 74, with 53 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 31% are also on Medicaid. Their average risk score is 1.24, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Catherine Lewis' median patient age at 71, with 60% women.

Medicare patients, 2024108
Average age74
Average risk score1.24
Also on Medicaid31%

Catherine Lewis' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Catherine Lewis' Medicare patients by sex, 2024

  • Women7569%
  • Men3331%

Chronic conditions among Catherine Lewis' Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol70%
  3. Arthritis56%
  4. Diabetes31%
  5. Mood disorders31%
  6. Chronic kidney disease27%
  7. Depression27%
  8. Osteoporosis24%

Share of Medicare patients with each condition. A patient can have several.

Catherine Lewis' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women60%
  • Men40%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Catherine Day Lewis wrote 654 Medicare Part D claims in 2024

In 2024, Catherine Lewis wrote 654 Medicare Part D claims for 194 patients. 87% of them were for generic drugs. CMS names the drug for 302 of them, across 15 drugs with 11 or more claims each, at $3,608 in total drug cost.

Part D claims, 2024654
Drugs named by CMS15
Total drug cost$3,608
Part D patients194

Catherine Lewis' Part D claims by kind of drug, 2024

  • Generic566 claims87%
  • Brand-name76 claims12%
  • Other12 claims2%

Catherine Lewis' most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Catherine Lewis' Part D claims, 2024

  • Opioids2%12 of 654 claims
  • Antibiotics3%17 of 654 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by Catherine Lewis

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Catherine Day Lewis scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Catherine Lewis for performance year 2024, reported through an alternative payment model (APM).

Catherine Lewis' MIPS scores, performance year 2024

  • 100of 100Final score
  • 86.3of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Catherine Day Lewis is board certified in certified physician assistant

  1. Board certified in certified physician assistantNational Commission on Certification of Physician Assistants (NCCPA)

Source: Dmand AI Professional Profile Data

Sources for Catherine Day Lewis's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesClinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Catherine Day Lewis

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Catherine Day Lewis' NPI number?

Catherine Day Lewis' NPI number is 1720124423. It was assigned on January 29, 2007, and it is active in the NPI Registry.

What does Catherine Day Lewis specialize in?

Catherine Day Lewis is a physician assistant in Woodland, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does Catherine Day Lewis practice?

Catherine Lewis practices at 632 W. Gibson Rd, Woodland, CA 95695. Catherine Lewis' primary practice is Primary & Specialty Care - Dignity Health Woodland Clinic in Woodland, California. Dmand AI also links Catherine Lewis to 1 group practice or clinic.

What is Catherine Day Lewis' office phone number?

The practice phone on file for Catherine Lewis is (530) 668-2632.

What is Catherine Day Lewis' medical license number?

Catherine Lewis holds California license 11994.

What medical group is Catherine Day Lewis part of?

Catherine Lewis is linked to Mercy Medical Group.

Does Catherine Day Lewis accept Medicare?

Yes. CMS data shows Catherine Lewis billed Medicare for 101 services in 2024.

What is Catherine Day Lewis' MIPS score?

Catherine Lewis' MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).

How many Medicare patients does Catherine Day Lewis see?

CMS counts 108 Medicare patients who saw Catherine Lewis in 2024, with an average age of 74.

Is Catherine Day Lewis board certified?

Yes. Catherine Lewis is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).

Show 3 more questionsShow fewer questions

What services does Catherine Day Lewis bill to Medicare?

In 2024, Catherine Lewis' most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).

What drugs does Catherine Day Lewis prescribe most?

In 2024 Medicare Part D data, Catherine Lewis' most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Lisinopril.

How long has Catherine Day Lewis been practicing?

Catherine Lewis graduated from medical school in 1986, 40 years ago.

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