Dr. William John Mark Roach, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 17
- Part D claims, 2024
- 6,815
- Hospital affiliations
- 2
- Industry payments
- $2,151
- Practice address
- 400 W Mineral King Ave, Visalia, CA 93291
- Practice phone
- Call (559) 624-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Roach's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William John Mark Roach is a family medicine physician in Visalia, California
Dr. Roach practices at Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District.
Dr. Roach's NPI, 1538125497, was assigned on April 20, 2006. Dr. Roach graduated from Universidad Autonoma de Guadalajara in 1986. Dr. Roach holds California license A50330.
- NPI
- 1538125497NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406914050
- NPI enumeration date
- April 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (559) 624-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William John Mark Roach practices at Kaweah Health Medical Center in Visalia, California
Dr. Roach's primary practice is Kaweah Health Medical Center, at 400 W Mineral King Ave, Visalia, CA 93291 in Tulare County. The practice phone is (559) 624-2000.
- Kaweah Health Medical Center400 W Mineral King Ave, Visalia, CA 93291 · Tulare CountyPhone(559) 624-2000
Source: Dmand AI Affiliation Data
Dr. William John Mark Roach is affiliated with 5 sites of care and 3 medical groups
Dr. Roach's primary practice is Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District. Dr. Roach is also affiliated with Sierra View Medical Center. The medical group on file is Kaweah Health Cardiothoracic Surgery Clinic. Dmand AI also links Dr. Roach to 2 more group practices and clinics, 2 medical groups and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William John Mark Roach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Roach practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaweah Health Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaweah Delta Health Care District and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William John Mark Roach is one of 15,680 family medicine physicians in California
Family medicine is Dr. Roach's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Roach is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Roach's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists acne, acute kidney failure, acute sinusitis, acute skin infection, adjustment disease, alcohol use disorders, alzheimer's disease and aneurysm among the conditions Dr. Roach treats.
Family medicine physicians near Dr. Roach
Counts of family medicine physicians 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
Dr. William John Mark Roach billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Roach across 1 procedure code in 2024, all of them office visits, for 17 Medicare patients. Medicare paid $233 for them. Every service was in an office.
Dr. Roach's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5592024: 1697%
- Lab and pathology
- 2023: 3062024: 0100%
- Tests and treatments
- 2023: 342024: 0100%
- Surgery
- 2023: 362024: 0100%
Dr. Roach compared with the California median for family medicine physicians, 2024
- Dr. Roach
- California median
- Medicare services
- 16vs 24693% below
- Medicare patients
- 17vs 11886% below
- Part D claims
- 6,044vs 8337.3 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Roach's 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.
Need commercial claims for Dr. Roach?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Roach and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William John Mark Roach treated 17 Medicare patients in 2024, average age 76
CMS counts 17 Medicare patients who saw Dr. Roach in 2024. 75% of them have high blood pressure, and 71% have high cholesterol. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Roach's median patient age at 52, with 59% women.
Chronic conditions among Dr. Roach's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
Share of Medicare patients with each condition. A patient can have several.
Dr. Roach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William John Mark Roach wrote 6,815 Medicare Part D claims in 2024
In 2024, Dr. Roach wrote 6,815 Medicare Part D claims for 369 patients. 86% of them were for generic drugs. CMS names the drug for 6,044 of them, across 130 drugs with 11 or more claims each, at $585,111 in total drug cost. In 2023, CMS named 5,931 claims across 128 drugs.
Dr. Roach's Part D claims by kind of drug, 2024
- Generic5,829 claims86%
- Brand-name924 claims14%
- Other62 claims1%
Dr. Roach's 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 Dr. Roach's Part D claims, 2024
- Opioids5%373 of 6,815 claims
- Antibiotics2%131 of 6,815 claims
- Antipsychotics, patients 65 and over0%26 of 6,815 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,9312024: 6,0442%
Drugs named by CMS: 130 in 2024, 128 in 2023.
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
Dr. William John Mark Roach offers telehealth to Medicare patients
Dr. Roach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Roach as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William John Mark Roach received $2,151 in industry payments from 2016 to 2025
CMS Open Payments shows 124 general payments to Dr. Roach from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $229.
General payments to Dr. Roach by program year, 2016 to 2025
Companies that paid Dr. Roach the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William John Mark Roach has 1 award and honors on record
Dmand AI lists 1 award for Dr. Roach, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Roach
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. William John Mark Roach graduated from Universidad Autonoma de Guadalajara
Dr. Roach graduated from Universidad Autonoma de Guadalajara in 1986.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. William John Mark Roach accepts plans from 14 insurance carriers
Dr. Roach is in network with 14 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Humana
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Roach accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- EPO3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. William John Mark Roach's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William John Mark Roach
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William John Mark Roach's NPI number?
Dr. William John Mark Roach's NPI number is 1538125497. It was assigned on April 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William John Mark Roach?
Dr. William John Mark Roach is a family medicine physician in Visalia, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William John Mark Roach practice?
Dr. Roach practices at 400 W Mineral King Ave, Visalia, CA 93291. Dr. Roach's primary practice is Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District. Dmand AI also links Dr. Roach to 2 group practices and clinics, 2 medical groups and 1 home health agency.
What is Dr. William John Mark Roach's office phone number?
The practice phone on file for Dr. Roach is (559) 624-2000.
What is Dr. William John Mark Roach's medical license number?
Dr. Roach holds California license A50330, one of the licenses on file in 2 states.
Which states has Dr. William John Mark Roach been licensed in?
Dmand AI has state licenses on file for Dr. Roach in California (1992 to 2026) and Illinois (1987 to 1993).
Which hospitals is Dr. William John Mark Roach affiliated with?
Dr. Roach practices at Kaweah Health Medical Center in Visalia, California. Dr. Roach is also affiliated with Sierra View Medical Center.
What medical group is Dr. William John Mark Roach part of?
Dr. Roach is linked to Kaweah Health Cardiothoracic Surgery Clinic. Dmand AI links Dr. Roach to 2 more medical groups.
Does Dr. William John Mark Roach accept Medicare?
Yes. CMS data shows Dr. Roach billed Medicare for 16 services in 2024, and Dr. Roach accepts Medicare assignment.
Does Dr. William John Mark Roach offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Roach as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. William John Mark Roach see?
CMS counts 17 Medicare patients who saw Dr. Roach in 2024, with an average age of 76.
Is Dr. William John Mark Roach board certified?
Yes. Dr. Roach is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. William John Mark Roach bill to Medicare?
In 2024, Dr. Roach's most billed Medicare services were office visit, established patient (99213).
Where did Dr. William John Mark Roach go to medical school?
Dr. Roach graduated from Universidad Autonoma de Guadalajara in 1986.
What drugs does Dr. William John Mark Roach prescribe most?
In 2024 Medicare Part D data, Dr. Roach's most prescribed drugs by claims were Atorvastatin Calcium, Hydrocodone-Acetaminophen and Metformin HCl.
Has Dr. William John Mark Roach received payments from drug or device companies?
CMS Open Payments shows $2,151 in general payments to Dr. Roach from 27 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. William John Mark Roach been practicing?
Dr. Roach graduated from medical school in 1986, 40 years ago.
What insurance does Dr. William John Mark Roach accept?
Dr. Roach is in network with 14 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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